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10 kwi 2011 · How can I use the DISTINCT clause with WHERE? For example: SELECT * FROM table WHERE DISTINCT email; -- email is a column name I want to select all columns from a table with distinct email addres...
SELECT key, (array_agg(value))[1] AS value FROM tableX GROUP BY key ; You can optionally order values inside array to select biggest or smallest of them: SELECT key, (array_agg(value) ORDER BY value DESC)[1] AS value FROM tableX GROUP BY key ; (checked on PostgreSQL)
This tutorial shows you how to use the SQL Server SELECT DISTINCT clause to retrieve the only distinct values in a specified list of columns.
5 kwi 2021 · In this article we look at how to retrieve a list of distinct datasets from SQL Server without repeating information using the DISTINCT clause.
1 sty 2011 · WHERE (SenderID = @UserID AND RecipientID = @OtherUserID) OR (SenderID = @OtherUserID AND RecipientID = @UserID) ORDER BY SendDate DESC. FETCH NEXT FROM idCursor INTO @OtherUserID. END. CLOSE idCursor. DEALLOCATE idCursor. SELECT * FROM #TempMessages ORDER BY SendDate DESC.
23 lut 2023 · Sometimes we only want to see a distinct (or unique) set of those duplicate values. This is where SELECT DISTINCT can be used. As its name implies, the DISTINCT keyword is commonly used in a SQL SELECT statement to return a distinct set of values.
24 wrz 2023 · If you’re not familiar already, SELECT DISTINCT is a handy tool in our SQL arsenal that helps to return unique values within a database column. Here’s how we can use it in its simplest form: SELECT DISTINCT column_name FROM table_name;
