Monthly Archives: 1月 2020

You are browsing the site archives by month.

301月 2020

Mysql查询结果带行号

by 爱偷吃猫的鱼

SELECT @rowNum:=@rowNum + 1 AS ‘行号’,a.* FROM Teacher a,(SELECT @rowNum:=0) b;

121月 2020

tp5.1判断模型拿到的数据是否为空

by 爱偷吃猫的鱼

$mode= Db::name(‘news’)->select();

if ($mode->isEmpty()) {
error(‘error’);
}