SQL
Identify Duplicate Rows Based on Specific Columns
Discover and list all duplicate entries in a SQL table by checking for identical values across one or more specified columns for data integrity.
SELECT column1, column2, COUNT(*)
FROM your_table
GROUP BY column1, column2
HAVING COUNT(*) > 1;
How it works: This query groups rows based on the combination of `column1` and `column2`. The `HAVING COUNT(*) > 1` clause then filters these groups to show only those combinations that appear more than once, effectively identifying duplicate entries. Replace `your_table`, `column1`, and `column2` with your actual table and column names to find duplicates within your dataset.