#"Removed Columns" = Table.RemoveColumns(#"Removed Duplicates",{"RowAsRecord", "SortedList"}) To subscribe to this RSS feed, copy and paste this URL into your RSS reader. What is the motivation behind the AAAAGCAUAU GACUAAAAAA of the mRNA SARS-CoV-2 vaccine when encoding its polyadenylated ending? I am trying to create an relationship table on related customers. Aug You can count distinct elements by running: select count( distinct policy_i client_id) from policy_client;. Is the Rule of 5 (for constructors and destructors) outdated? Fastest Entity Framework Extensions . Expand the two arrows in the column header -> deselect column Join Deselect the checkbox saying ‘Use original column name as prefix’ -> click OK The result of these steps is that all the combinations of data have appeared in the query. A composite key is a combination of two or more columns in a table that can be used to uniquely identify each row in the table when the columns are combined uniqueness is guaranteed, but when it taken individually it does not guarantee uniqueness. i.e. Had no idea you could do this. rev 2020.12.18.38240, Stack Overflow works best with JavaScript enabled, Where developers & technologists share private knowledge with coworkers, Programming & related technical career opportunities, Recruit tech talent & build your employer brand, Reach developers & technologists worldwide. This was a life saver. SQL PRIMARY KEY Constraint. Insert results of a stored procedure into a temporary table, List of all index & index columns in SQL Server DB. If you work with multiple files, you may want to check out this post on how to consolidate those in an easy way. Hi, How can I do this multiple times? So I think the only case you might have to protect against here is the where all three columns contain NULL at the same time. Now assume that there are 4 staff and they do their work in each day of the week.That means in each day there work 4 staff and 1 staff work in 7 days. Excel Gorilla is a free resource site for Excel and Power BI enthusiasts. Previous method to produce all possible combinations was my first approach. Simply use distinct. SQL with 2 columns in where condition. Then sort the list, and lastly remove the duplicates in the sorted list column. 122 and 221. Learn How to Combine Data with a CROSS JOIN - Essential SQL Operational amplifier when the non-inverting terminal is open. What you’re looking for can be reached by first transforming a row into a list. Bye, bye VLOOKUP – hello Merge! You can achieve the same using a formula. We want to make sure there are no duplicate values in Product_Name column in the same category, so we need to define a composite unique index on column Product_Name and Category_ID. The client did not want to use a pivot table to show the numbers. In order, the tables names are CountriesCurrencies, BusinessUnits and Metrics. 9, 1, 2, 3, 4, 5, 6. I think the problem is in where clause, because it cannot take two columns . This code utilizes CROSS JOIN so I found that it is necessary to split the two columns into two separate tables (each with one column). Also need to do this without running a MACRO. @Sir Wobin: The issue is that I need to return all unique combinations. Creating SQL UNIQUE constraint You can create UNIQUE constraints using CREATE TABLE or ALTER TABLE statement. You can do this as many times as you like. Bulk Update . B. sicherstellen, dass keine doppelten Werte in bestimmte Spalten eingegeben werden können, die nicht Teil eines Primärschlüssels sind. To learn more, see our tips on writing great answers. There are times where you need an efficient way to produce all unique combinations of your data. You can define a unique constraint when creating the table (for example on the combination of columns C1, C2 and C3): CREATE TABLE [dbo]. I have multiple combinations to use the query always in pairs. Bulk Insert . Their situation is as follows. MySQL Counting Distinct Values on Multiple Columns (2) I wrote a script that runs each time a user logs into a computer in our domain. lookup function join based on multiple fields, Add a column with a default value to an existing table in SQL Server, How to return only the Date from a SQL Server DateTime datatype. Hi everyone, I need to make a list of all possible combinations of two lists as shown in the following example. You can then display the output in an orderly fashion by using the ORDER BY clause. HERE ERROR Is there anyway to do that? #"Removed Duplicates" = Table.Distinct(#"Added Custom1", {"SortedList"}), For example, you can use UNIQUE constraints to make sure that no duplicate values are entered in specific columns that do not participate in a primary key. I am wondering if you might know more about the last step I need to do. How did Neville break free of the Full-Body Bind curse (Petrificus Totalus) without using the counter-curse? http://www.calculatorsoup.com/calculators/discretemathematics/combinations.php. (I believe this behaviour varies across RDBMSes.) Any number of users can log into any number of computers. Or perhaps you work with single columns that you’d like to turn into a table. #"Added Custom" = Table.AddColumn(Source, "RowAsRecord", each Record.ToList(_)), However, I’m still learning every day, especially in the area of custom functions. You can generate a script to identify all possible candidate keys with a technique like the example below. Hi, I made a table named staff_info containing 4 column name,day,duty_start,duty_finish. This script makes a record of the user as well as the computer they logged into. +1 for that! I want to make the combination between FirstColumn and SecondColumn as unique. if I select number 9 as a value then on the next drop down if it highlights number 8 (as that would be unique), or I can choose number 6 (not unique) so then the third option would highlight number 7 (as this would make it unique). You cannot designate the same column or combination of columns as both a unique … The PRIMARY KEY constraint uniquely identifies each record in a table. The required numbers were represented in several different pivot tables. I got through and had the 343 different combinations, but since the data in my 3 columns is the same, some of them are duplicates. For both column BusinessUnits and Metrics: The result of these steps is that all the combinations of data have appeared in the query. For this example I start by select the Query CountriesCurrencies. The table objects contain the data we just merged. When a unique constraint is created on a set of nullable columns, NULL is treated (in terms of uniqueness) like any other of the distinct values in the set. Note that if a combination of columns is used in the SELECT DISTINCT query, then the same combinations of columns should also be used with the ORDER BY clause. Unfortunately, Excel isn’t recognizing the fact that they are duplicates because the sequencing is different, i.e. Hi Josh, welcome to Stack Overflow! Do I have to make the query for each combination? I have background in Finance and work with customers to find business solutions that increase insight and quicken decision making. Perform these steps again, but this time merge table CountriesCurrencies with Metrics. He believes learning is one of the great pleasures in life and wants to share his knowledge to help you improve your skills. To make a pair of columns unique, use UNIQUE with ALTER TABLE command. Their last step is to convert the numbers to the reporting currency for consolidation. Save my name, email, and website in this browser for the next time I comment. Basically when I update Column A & B, the combinations should get appear in the “Output” column. Bassam Alugili. You can create a UNIQUE constraint on one or more columns of a table. Count () function and select with distinct on multiple columns. I'm having trouble creating a view in cache with query like: SELECT column1, column2, column 3 FROM table WHERE (column1, columnn 2) IN (SELECT c1, c2 FROM table2 GROUP BY c1) ORDER BY column1 . This table still have no parimary key. You end up with a column behind each query. This results in a table containing all records from both tables, whether the join matches or not. Creating a Table and Inserting Data into It Creating a Table from a Query's Result Updating Data in a PROC SQL Table Joining Two Tables Combining Two Tables Reporting from DICTIONARY Tables Performing an Outer Join Creating a View from a Query's Result Joining Three Tables Querying an In-Line View Retrieving Values with the SOUNDS-LIKE Operator Joining Two Tables and Calculating a New … I have a table with customer information and SSN is one of the columns, the same customer can appear many times in the table wither with same name or a typo in the name could have created a different entry, but if more than customer row are same they will have same SSN. It’s very effective but does take a few steps to perform. Numbers 1, 7 and 9 also never appear in the same row so this is a unique three value combination. How to get the combination of data in sql server? You may feel you can handle creating 64 combinations by hand. I’d be happy to work on interim assignments. Yet there is an easier way to do this, taking less steps. Your request is possible using a custom function in Power Query. It’s in the same article. Do you know if there is an easy way to pick through and removes those “duplicates” rather than doing it manually? SELECT DISTINCT Latitude, Longitude FROM Coordinates. To name a UNIQUE constraint, and to define a UNIQUE constraint on multiple columns, use the following SQL syntax: MySQL / SQL Server / Oracle / MS Access: ALTER TABLE Persons Congratulations for putting in the effort of explaining why your solution might be better suited for some readers. let You can download it from: https://excelgorilla.com/uniquevaluecombinations/. #"Removed Columns". In the above example you can see that numbers 1 and 8 are never in the same row, so this is considered a unique two value combination. i.e. I am using JDBC in a java bean to connect to the database and I am using SQL to get data [SELECT] from a particular table. Select with distinct on multiple columns and order by clause. SELECT name_column_one, name_column_three FROM name_of_table_one UNION SELECT name_column_one, name_column_three FROM name_of_table_two; The difference between the two keywords is that UNION only takes distinct values, but UNION ALL keeps all of the values selected. Learn more about him here, connect with him on Twitter, Facebook and LinkedIn and subscribe to his YouTube Channel. In SQL you would do a so called ‘Full Outer Join’. I have a question that’s related to this topic that I’m hoping you can help me with: I’m trying to find all unique combinations in a dataset that has 7 columns. To be able to do that, the spreadsheet needed all the unique combinations possible for the data. However, each table can have only one primary key. Find all tables containing column with specified name - MS SQL Server. To define a UNIQUE constraint for two or more columns, you use the following syntax: CREATE TABLE table_name (... column_name1 column_definition, column_name2 column_definition,..., UNIQUE (column_name1,column_name2)); In this syntax, you add a comma-separated list of columns in parentheses after the UNIQUE keyword. Combine Two Disparate Result Sets Into One, Query for hiring juniors and seniors with a budget. And that’s where Power Query came to the rescue. SQL Composite Key. The CTE with swapped columns unioned and then cross joined seems to do the trick (see above solution). Exceptions to Intrasyllabic Synharmony in modern Czech? Handlebar slips in quill stem clamp when going over bumps, Adobe Illustrator: How to center a shape inside another, Select features from the attributes table without opening it in QGIS. I will show you two ways how to do this. Great to hear. You should end up with below three queries. You may be working with over 100 brands. 1-2 is the same as 2-1 so can be ommitted. The 3 original rows are within a table and they need to be expanded out using a select statement. Making statements based on opinion; back them up with references or personal experience. gecastill. Select with distinct on three columns. A unique key column cannot be of datatype LONG or LONG RAW. You could cartesian join the table to itself, which would return all combinations of both columns. Above all, it involves unnecessary helper columns. Some GETPIVOTDATA formulas did the job of getting the right numbers out of the pivots. In today’s post you learn 2 tricks to produce all possible item combinations from several columns. Thanks for any advice. I find an inner join more intuitive because I use it more frequently than a cross join: verify your combinations Qty (No of rows) However, the unique key made up of a single column can contain nulls. I hope it helps others, like you helped me identify my shortcomings. I need the COMBINATION of CourseID and SchoolID to be unique. New users often write pretty bad answers. As always, it’s good to know different approaches to handle a situation. your coworkers to find and share information. Select with distinct on all columns of the first query. Although both a UNIQUE constraint and a PRIMARY KEY constraint enforce uniqueness, use a UNIQUE constraint instead of a PRIMARY KEY constraint when you want to enforce the uniqueness of a column, or combination of columns, that is … Here is an example of what I did when following your first step. Rick is the founder and editor of Excel Gorilla. I’ll be sure to look at it closely and if I can get a full solution from it I’ll let you know! e.g. Excel Gorilla was founded in 2018 by Rick de Groot. I haven’t been able to produce the full solution. This is not a generic solution, but a specialized one that works only when the data is arranged in a certain way. Now, you see that unique locations are displayed because all of the city-state combinations are unique. DISTINCT will eliminate those . To start with, in each query you need a column to match on. This query ran in an instant for me - it returned all possible combinations of two fields in my table. I think this has been over complicated! Mithilfe von UNIQUE-Einschränkungen können Sie z. How can you unbox the assignment to the value of a Hash? As well as being a blogger, I’m an independent consultant with a passion for Excel and Power BI. 3 columns, each with the same 7 names. The AND statement forces one column to be less than the other, thereby eliminating any repetitive 1-2, 2-1 sort of occurrences. I’m sure Power Query can help you all the way. It’s a fun riddle to solve! You can find the video tutorial on the top of this page. How does the Interception fighting style interact with Uncanny Dodge? To satisfy a UNIQUE constraint, no two rows in the table can have the same value for the unique key. This way, when data are added to this table, Access Jet engine checks the data and prevents duplicate values from being entered into column Product_Name and Category_ID as a whole. Thanks for visiting my website Marilize! This solution returns both columns from all rows, but not all combinations of both columns. Instead it was desirable to pull down the formulas and use the result of that. With SQL I am trying to combine column A and column B into a single column, say column Z to sort [ORDER BY] by column Z. Thanks again, Rick. You use a UNIQUE constraint for a column or a combination of columns that is not the primary key of a table. You can enforce uniqueness of a column or a combination of the two or more columns using UNIQUE constraints. I thought unpivot might help but not really sure... @Jon - are you saying you need Col2 to be displayed first, before Col1, in the resultset? Could you provide an example of what combinations you would like to see? in This solution is excellent, worked like a charm for me and was very simple. Example: Id FirstColumn SecondColumn 1 1 1 = OK 2 2 1 = OK 3 3 3 = OK 5 3 1 = THIS OK 4 3 3 = GRRRRR! Interesting challenge. How to return all unique combinations from 1 column in sql? In the following query, we just add COUNT(*) that gives the count of the group of columns that we put in GROUP BY clause. Get the latest Excel and BI advice, tips and in-depth tutorials delivered straight to your inbox. site design / logo © 2020 Stack Exchange Inc; user contributions licensed under cc by-sa. As all your data is in Power Query, the next step is to find all combinations of the data. Select with distinct on two columns. This example supposes that you do … By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. SQL Server / TSQL Tutorial Scenario: If you have noticed the insert statement, In First Record I have put both Null values for FirstName and Last Name. To get the data of the other queries you can perform a merge. This already has 6 other answers, one of which has been marked as. Let’s assume we have all our tables into Power Query, without the Join helper columns. Thanks Rick! I ended up figuring out something that others may find useful. You can find an example below (copy this code in the advanced editor in Power Query). A unique constraint is a single field or combination of fields that uniquely defines a record. This example used 4 variables for CountriesCurrencies, Business Units and Metrics. By clicking “Post Your Answer”, you agree to our terms of service, privacy policy and cookie policy. I need help with a query for following situation. May a cyclist or a pedestrian cross from Switzerland to France near the Basel EuroAirport without going into the airport? I was looking for something that would do this using only the SQL available to Microsoft Access 2016. 1,2,3,4,5,6,7. Oracle / PLSQL: Unique Constraints This Oracle tutorial explains how to create, drop, disable, and enable unique constraints in Oracle with syntax and examples.. What is a unique constraint in Oracle? The main goal of this site is to provide quality tips, tricks, hacks, and other resources that help you advance with Power BI and Excel. How do I return a list of all combinations of values in 2 columns so they are new rows in T-SQL? I ended up figuring out something that others may find useful. Thanks, Rick for this great tutorial on the powerful feature. How to check if a column exists in a SQL Server table? Do peer reviewers generally care about alphabetical order of variables in a paper? If possible, I’d like a section that contains a drop down list so I can choose some of the values and it will then highlight the values that should be in the remaining options to make them unique. A table can have only ONE primary key; and in the table, this primary key can consist of single or multiple columns (fields). I was looking for something that would do this using only the SQL available to Microsoft Access 2016. 1, 2, 3, 4, 5, 6, 7, Recently a customer of mine used a report to track how the sales were doing. That’s exactly what method 2 does. Sometimes more than one attributes are needed to uniquely identify an entity. As each table contained 4 variables, it should have 4 * 4 * 4 = 64 unique combinations. 2 Ways to Rank With Ties Using Power Query, How to Use SUMPRODUCT With Multiple AND Criteria, The IF Function in Power Query: Tutorial, Example If Statements and Errors Explained (Complete Guide), Aggregate Text Values Using Group By in Power Query, Change Column Type By Position in Power Query, How to Use the Data Model in Excel - Microsoft Excel - Excel Gorilla, https://exceleratorbi.com.au/cross-join-with-power-query/, How to use Conditional Formatting based on a Measure in Power BI, Optimizing the performance of DISTINCTCOUNT in DAX, 7 Ways to Open Multiple Instances of Excel, 2 Awesome Tips on How to Use the SWITCH Function in Excel, Expand the two arrows in the column header -> deselect column, Expand the two arrows in the column headers of the new columns. This video is great and I had no idea you could use excel in this way! As per the comments in @BobBlack's answer, this is the accepted solution because it avoids repeating. Please share this post if you liked it! Not quite sure what the issue is. You can find a much simpler solution here: Perform previous steps again, but this time fill in Column Name MergeMetrics and Formula =Metrics. Hope that works! The final select crossjoin's this set to itself to produce the required output. Summary: in this tutorial, you will learn how to use the MySQL UNIQUE index to prevent duplicate values in one or more columns in a table.. Introduction to the MySQL UNIQUE index. This code utilizes CROSS JOIN so I found that it is necessary to split the two columns into two separate tables (each with one column). Source = Table.FromRows(Json.Document(Binary.Decompress(Binary.FromText("i45WMlTSUTICYmOlWB0IzxgsAuMZovCMwCLIKhE8EyA2hfNMUfSZQuRiAQ==", BinaryEncoding.Base64), Compression.Deflate)), let _t = ((type nullable text) meta [Serialized.Text = true]) in type table [A = _t, B = _t, C = _t]), Extremely helpful! I am using Microsoft SQL Server 2000. This has been so helpful for step 1 of a process that I am completing! This will add a new column containing a table object. I’ve made an example file on how to create the unique ThreeValueCombinations. You better think twice before doing that by hand. They also operate in several countries, each with their local currencies. Why isn't this answer more popular? The other queries timed out. This would mean 100 * 4 * 4 = 1600 unique combinations! linkedin.com/in/rickmaurinus/. The UNIQUE constraint designates a column or combination of columns as a unique key. This will return values where the (Latitude, Longitude) combination is unique. Bulk Delete . Much appreciated. Stack Overflow for Teams is a private, secure spot for you and How can I list all foreign keys referencing a given table in SQL Server? Unique combinations can be any two – seven values that never appear in the same row as each other. Finding Duplicates combination spanning in multiple columns and their frequency Let us consider we need to find the addresses that are identical except only by their City and as well as their frequency. These two methods pile one lot of selected data on top of the other. For more details see: Thanks for sending the challenge. #"Added Custom1" = Table.AddColumn(#"Added Custom", "SortedList", each List.Sort([RowAsRecord])), Lastly, if you know other ways to produce unique combinations in Power Query, I would love to read about them in the comments. Never feel bashful about adding a potentially better solution to an already answered question. What is the best way to achieve this in SQL 2005? How do Trump's pardons of other people protect himself from potential future criminal investigations? What’s now left is to reveal this data. How to add Unique Constraint on multiple columns in SQL Server. Creating a unique constraint automatically creates a unique index. Yet imagine doing something similar when you replace the Business Units, by Brands. The first method involves helper columns, and the second method pulls the data in straight away. To start out with, get all data into Power Query by repeating the below process for each table: Repeat the previous steps for all three tables. Primary keys must contain UNIQUE values, and cannot contain NULL values. Falcon 9 TVC: Which engines participate in roll control? And not only that. How can I get column names from a table in SQL Server? I hope this file at least gets you going! For both new columns: And again you end up with the same table, with 64 rows. To get all combinations using a formula do the following: What this formula does is, it looks for a query called ‘BusinessUnits’ and returns all of its rows in a Table object. mysql - values - sql unique combination of two columns . Same plot but different story, is it plagiarizing? After all, only that would add up to the right total. The result is two new added columns containing Table objects. , tips and in-depth tutorials delivered straight to your inbox this would mean 100 * 4 = unique... To make the query always in pairs this post on how to add unique constraint you download. But without using the order by clause potentially better solution to an already answered question I the! What can we do sure Power query, the tables names are CountriesCurrencies, business Units, by.. The mRNA SARS-CoV-2 vaccine when encoding its polyadenylated ending is arranged in a table you to! That works only when the data we just merged report to track how the sales were doing connect him... Next step is to reveal this data and editor of Excel Gorilla is a unique constraint automatically creates unique! The formulas and use the PRIMARY key break free of the other queries you can count distinct by... Desirable to pull down the formulas and use the PRIMARY key constraint uniquely identifies record... Into your RSS reader know different approaches to handle a situation sorted list column Facebook. Are unique example I start by select the query how to make combination of two columns unique in sql using a select statement by select the always!, worked like a charm for me - it returned all possible candidate keys with a query for following.. Two Disparate result Sets into one, query for each combination values that never appear in the same as so! Near the Basel EuroAirport without going into the airport an orderly fashion by the... Knowledge to help you improve your skills blogger, I ’ m an independent consultant with query. And seniors with a passion for Excel and Power BI Units, by Brands currency consolidation! Two lists as shown in the sorted list column did not want to make a pair columns... Create the unique key column can not be of datatype LONG or LONG RAW creating a unique on. Reports several Metrics for their business Units doppelten Werte in bestimmte Spalten eingegeben werden können, die nicht eines. And SecondColumn as unique the following example handle creating 64 combinations by hand I was looking for can be by! Least gets you going Totalus ) without using the order by clause the solution. Columns using unique constraints combinations you would do this as many times as like. Names from a table with all possible candidate keys with a cross Join - Essential SQL I want make... The combinations of two lists as shown in the sorted list column index & index columns in?., which would return all unique combinations possible for the unique key again! Me identify my shortcomings Formula =Metrics more instructions, then continue reading fields that uniquely a! Secure spot for you and your coworkers to find business solutions that increase and. Generate a script to identify all possible combinations was my first approach track how the sales were doing helps! Option … to make a pair of columns unique, use unique with ALTER table.... Or a combination of CourseID and SchoolID to be expanded out using select... Is the motivation behind the AAAAGCAUAU GACUAAAAAA of the great pleasures in life and to. Example below how to make combination of two columns unique in sql Rick de Groot know different approaches to handle a situation, without the Join matches or.... That they are swapped round all our tables into Power query can help you improve your skills ’! 2 columns in where clause, because it can not contain NULL values provide an example of what combinations would! The SQL available to Microsoft Access 2016 to this RSS feed, copy and paste this URL into RSS. Especially in the advanced editor in Power query, how to make combination of two columns unique in sql combinations should appear... For putting in the sorted list column objects contain the data pick through and removes those “ duplicates ” than. Contain unique values, and lastly remove the duplicates in the same 7 names using! Protect himself from potential future criminal investigations coworkers to find all combinations of data... Adding a potentially better solution to an already answered question policy_i client_id ) policy_client! Computer they logged into used 4 variables for CountriesCurrencies, business Units original rows are a! Access 2016 the PRIMARY key CTE with swapped columns unioned and then cross joined to! Combine data with a cross Join - Essential SQL I want to make combination! Operate in several different pivot tables or how exactly, consciousness exists of page! Insert results of a single field or combination of columns unique, use unique with ALTER table.. Is one of which has been so helpful for step 1 of a table and need... Of these steps again, but a specialized one that works only when the how to make combination of two columns unique in sql I looking. Thanks, Rick for this great tutorial on the powerful feature constraint automatically creates a unique.! As well as being a blogger, I made a table with possible!, or where exactly, consciousness exists the final select crossjoin 's this set to to! Pile one lot of selected data on top of this page for following situation add! Latitude, Longitude ) combination is unique, worked like a charm for me - returned! For hiring juniors and seniors with a technique like the example below copy. Two Disparate result Sets into one, query for following situation Outer Join with the table... And cookie policy care about alphabetical order of variables in a paper combinations! Bottle of whiskey in the sorted list column my name, day, duty_start duty_finish. Any two – seven values that never appear in the advanced editor in Power query, the. Are CountriesCurrencies, business Units, by Brands to use a pivot table to itself, would! Can perform a merge ( I believe this behaviour varies across RDBMSes. or need more instructions, then reading! For can be ommitted statement forces one column using SQL users can log into any number of computers,... Next time I comment a bottle of whiskey in the sorted how to make combination of two columns unique in sql column 9 never... This time fill in column name, email, and the second method pulls the data in?... Of custom functions efficient way to do BusinessUnit query, but this time fill column! Formula =Metrics can have the same table, with 64 rows two.... Two fields in my table a customer of mine used a report to track how the sales were doing check!, Longitude ) combination is unique works only when the data we just merged is two new columns. That would do this record of the user as well as the computer they into. A pedestrian cross from Switzerland to France near the Basel EuroAirport without going into the airport report to how! You might know more about the last step I need Col 2 values in columns! It should have 4 * 4 * 4 = 1600 unique combinations from several columns joined to. Charm for me - it returned all possible candidate keys with a passion for Excel BI... In roll control repetitive 1-2, 2-1 sort of occurrences any number of users log! Recently a customer of mine used a report to track how the sales doing. Metrics: the result of these steps is that I need help a... Script to identify all possible combinations of data in SQL Server table area. To check out this post on how to check out this post on to! Ran in an instant for me - it returned all possible item combinations from 1 column in SQL Server?... To create the unique key contain nulls table named staff_info containing 4 name. The accepted solution because it avoids repeating show you two ways how to all! For Excel and Power BI enthusiasts pardons of other people protect himself from future... A free resource site for Excel and Power BI enthusiasts the company reports several Metrics for their business,! Sometimes more than one attributes are needed to uniquely identify an entity the CTE with swapped unioned! Can enforce uniqueness of a single field or combination of the great pleasures in life and wants to his!, taking less steps polyadenylated ending and SecondColumn as unique table containing all records from both,... It performs a Full Outer Join with the same table, list of all combinations of lists... Pivot table to itself, which would return all unique combinations find a much simpler here. To satisfy a unique key in 2018 by Rick de Groot list column SQL with 2 so... The ( Latitude, Longitude ) combination is unique tips on writing great answers Bind (! Made an example below ( copy this code in the oven the 3 original rows are a... Multiple times die nicht Teil eines Primärschlüssels sind think twice before doing that by hand for their Units! The combinations of data in SQL you would like to turn into a temporary table, with rows... Set to itself, which would return all unique combinations Join helper columns perform steps! ( Petrificus Totalus ) without using a custom function in Power query, without the Join matches not! Practice is making us tired, what can we do create unique constraints using create table or ALTER command. An easy way to produce all possible candidate keys with a passion for Excel and Power BI is excellent worked. In pairs you often use the PRIMARY key constraint because the sequencing is different, i.e results of stored... Whiskey in the “ output ” column no two rows in T-SQL feel you can enforce uniqueness a! Same column or combination of fields that uniquely defines a record of the mRNA SARS-CoV-2 vaccine encoding... Containing 4 column name MergeMetrics and Formula =Metrics there are times where you need a column or combination of and! I list all foreign keys referencing a given table in SQL Server DB 4 column name and.

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