Mysql-----case when then else end

例子1:

SELECT

`t1`.`id` AS `investid`,

`t1`.`borrowId` AS `borrowId`,

`t1`.`investor` AS `investor`,

`t1`.`investTime` AS `investTime`,

(

CASE `t2`.`isDayThe`

WHEN 2 THEN

0

ELSE

(

CASE (

(`t2`.`paymentMode` * 100) + `t2`.`deadline`

)

WHEN 201 THEN

(`t1`.`investAmount` / 3)

WHEN 202 THEN

((`t1`.`investAmount` * 2) / 3)

WHEN 401 THEN

(`t1`.`investAmount` / 3)

WHEN 402 THEN

((`t1`.`investAmount` * 2) / 3)

ELSE

`t1`.`investAmount`

END

)

END

) AS `facevalue`

FROM

(

`t_invest` `t1`,

`t_borrow` `t2`

)

WHERE

(

(`t1`.`borrowId` = `t2`.`id`)

AND (`t1`.`debtnum` = 0)

)

例子2：

select b.borrowTitle as '借款标题', b.annualRate as '年利率', b.deadline as '借款期限',

CASE WHEN b.isDayThe = 1 THEN '月标'

WHEN b.isDayThe = 2 THEN '天标' END '是否是天标'

,CASE WHEN b.paymentMode =1 THEN '等额本息'

WHEN b.paymentMode =2 THEN '先息后本'

WHEN b.paymentMode =4 THEN '一次性还本付息'

WHEN b.paymentMode =5 THEN '等额本金' END '还款方式'

,b.publishTime as '发布时间' from t_borrow b;