使用Row_number()OVER(partition BY ..)以及声明局部变量 [英] Using Row_number() OVER(partition BY..) along with declaring local variables

问题描述

我有一个sql查询，在此sql查询中，我想选择与众不同的列，而不考虑列在前.对于其他SQL查询，我使用Row_number()OVER(partition BY ..)，并且我还需要使用内部联接.我要在其中使用row_number和内部联接的查询是-

I have a sql query, in this sql query I want to select distinct columns irrespective of column first. For other sql query I use Row_number() OVER(partition BY..) and I also need to use inner join. The query in which I want to use row_number and inner join is -

DECLARE @columns NVARCHAR(MAX)

DECLARE @params NVARCHAR(MAX) = '@columns NVARCHAR(MAX) OUTPUT'

DECLARE @sql NVARCHAR(MAX) = 'SELECT @columns = STUFF(
(
    SELECT '',''+ [column_name] FROM information_schema.columns
    WHERE (table_schema = ''dbo''
          AND table_name = ''main_mps_dqs_analog'') 
          AND (ordinal_position <= 73) FOR XML PATH('''')),1,1,'''')'

EXEC sp_executesql @sql, @params, @columns OUTPUT

SET @sql = 'SELECT '+ @columns + ' FROM dbo.main_mps_dqs_analog WHERE logtime BETWEEN ''2014-10-10 07:17:00'' AND ''2014-10-10 08:47:00''' 

EXEC(@sql)

我想将此表的内部联接与INDUS2_BDS.dbo.ddtable一起使用，并且我希望此INDUS2数据库表的beam_current和logtime以及如何在此查询中应用分区BY beam_current.

I want to apply inner join of this table with INDUS2_BDS.dbo.ddtable and I want beam_current and logtime of this INDUS2 database table and how to apply partition BY beam_current in this query.

推荐答案

SET @sql = 'SELECT ' + @columns + ' ,AnotherTable.beam_current, RowNumber() Over(Partition By SomeColumn Order By SomeColumn) AS Rn
 FROM dbo.TableName join AnotherTable on TableName.SomeColumn = AnotherTable.SomeColumn
WHERE logtime BETWEEN ''2014-10-10 07:17:00'' AND ''2014-10-10 08:47:00'''

我在Giorgi的帮助下通过此sql查询解决了该问题

I solved it by this sql query with the help from Giorgi

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