MySQl-获取各部门工资

Question

如何拿到每个部门前两名的薪资？表格看起来像:

-------------------------
name     dept      sal
-------------------------
name1    CSE       100000
name2    CSE       200000
name3    ECE       200000
name4    EEE       400000
name5    CSE       700000
name6    ECE       600000

Answer 1

第一部门

SELECT dept
FROM  `Table` 
WHERE dept = 'CSE'
ORDER BY sal DESC 
LIMIT 0 , 2

第二部门

SELECT dept
FROM  `Table` 
WHERE dept = 'ECE' 
ORDER BY sal DESC 
LIMIT 0 , 2

上述每个查询都会向您显示每个部门的前两个结果。

更新:

SELECT dept, sal
FROM  `tbl_practice` 
WHERE dept =  'CSE'
OR dept =  'ECE'
ORDER BY sal DESC 
LIMIT 0 , 4