SQL

Finding Duplicate Rows in a Table

Learn to identify and retrieve duplicate records in your SQL database based on one or more columns, essential for data cleansing and integrity checks.

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

How it works: This query groups rows based on the specified columns (`column1`, `column2`). The `COUNT(*)` function counts the number of occurrences for each group. The `HAVING` clause then filters these groups, showing only those where the count is greater than 1, indicating duplicate records for that combination of values.

Finding Duplicate Rows in a Table

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