而手动枢转转换为自动枢轴没有得到任何值

Question

我有一个存储过程对于在执行这个我确切出越来越手动枢转

ALTER procedure [dbo].[performancepivot] (
    @startdate datetime, 
    @enddate datetime 
) as begin 

    set nocount on 
    declare @date1 nvarchar(100)=convert(varchar, @startdate+'00:00:00.000',120), 
      @date2 nvarchar(100)= convert(varchar, @enddate+'23:59:59.000',120); 

    with cte as (select l.LocName, v.Vtype,sum(datediff(mi, t.DelDate, t.Paydate)) as TotalDiff, 
      dbo.testfunctionstacknew(convert(decimal(10,1),avg(convert(numeric(18,2), datediff(ss, t.Paydate, t.DelDate))))) as Average 
     from Transaction_tbl as t 
      left join VType_tbl as v on t.vtid = v.vtid 
      left join Location_tbl as l on t.Locid = l.Locid 
     where t.Locid in (select t1.Locid from Transaction_tbl as t1) 
      and t.dtime between @date1 and @date2 
      and t.Status = 5 
     group by v.Vtype, l.LocName, l.Locid) 

    select c.LocName, 
     max(case when c.Vtype = 'Normal' then Average end) as Normal, 
     max(case when c.Vtype = 'Vip' then Average end) as Vip, 
     max(case when c.Vtype = 'VVip' then Average end) as VVip, 
     max(case when c.Vtype = 'Pass' then Average end) as Pass, 
     max(case when c.Vtype = 'Staff' then Average end) as Staff 
    from cte as c group by c.LocName order by c.LocName 
end 

put..i不想枢轴manually..so我尝试写存储过程“自动旋转” .. 我试着写存储过程是这样的：

ALTER procedure [dbo].[ParkingSummary1] 
    @startdate nvarchar(100), @enddate nvarchar(100) as 
    begin 
     declare @date1 nvarchar(100) = convert(varchar, @startdate+' 00:00:00.000', 120) 
     declare @date2 nvarchar(100) = convert(varchar, @enddate+' 23:59:59.000', 120) 
     DECLARE @cols AS NVARCHAR(MAX),@query AS NVARCHAR(MAX) 
     select @cols = STUFF((SELECT distinct ',' + QUOTENAME(Vtype) from VType_tbl 
     FOR XML PATH(''), TYPE).value('.', 'NVARCHAR(MAX)') ,1,1,'') 
     set @query = 'SELECT LocName, ' + @cols + ' from (select l.LocName,Vtype from Transaction_tbl t join VType_tbl v on t.vtid = v.vtid join dbo.Location_tbl l on t.locid=l.Locid where dtime between '''+ @date1 +''' and '''+ @date2 +''' 
     and Status = 5) d pivot (count(Vtype) for Vtype in (' + @cols + ')) p ' 
     print @query 
    end 

但在执行此存储过程我没有得到任何value..i知道什么毛病此存储过程 WH在我的第二个存储过程错误..如果任何人知道请帮我找出

Answer 1

正如你所写，你的存储过程不会执行它建立的动态SQL查询。请更换print @query，或只是追加，下面的语句：

EXECUTE (@query); 

或者这一个：

EXECUTE sp_executesql @query; 

欲了解更多信息，请参见：

• EXECUTE (Transact-SQL)

• sp_executesql (Transact-SQL)