问一道SQL笔试题,谢谢!
题目如下:
CREATE TABLE table1(
FID int,//记录id
FName varchar(10),//员工姓名
FDate datetime,//日期
FSalary float//金额
)
表记录了公司内所有员工的薪水发放记录(注:薪水可能是按周发放,也可能是按月、按日发放),数据可能跨年。
(1)现要求得出名为“张三”的员工在本年所得薪水总和,请写出实现的sql语句
(2)现要求计算出每个员工的按年,月统计的薪水报表,请写出实现的sql语句
(3)现要求得出月薪水介于500-800的员工姓名(要求名字不重复,含500和800)
[解决办法]
-- JUST TRY IT ..-- 1:SELECT SUM(FSALARY) "SALARYS" FROM TABLE1 WHERE FNAME = '张三' AND TO_CHAR(FDATE,'YYYY')=TO_CHAR(SYSDATE,'YYYY'); -- 2:SELECT TO_CHAR(FDATE,'YYYY') "YEAR", TO_CHAR(FDATE,'YYYYMM') "MONTH", SUM(FSALARY) "SALARYS" FROM TABLE1 GROUP BY TO_CHAR(FDATE,'YYYY'),TO_CHAR(FDATE,'YYYYMM'); -- 3:SELECT DISTINCT FNAME FROM (SELECT FNAME, TO_CHAR(FDATE,'YYYY') "YEAR", TO_CHAR(FDATE,'YYYYMM') "MONTH", SUM(FSALARY) "SALARYS" FROM TABLE1 GROUP BY FNAME, TO_CHAR(FDATE,'YYYY'), TO_CHAR(FDATE,'YYYYMM') )TT WHERE SALARYS BETWEEN 500 AND 800;