Finding duplicate values in a SQL Table

 

Finding duplicate values in a SQL Table

Assume you have a table named your_table with a column named your_column where you want to find duplicates.

SELECT your_column, COUNT(*)
FROM your_table
GROUP BY your_column
HAVING COUNT(*) > 1;

If you want to find duplicates based on multiple columns, you can modify the query like this:

SELECT column1, column2, COUNT(*)
FROM your_table
GROUP BY column1, column2
HAVING COUNT(*) > 1;