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嗨,大家好我寫了這個存儲過程,但有它的錯誤,即我得到錯誤「無法在nvarchar上調用方法」爲什麼?
不能調用nvarchar的方法
T-SQL代碼:
ALTER PROCEDURE dbo.User_Announcement_Create
@Announcement nvarchar(250),
@UserName nvarchar(256)
AS
BEGIN
DECLARE @NewAnnouncement nvarchar(250)
SELECT @NewAnnouncement = NULL
IF(@UserName.dbo.Announcements IS NULL)
(SELECT UserName FROM dbo.aspnet_Users
WHERE @UserName = UserName)
RETURN -1
END
DECLARE @CreateAnnouncement bit
DECLARE @ReturnValue int
SET @ReturnValue = 0
SELECT @NewAnnouncement = Announcement FROM Announcements
SET @CreateAnnouncement = 1
INSERT INTO Announcements (Announcement, UserName)
VALUES (@Announcement, @UserName)
任何人都可以請幫我解決這個問題?
這是什麼'IF(@ UserName.dbo.Announcements IS NULL)'該怎麼辦? – 2012-08-13 14:26:05
@UserName不是您的數據庫服務器名稱,因爲您正在使用它之前的dbo.Announcements。您不能以這種方式放置nvarchar或任何變量。 – 2012-08-13 14:29:59