SQL - Find Duplicate Records
The article describes how to find duplicate records in a table with SQL.
General syntax for the SQL query for finding duplicated rows in a table is:
SELECT [field_name], COUNT([field_name])
FROM [table_name]
GROUP BY [field_name]
HAVING (COUNT([field_name]) > 1)
For example, if we want to find duplicate records with SQL in Students table based on a student's name we could use: