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sql条件查询case语句

本文主要是介绍sql条件查询case语句，对大家解决编程问题具有一定的参考价值，需要的程序猿们随着小编来一起学习吧！

case语句

1、语法：select * ,
case
when then
end
from 表名；

--查询所有员工信息，添加一列，显示生肖
select *,
CASE
when year(PeopleBirth)%12=4 then '鼠'
when year(PeopleBirth)%12=5 then '牛'
when year(PeopleBirth)%12=6then '虎'
when year(PeopleBirth)%12=7 then '兔'
when year(PeopleBirth)%12=8 then '龙'
when year(PeopleBirth)%12=9 then '蛇'
when year(PeopleBirth)%12=10 then '马'
when year(PeopleBirth)%12=11 then '羊'
when year(PeopleBirth)%12=12 then '猴'
when year(PeopleBirth)%12=1 then '鸡'
when year(PeopleBirth)%12=2 then '狗'
when year(PeopleBirth)%12=3 then '猪'
 else ''
end 生肖
from people
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