前言
答案
1.简单的update语句,需要注意的是员工表中的age和salary都是int型
UPDATE tbEmployee SET salary = salary + 200 WHERE age >= 40 AND salary < 2000; |
2.涉及多表查询及子查询,可能我的sql写的有点长
WITH emp AS ( SELECT tbD. NAME, tbE. ID FROM tbDepartmemtEmployee tbDE LEFT JOIN tbEmployee tbE ON tbDE.employeeId = tbE. ID LEFT JOIN tbDepartment tbD ON tbDE. ID = tbD. ID WHERE tbE.age >= 40 AND tbE.sqlary < 2000 ) SELECT emp. NAME, COUNT (emp. NAME) FROM emp GROUP BY emp. NAME ORDER BY COUNT (emp. NAME) DESC |
End.