是否可以在IN子句中包含多個欄位？類似於以下內容：

select * from user
where code,userType in ( select code,userType from userType )

我正在使用mssqlserver 2008

我知道這可以通過連線和存在來實現,我只是想知道它是否可以用IN子句完成.

解決方法

來自MSDN(IN)：

test_expression [ NOT ] IN 
    ( subquery | expression [,...n ]
    ) 
 
subquery -
 
 Is a subquery that has a result set of one column. 
           This column must have the same data type as test_expression.
 
expression[,... n ] - Is a list of expressions to test for a match. 
                       All expressions must be of the same type as 
                       test_expression.
 

您可以使用以下兩個欄位來使用JOIN而不是IN：

SELECT U.* 
FROM user U
  INNER JOIN userType UT
    ON U.code = UT.code
    AND U.userType = UT.userType