mysql根据不同的条件对数据进行批量修改(navicat)

为财务部门的雇员加薪,5年以下加5%,5年以上加3%

UPDATE employee e,
 (
#筛选出财务部的员工信息，并作为临时表
	SELECT
		e.empid,
		e.sal,
		w.worktime
	FROM
		employee e,
		`work` w
	WHERE
		e.empid = w.empid
	AND w.deptno = (
#选出财务部的编号
		SELECT
			d.deptno
		FROM
			department d
		WHERE
			d.dname = '财务'
	)
) tp#临时表别名 tp
#使用CASE WHEN对信息批量修改
SET e.sal = CASE
WHEN tp.worktime >= 5 THEN
	e.sal * (1 + 0.05)
WHEN tp.worktime < 5 THEN
	e.sal * (1 + 0.03)
END
#修改时满足的条件
WHERE
	e.empid = tp.empid;