一键删除数据库所有的外键约束-FOREIGN_KEYS

DECLARE @Esql VARCHAR(1000);
DECLARE FCursor CURSOR --定义游标
FOR (SELECT  "ALTER TABLE "+O.name+" DROP  CONSTRaiNT "+F.name+";"  AS  CommandSQL  from   SYS.FOREIGN_KEYS  F    
JOIN  SYS.ALL_OBJECTS  O  ON F.PARENT_OBJECT_ID = O.OBJECT_ID WHERE O.TYPE = "U" AND F.TYPE = "F") --查出需要的集合放到游标中
OPEN FCursor; --打开游标
FETCH NEXT FROM FCursor INTO @ESQL; --读取第一行数据
WHILE @@FETCH_STATUS = 0
  BEGIN
  exec(@ESQL);
 FETCH NEXT FROM FCursor INTO @ESQL; --读取下一行数据
 END
CLOSE FCursor; --关闭游标
DEALLOCATE FCursor; --释放游标
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