将 DISTINCT 与 ORDER BY 子句一起使用

Question

我想改变我的以下存储过程

ALTER Procedure [dbo].[spEGCRedemptionReportForMHR]  

@DateTo datetime,
@DateFrom datetime,
@MerchantID varchar(11),
@Pan varchar(16)
As
Set @DateTo = @DateTo +1
Select Distinct
Convert(varchar(50),pt.TransactionDate,103) 'TransactionDate',
m.MerchantName1 MerchantName,
m.MerchantAddress Location,
m.MerchantID,
pt.TerminalID,
pt.batchnumber 'Batch #',
pt.SequenceNumber 'Receipt #',
pt.PAN 'Card Number',
c.EmbossName 'Card Holder Name',

Convert(Decimal(10,2),Case when pt.TransactionTypeID=2 then (pt.TotalAmount) end) As 'Points Redeemed',
Convert(Decimal(10,2),Case when pt.TransactionTypeID=2 then (((pt.TotalAmount)/(cc.usdconversionrate))/2) end) as 'Total Payment Amount (AED)', --/cc.USDConversionRate end) As 'Total Amount in AED',
Convert(Decimal(10,2),Case when pt.TransactionTypeID=2 then (((pt.TotalAmount)/(cc.usdconversionrate))/2) -15 end) as 'Total loaded Amount (AED)',
3.00 as 'Procco Share',
Convert(Decimal(10,2),Case when pt.TransactionTypeID=2 then (((pt.TotalAmount)/(cc.usdconversionrate))/2) - 3 end) as 'Settlement Amount'

from POS_Transactions pt
inner join Terminal t on t.TerminalID=pt.TerminalID
inner join Merchant m on m.MerchantID=t.MerchantID
inner join Card c on c.EmbossLine=pt.PAN
inner join Share s on s.MerchantID=m.MerchantID,Currency cc
where IsEmaar =1 and
cc.CurrencyCode='AED'
--and m.isemaarmerchant = 1
and (m.MerchantID=@MerchantID or @MerchantID='-999')
and (pt.TransactionDate>=@datefrom and pt.TransactionDate<=@dateto)
and (pt.PAN=@Pan or @Pan ='-999')
order by pt.TransactionDate

但是每次我尝试执行它时它都会抛出一个错误

ORDER BY items must appear in the select list if SELECT DISTINCT is specified.

我已经在我的 select 中使用了 pt.TransactionDate 但它仍然要求我包括它，因为它在我的 order by 条款中。我的查询可能有什么问题？

Answer 1

是的，pt.TransactionDate 列出现在 SELECT 中，但是在 CONVERT 函数内部，如下所示：

CONVERT(VARCHAR(50), pt.TransactionDate, 103) 'TransactionDate',

单独添加 pt.TransactionDate 作为额外的列，如下所示：

  ...     
  SELECT DISTINCT
    CONVERT(VARCHAR(50), pt.TransactionDate, 103) 'TransactionDate',
    pt.TransactionDate, -- <-- here
    m.MerchantName1 MerchantName,
    m.MerchantAddress Location,
    m.MerchantID,
    pt.TerminalID,
  ....

Answer 2

尝试：

ORDER BY 'TransactionDate'

Answer 3

这个错误没有多大帮助，但是 ughai 的评论是正确的。引擎对SELECT语句中列的修改方式有讲究，"ORDER BY."

中必须包含准确的形式

出于输出原因连接列时，我已经运行加入了这个，但它很快就变得丑陋了。

你必须

ORDER BY Convert(varchar(50),pt.TransactionDate,103)

Answer 4

如果您使用 GROUP BY 而不是 DISTINCT 来消除重复项，那么您可以包括分组字段，无论它们是否在 select 列表中。缺点是您必须列出所有使用的列，但这样做就可以了。

GROUP BY 
pt.TransactionDate,
m.MerchantName1,
m.MerchantAddress ,
m.MerchantID,
pt.TerminalID,
pt.batchnumber,
pt.SequenceNumber,
pt.PAN ,
c.EmbossName,
pt.TransactionTypeID,
pt.TotalAmount,
cc.usdconversionrate
ORDER BY pt.TransactionDate

将 DISTINCT 与 ORDER BY 子句一起使用

Use DISTINCT with ORDER BY clause

sql-server

select

distinct

sql-order-by