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sqlserver分组取前n条记录

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Release: 2016-06-07 16:17:56
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1.前言。 这个有两种方法。1是用in,2是用row_number(),可根据情况来用。两种都可以。 2.举例。 方法1: Java代码 select a.* from table1 a where a.column1 in (select max(column1) from table1 group by a.column2,column3) 方法2: Java代码 with nyr as

   1.前言。

  这个有两种方法。1是用in,2是用row_number(),,可根据情况来用。两种都可以。

  2.举例。

  方法1:

  Java代码

  select a.* from table1 a where a.column1 in (select max(column1) from table1 group by a.column2,column3)

  方法2:

  Java代码

  with nyr as (

  select NYR,QYZX_DM,FXSP_XH,SPBM_DLJ,WBSP_GG,JGLX,JZJG,MAX(SJGX_SJ),

  ROW_NUMBER() over (partition by nyr order by nyr) as 'rowno'

  from WD_O_T_IC_SPSJ_FX

  where rowno=1

  group by NYR,QYZX_DM,FXSP_XH,SPBM_DLJ,WBSP_GG,JGLX,JZJG

  order by NYR,QYZX_DM,FXSP_XH,SPBM_DLJ,WBSP_GG,JGLX,MAX(SJGX_SJ) desc )

  select *

  from nyr

  where rowno = 1

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