CREATE TABLE 和 ALTER TABLE 语句的 REFERENCES 子句支持 ON DELETE 和 ON UPDATE 子句:
[ ON DELETE { CASCADE | NO ACTION } ]
[ ON UPDATE { CASCADE | NO ACTION } ]
ON DELETE CASCADE
ON UPDATE CASCADE
允许级联删除,更新,sql server2000支持
[ ON DELETE { CASCADE | NO ACTION } ]
[ ON UPDATE { CASCADE | NO ACTION } ]
ON DELETE CASCADE
ON UPDATE CASCADE
允许级联删除,更新,sql server2000支持
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