SQL

cascade syntax in sql

DELETE Rules:
1. ON DELETE NO ACTION
2. ON DELETE CASCADE
3. ON DELETE SET NULL
4. ON DELETE SET DEFAULT

UPDATE Rules:
1. ON UPDATE NO ACTION
2. ON UPDATE CASCADE
3. ON UPDATE SET NULL
4. ON UPDATE SET DEFAULT

cascade syntax in sql

<COLUMN> <DATATYPE> <CONSTRAINT NAME> REFERENCES <MASTER TABLE
NAME> (<PRIMARY KEY COLUMN>)
ON DELETE {NO ACTION/CASCADE/SET NULL/ DEFAULT}
ON UPDATE {NO ACTION / CASCADE /SET NULL/ DEFAULT}