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 ...

There was a known problem when MySQL Connector JDBC Driver returned duplicated information about the foreign keys. This issue has been closed as fixed in the version 8.0.26. I was still able to ...