Do you want to find out how to avoid duplicates in the results of a SQL SELECT query? This article will show you how. To avoid duplicate results: Simply use the DISTINCT clause and between the SELECT ...

A SELECT group of programmers with a DISTINCT advantage If you’re still with us, congratulate yourself—you survived the second part of our series on SQL basics!

How to Check for Duplicates Before Inserting Into SQL. When you insert new records into an SQL database, you may run into issues where you accidentally overwrite records that are already present ...

SELECT b.Id, COUNT (DISTINCT a.UserId) AS users FROM table1 AS a INNER JOIN table2 AS b ON a.Id = b.Id GROUP BY b.Id, a.OtherId HAVING (COUNT (DISTINCT a.UserId) > 1) ...