strcomp不能使用ms sql

Question

用於登錄的代碼使用ms access，它工作正常。但是，我需要將數據庫更改爲ms sql 2008，並且sql strcomp不起作用。那麼，我需要strcomp替代sql或如何使下面的代碼與ms sql數據庫工作？

Set rs = con.Execute("SELECT * FROM Users where StrComp(UserName, '" & sfindtext & "', 0) = 0") 

If rs.EOF Then 
    recfound = False 
Else 
    With rs 
    recfound = True 
    UserID = !UserID 
    Username = !Username 
    Password = !UPassword 
    Privilege = !Privilege 
    End With 
End If 

Answer 1

您可以使用CASE語句來檢查sfindtext的價值：

Set rs = con.Execute(" 
SELECT * 
FROM Users 
where (case when UserName = '" & sfindtext & "' then 0 else 1 end) = 0") 

下面是查詢工作

的SQL Fiddle Demo或者你甚至不需要邏輯CASE件：

Set rs = con.Execute(" 
SELECT * 
FROM Users 
where UserName = '" & sfindtext & "'"