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mysql设置触发器问题
2022-07-05 06:33:00 【CSDN问答】
在考生文件夹下给出的企业数据库db_ emp中包含职工 表tb_ employee和部门 门表tb_ dept.
职工表有部门号(deptno) ,工资(salary) ,部门表有 部门]号(deptno) 、 部门名称(dname)
设计一个名称为t_ emp的触发器, 完成的功能是:当删除 部门表中的记录时,将职工表中的部门号(deptno) 置 空。并使用命令删除部门号(deptno) 为D2的行触发该触发器,并查看结果。
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