Mysql trigger types

Cannot delete or update a parent row: a foreign key constraint fails. Estas en el tema de Duda sobre indices On delete no action on update no action en el foro de Mysql en Foros del Web. NO ACTION means that if any referencing rows still exist when the constraint is. Since a DELETE of a row from the referenced table or an UPDATE of a . Bài viết hướng dẫn cách sử dụng Foreign Key với Cascade Delete trong SQL Server. Có các lựa chọn NO ACTION , CASCADE, SET NULL và SET DEFAULT.

MYSQL 외래키(Foreign key) 지정 시 on delete rule(삭제 시), on update rule(변경 시) 옵션 지정 RESTRICT, CASCADE, NO ACTION , SET NULL . PRIMARY KEY – this constraint is the combination of NOT NULL and UNIQUE constraints. ON UPDATE NO ACTION ON DELETE NO ACTION ,. On Delete 属性 可能取值为： No Action , Cascade,Set Null, Restrict属性。 当取值为 No Action 或者Restrict时，则当在父表（即外键的来源表）中 . I am given the choice to Clean, Delete or No Action. I was just wondering if Hypersonic supported Cascade Delete and if so how do I set it up or where is something.