SQL区分大小写

Question

简介

我有一个表格，其中包含一个列＆＃34; AccountCode＆＃34;和其他专栏。几个帐户代码相同但不同区分大小写。 例如：

AccountCode   OrderId
ABC           O001
ABC           O002
abc           O003
DEF           O004

目的

我希望查询在AccountCode列上有一个组，并获得相应的计数。预期输出应该像

ABC      2
abc      1
DEF      1

我尝试过使用COLLATE Latin1_General_CS_AS但无法获得所需的结果。

以下查询并未提供区分大小写的输出

select accountCode COLLATE Latin1_General_CS_AS, count(OrderId) 
from <<TableName>> 
group by accountCode

Answer 1

也在GROUP BY子句上分配COLLATE

select accountCode COLLATE Latin1_General_CS_AS, count(OrderId)  
from <<TableName>>  
group by accountCode COLLATE Latin1_General_CS_AS

Answer 2

create table #a
(
AccountCode varchar(10)  , OrderId varchar(10)
)
insert into #a values
('ABC','O001'),
('ABC','O002'),
('abc','O003'),
('DEF','O004')

select accountCode COLLATE Latin1_General_CS_AS, count(OrderId) from #a group by accountCode COLLATE Latin1_General_CS_AS

Answer 3

BEGIN TRAN CREATE TABLE #Temp（AccountCode VARCHAR（100），OrderId VARCHAR（100））

INSERT INTO #Temp（AccountCode，OrderId） 选择＆＃39; ABC＆＃39;，＆＃39; O001＆＃39; UNION ALL 选择＆＃39; ABC＆＃39;，＆＃39; O002＆＃39; UNION ALL SELECT＆＃39; abc＆＃39;，＆＃39; O003＆＃39; UNION ALL SELECT＆＃39; DEF＆＃39;，＆＃39; O004＆＃39;

SELECT AccountCode COLLATE Latin1_General_CS_AS，COUNT（OrderId）FROM #Temp GROUP BY accountCode COLLATE Latin1_General_CS_AS

ROLLBACK TRAN