Question

我有一个包含帐号和标签（关键字）的表格。我的查询会检查该帐户是否存在，如果存在，则需要将新关键字附加到已退出的帐户。

如果帐户没有退出，则只需进行简单插入。

我的目标是获取IF Exists子句中的当前标记，并在update语句中将新数据附加到其中。有什么想法吗？

BEGIN
SET NOCOUNT ON;

IF EXISTS (SELECT id, tags FROM AccountLogAccounts WHERE account = @account)
BEGIN
    UPDATE AccountLogAccounts 
    SET tags = (
        SELECT tags 
        FROM AccountLogAccounts
        WHERE account = @account
    ) + ',' @tags --This doesn't work :)
    WHERE account = @account
END
ELSE
    BEGIN
         INSERT INTO AccountLogAccounts (
            account,
            location,
            tags,
            whoAdded,
            whenAdded
        ) VALUES (
            @account,
            @location,
            @tags,
            @ntid,
            GETDATE()
        )
            END
END

Answer 1

而不是......

UPDATE AccountLogAccounts 
    SET tags = (
        SELECT tags 
        FROM AccountLogAccounts
        WHERE account = @account
    ) + ',' @tags --This doesn't work :)
    WHERE account = @account

...尝试...

UPDATE AccountLogAccounts 
    SET tags = tags + ',' + @tags
    WHERE account = @account

修改

这是一个小小的演示（未经测试，但应该有效）：

CREATE PROCEDURE UpdateMyText @account int, @tags nvarchar(max) AS UPDATE AccountLogAccounts SET tags = CAST(tags as nvarchar(max)) + ',' + @tags WHERE account = @account GO EXEC UpdateMyText 12345, 'abc' GO

TSQL追加到行

1 个答案: