Skip to main content

List all foreign key in a database

To view all foreign key in a MySQL database, use below query.
select table_name, column_name, constraint_name, referenced_table_name, referenced_column_name from information_schema.key_column_usage where referenced_table_schema = '<databaseName>';

Comments

Popular posts from this blog

Identify the duplicates in MySQL

To identify the duplicate entries in MySQL, use below query.                      SELECT COUNT(*) as repetitions, group_concat(id, ' (', startTime, ', ', endTime, ') ' SEPARATOR ' | ') as row_data FROM GROUP BY startTime, endTime HAVING repetitions > 1 FYI, id, startTime and endTime columns should be changed based on your table schema. you can change the output format here like alias and the separator.

Exclude or Include table(s) during creating backup from MySQL

 To exclude tables when you are creating database backup from MySQL, execute below query. mysqldump -u root -p<Password> DATABASENAME --ignore-table= DATABASENAME.TABLENAME  > BACKUPFILENAME.sql  To include  tables when you are creating database backup from MySQL, execute below query. mysqldump -u root -p<Password> DATABASENAME TABLENAME1 TABLENAME2  > BACKUPFILENAME.sql Take note that there is no whitespace between -p and the password..