如下所示：
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//查詢表managefee_managefee的年year 和 month ,用concat函數(shù)拼成year-month。例如將2017和1 拼成2017-01。.select CONCAT(a.year,'-',if(a.month<=9,CONCAT('0',a.month),a.month))as date,a.* from managefee_managefee as a;//查詢managefee_managefee中時間段為2017-01到2017-07的數(shù)據(jù)select * from(select CONCAT(a.year,'-',if(a.month<=9,CONCAT('0',a.month),a.month))as date,a.* from managefee_managefee as a) bwhere b.date between '2017-01' and '2017-07'; |
以上這篇mysql函數(shù)拼接查詢concat函數(shù)的使用方法就是小編分享給大家的全部內(nèi)容了，希望能給大家一個參考，也希望大家多多支持服務(wù)器之家。
