mysql 8上的聚合查询
我有两张桌子,津贴和薪水 津贴表看起来像mysql 8上的聚合查询,mysql,mysql-8.0,Mysql,Mysql 8.0,我有两张桌子,津贴和薪水 津贴表看起来像 Id Title value 1 Transport 2000 2 Housing 1000 3 Housing 1000 工资表 id Salary 1 2000 2 1000 3 3000 对于没有住房补贴的身份证,住房的价值应视为0,仅显示工资。如果有住房补贴,把工资和住房加起来 我的查询没有给出正确的输出 SELECT s.id, C
Id Title value
1 Transport 2000
2 Housing 1000
3 Housing 1000
工资表
id Salary
1 2000
2 1000
3 3000
对于没有住房补贴的身份证,住房的价值应视为0,仅显示工资。如果有住房补贴,把工资和住房加起来
我的查询没有给出正确的输出
SELECT
s.id,
CASE
WHEN t.`Housing` = 0 THEN s.salary
END AS Salary,
CASE
WHEN t.`Housing` <> 0 THEN t.Housing + s.salary
WHEN t.`Housing` = 0 THEN s.salary
END AS SalaryAndHousing
FROM
(SELECT
id,
CASE
WHEN Title = 'Housing' THEN value
WHEN Title <> 'Housing' THEN 0
END AS 'Housing'
FROM
Allowance) t
JOIN
Salaries s ON (t.id = s.id);
应该是这样的,
id Salary SalaryAndHousing
1 2000 2000 -- 2000 + 0
2 1000 2000 -- 1000 + 1000
3 3000 4000 -- 1000 + 3000
这是一个非常简单的查询:
select
s.id,
s.Salary,
s.Salary + coalesce(a.value, 0) SalaryAndHousing
from Salaries s
left join Allowance a on a.id = s.id and a.Title = 'Housing'
order by s.id;
试穿一下谢谢,但我需要两列,而不是我想要的结果中显示的一列。是的。仅当t.
住房
=0时,才会打印刚刚更新的薪资-您肯定一直想要薪资。。
select
s.id,
s.Salary,
s.Salary + coalesce(a.value, 0) SalaryAndHousing
from Salaries s
left join Allowance a on a.id = s.id and a.Title = 'Housing'
order by s.id;