Question

我想写这样的代码：

select col1,col2,col3,col4
from x
where ----
order by all

更多细节：我使用Sp_executesql从数据库动态获取我的列以执行我的SQL语句，我不知道返回列的数量是多少，我想通过所有这些动态列对这些列进行排序

这是我的代码：

ALTER PROCEDURE [dbo].[SP_Get_Trx_Log_details] 
  -- Add the parameters for the stored procedure here   
  @thread_id INT, 
  @frd_id_BU VARCHAR(max), 
  @and_cond  VARCHAR(max)

AS 
  BEGIN 
      DECLARE @tbl_name NVARCHAR(300) 
      DECLARE @type NVARCHAR(10) 
      SELECT @type = Upper(thread_type) 
      FROM   dbo.tbl_frd_threads 
      WHERE  thread_id = @thread_id 

      IF( ( @type = 'M' 
             OR @type = 'Q' 
             OR @thread_id = 50 ) 
          AND @thread_id <> 49 ) 
        BEGIN 

            SET @tbl_name = 'dbo.tbl_frd_details_member_qa det LEFT JOIN dbo.tbl_frd_actions act  ON det.frd_det_id = act.frd_id AND det.thread_id = act.thread_id AND act.action_type = ''C''  '
        END 
      ELSE IF ( ( @type = 'P' 
              OR @thread_id = 49 ) 
           AND @thread_id <> 50 ) 
        BEGIN 

            SET @tbl_name = 'dbo.tbl_frd_details_provider det LEFT JOIN dbo.tbl_frd_actions act  ON det.frd_det_id = act.frd_id AND det.thread_id = act.thread_id AND act.action_type = ''C''  '
        END 

      IF ( @thread_id = 1000 ) -- JOIN details tbl with action tbl 
        BEGIN 
            SET @tbl_name = 'dbo.tbl_frd_details_member_qa det LEFT JOIN dbo.tbl_frd_actions act  ON det.frd_det_id = act.frd_id AND det.thread_id = act.thread_id AND det.action_type = act.actions  AND act.action_type = ''C''    '--  AND convert(datetime,act.action_date)  = '''+Convert(varchar(50),@action_date)+''''
        END 

    DECLARE @SelectStmt AS NVARCHAR(max) 
    DECLARE @SelectColumns AS NVARCHAR(max) 

    SELECT @SelectColumns = trx_log_cols 
    FROM   tbl_frd_threads 
    WHERE  thread_id = @thread_id 
           AND Isnull(trx_log_cols, '-1') != '-1' 
           AND trx_log_cols != '' 

    SET @SelectStmt = 'SELECT * FROM ( SELECT  Distinct' + isnull(@SelectColumns ,'-1')+ ' FROM ' 
                      + @tbl_name + ' WHERE   det.frd_id =''' 
                      + @frd_id_BU + '''    ' + @and_cond +') A'
                      + ' ORDER BY A.[Action Date] , 2,3,5,7'
    -- Here I don't know the number of returned columns BUT I need to sort the returned columns by all columns or by odded number 

    EXEC Sp_executesql  @SelectStmt 
END

清楚？

由于

Answer 1

我仍然不知道，如果我明白你在问什么或不知道。如果要按列的顺序排序行，即先按第一列，然后按第二列，依此类推，那么haytem在一小时前就在评论部分给出了答案：完全构建ORDER BY子句与构建SELECT子句的方式相同。

SET @SelectStmt = 'SELECT * FROM ( SELECT  Distinct' + isnull(@SelectColumns ,'-1')
                  + ' FROM ' + @tbl_name 
                  + ' WHERE   det.frd_id =''' + @frd_id_BU + '''    ' + @and_cond +') A'
                  + ' ORDER BY ' + isnull(@SelectColumns ,'1')

如果@SelectColumns中没有列，则选择-1并按1排序，即第一列和唯一列。

SQL：有没有办法使用order by子句对所有列的所有数据进行排序，例如：order by *

1 个答案: