DELETE statement removes one or more records from a table. A subset may be defined for deletion using a condition, otherwise all records are removed. Delete second page of pdf rows that match the WHERE condition will be removed from the table.
If the WHERE clause is omitted, all rows in the table are removed. The DELETE statement should thus be used with caution. Executing a DELETE statement can cause triggers to run that can cause deletes in other tables. For example, if two tables are linked by a foreign key and rows in the referenced table are deleted, then it is common that rows in the referencing table would also have to be deleted to maintain referential integrity.
Delete rows in trees, if the value of height is smaller than 80. Suppose there is a simple database that lists people and addresses. The pa table relates the person and address tables, showing that Joe, Bob and Ann all live at 2001 Main Street, but Joe also takes up residence on Pico Boulevard.