关于SQL的拼接，单引号问题~~在线等~~着急~~

SQL code

declare @Sql varchar(1000)declare @ACCOUNT varchar(50)='-1'  --@ACCOUNT 为 testName 时也需要符合Set @Sql ='select * from T_ORDER where   ('+CASE @ACCOUNT WHEN '-1' THEN '1=1' ELSE 'ACCOUNT = '''+CAST(@ACCOUNT AS varchar(50)) END+''') 'select @Sql

希望高手能执行下以上这段SQL，当我传入-1时候，打印出来多一个单引号，求解阿。

如果把

SQL code

ACCOUNT = '''+CAST(@ACCOUNT AS varchar(50)) END+'''

变成

SQL code

ACCOUNT = '+CAST(@ACCOUNT AS varchar(50)) END+'

传入-1是对了，但是传入字符串用户名又缺少了单引号，在线求解~~

[解决办法]

SQL code

declare @Sql varchar(1000)declare @ACCOUNT varchar(50)='-1'  --@ACCOUNT 为 testName 时也需要符合Set @Sql ='select * from T_ORDER where   ('+CASE @ACCOUNT WHEN '-1' THEN '''' ELSE 'ACCOUNT = '''+CAST(@ACCOUNT AS varchar(50)) END+''') 'select @Sql
[解决办法]
SQL code
declare @Sql varchar(1000)declare @ACCOUNT varchar(50)  --@ACCOUNT 为 testName 时也需要符合set @ACCOUNT='-1'Set @Sql ='select * from T_ORDER where   ('+CASE @ACCOUNT WHEN '-1' THEN '1=1' ELSE 'ACCOUNT = '''                    +CAST(@ACCOUNT AS varchar(50)) END+') 'select @Sql
[解决办法]
declare @Sql varchar(1000)
declare @ACCOUNT varchar(50)='-1'  --@ACCOUNT 为 testName 时也需要符合
Set @Sql ='select * from T_ORDER where ('+CASE @ACCOUNT WHEN '-1' THEN ' 1=1 ' ELSE ' ACCOUNT = '''+CAST(@ACCOUNT AS varchar(50))+'''' END +')'  
select @Sql