mysql 排序並增加序號，分數相同並列
阿新 • • 發佈：2018-05-15
IT HERE group by count eve FN mit lec 1=1
1，排序，根據總分 增加序號
表結構：
sql：
SET @row=0;
SELECT b.*, @row:=@row+1 rownum FROM (
select *,SUM(a.achievement) as achievementAll from cp_cj as a
where 1=1 GROUP BY a.studentNum order by SUM(a.achievement) DESC limit 0,30
) as b
結果：
2，排序，根據總分 增加序號，並且按照總分相同的並列
sql：
select c.* ,ifnull((
select count(*) from
(
select *,SUM(a.achievement) as achievementAll from cp_cj as a
where 1=1 GROUP BY a.studentNum order by SUM(a.achievement) DESC
) as b
where c.achievementAll < b.achievementAll
),0)+1 as rownum from
(
select *,SUM(a.achievement) as achievementAll from cp_cj as a
where 1=1 GROUP BY a.studentNum order by SUM(a.achievement) DESC limit 0,30
) as c
結果：
mysql 排序並增加序號，分數相同並列