mysql查询结果添加序列号
第一种方法：
select (@i:=@i+1) as i,table_name.* from table_name,(select @i:=0) as it
第二种方法：
set @rownum=0;
select @rownum:=@rownum+1 as rownum, t.username from auth_user t limit 1,5;
Sql代码
- SELECT
- --COUNT(*) AS '数量' ,
- row_number() over (order by a.EMPNAME) as '序号',
- (SELECT top 1
- a.EMPNAME AS '姓名'
- FROM PT_PREHIREEMP_DETAILS a
- INNER JOIN PT_PREHIREEMP_MAIN b
- ON a.ORGCODE = b.ORGCODE
- WHERE a.RPTDATE BETWEEN '2016-01-05 00:00:00.000'AND '2016-01-05 18:00:00.000'
- AND b.LETTERSEQ = '20150076'
- AND a.ORGCODE = '150401' ORDER BY a.EMPNAME) AS '名字',
- a.EMPNAME AS '姓名',
- a.GENDER AS '性别',
- a.UNIT,
- a.IDENTITYNO AS '身份证号',
- a.INGRUOPMETHOD AS '进入本企业方式',
- a.REMARK AS '备注',
- b.LETTERSEQ AS '编号',
- (SELECT CONVERT(DATE,a.RPTDATE,120)) AS '填报时间'
- FROM PT_PREHIREEMP_DETAILS a
- INNER JOIN PT_PREHIREEMP_MAIN b
- ON a.ORGCODE = b.ORGCODE
- WHERE a.RPTDATE BETWEEN '2016-01-05 00:00:00.000'AND '2016-01-05 18:00:00.000'
- AND b.LETTERSEQ = '20150076'
- AND a.ORGCODE = '150401' GROUP BY a.EMPNAME,a.EMPNAME,a.GENDER,a.UNIT,a.IDENTITYNO,a.INGRUOPMETHOD,a.REMARK,b.LETTERSEQ ,a.RPTDATE;
查询结果如下：
一，详解：
Sql代码
- row_number() over (order by a.EMPNAME) as '序号'；//给查询的条数做序号
top 1得到第一条记录。以前做的分页查询的效果就是这个top，可以得到m n直接的记录。
二.集合查询总条数
select count(*) from ( select a,b from table where ...) a
注意集合后面必须要有a,这是给集合添加一个别名。
也可以使用下面方法查询总条数：
Sql代码
- select
- (SELECT TOP 1 (row_number() over (order by a.EMPNAME)) FROM PT_PREHIREEMP_DETAILS a
- INNER JOIN PT_PREHIREEMP_MAIN b
- ON a.ORGCODE = b.ORGCODE
- WHERE b.LETTERSEQ = '20150076' GROUP BY a.EMPNAME ORDER BY row_number() over (order by a.EMPNAME) DESC) AS '总数'
- FROM PT_PREHIREEMP_DETAILS a
- INNER JOIN PT_PREHIREEMP_MAIN b
- ON a.ORGCODE = b.ORGCODE
- WHERE b.LETTERSEQ = '20150076' GROUP BY a.EMPNAME
解释：
top 1 得到一个数，ORDER BY row_number() over (order by a.EMPNAME) DESC) 把序号按照EMPNAME倒叙排列
注意：上面基本能把效果做出来，但是效率没有测试，优化查询待续......
参考：http://435727748.iteye.com/blog/2306903