This blog will help user learn how to avoid the duplicate entries in the database. Storing duplicate values in the table must be avoided while inserting data in the database table. As these duplicate ...

Sometimes we need to check how many duplicate values a column has in MySQL table. We can do this by using "group by" and "having". Example: Suppose you have a table "user" with "fist_name" column from ...

MySQL table primary keys and unique indexes prevent multiple rows with the same index from being added to the table. If you try to insert a duplicate row with a ...

Duplicate data is the bane of data management. Duplicate data items in the form of duplicate rows can cause confusion in data analysis that could result in severe consequences in business estimations ...

MySQL provides a powerful feature called "INSERT ON DUPLICATE UPDATE" that allows you to insert data into a table and update it if a duplicate record already exists. This feature can be very handy ...