Question

我想将SQL查询更改为Laravel。但这会出错。请帮助如何更改此查询。

（此查询进行排名查询。）

select school_id, id, month, ifnull(avg,0) as avg, ifnull(sum,0) as sum, 
@rank := @rank +1 as rank from v2_rank_status as s, (select @rank :=0 ) as r 
where month ='201901' order by sum desc

Answer 1

使用前，您需要定义@rank；

DB::statement('SET @rank = 0'); //we start from 0 because the first query will have +1
DB::select('SELECT school_id, id, month, IFNULL(avg, 0) AS avg, IFNULL(sum,0) AS sum, @rank:=(@rank+1) AS rank FROM v2_rank_status WHERE month = ? order by sum desc', [
    '201901'
]);

这会将@rank设置为0，并以+1递增选择

SQL查询到Laravel查询

1 个答案: