Mysql delete null

It specifies what to do with the child data when the parent data is updated. It means that no action is performed with the child data when the parent data is deleted or updated. It means that the child data is either deleted or updated when the parent data is deleted or updated.

It means that the child data is set to NULL when the parent data is deleted or updated. The following SQL statement deletes all rows in the "Customers" table, without deleting the table:.

Delete all the records from the Customers table where the Country value is 'Norway'. We just launched W3Schools videos. Get certified by completing a course today! MySQL - count duplicated rows. MySQL - delete all duplicated rows except one.

MySQL - delete row where column is empty string blank. MySQL - delete row where column is null. MySQL - duplicate table. MySQL - find all tables with specific column names. MySQL - find duplicated values. MySQL - find duplicated values in multiple columns. MySQL - find first row. MySQL - find row with null value in column.

MySQL - find row with null value in one of many columns. MySQL - find rows where column is empty string blank. MySQL - get difference between two columns. MySQL - how to check database size? Collectives on Stack Overflow. Learn more. Asked 7 years, 10 months ago.

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