mysql的外鍵約束

InnoDB也支持外鍵約束。InnoDB中對外鍵約束定義的語法看起來以下：mysql [CONSTRAINT symbol] FOREIGN KEY [id] (index_col_name, ...)     REFERENCES tbl_name (index_col_name, ...)     [ON DELETE {RESTRICT | | SET NULL | NO ACTION}]

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