Tsql 不正确的语法输入到IF。。。ELSE条款

我有一个非常简单的查询，如：

BEGIN TRY
BEGIN TRAN;
    DECLARE @CurrentPassword VARCHAR(255) = (SELECT TOP 1 [Password] 
                                             FROM Employee 
                                             WHERE @EmpGuid = EmpGuid)
    IF (@Password = @CurrentPassword)
        UPDATE [Employee] 
        SET [Password] = @NewPassword 
        WHERE @EmpGuid = EmpGuid

    SELECT 1;
    ELSE
        SELECT 2;

    COMMIT TRAN
END TRY
BEGIN CATCH
    ROLLBACK TRAN
END CATCH

但是我真的不知道为什么在我的

else

子句中我得到了

“ELSE”附近的语法不正确

我做错了什么？关于如果您想在

后面有多个语句，如果
，则必须使用一个
开始。。。。结束
块-如下所示：

BEGIN TRY
BEGIN TRAN;
    DECLARE @CurrentPassword VARCHAR(255) = (SELECT TOP 1 [Password] 
                                             FROM Employee 
                                             WHERE @EmpGuid = EmpGuid)
    IF (@Password = @CurrentPassword)
    BEGIN     --- you need a *BEGIN* here!!!
        UPDATE [Employee] 
        SET [Password] = @NewPassword 
        WHERE @EmpGuid = EmpGuid

        SELECT 1;
    END        --- and the *END* for your new *BEGIN*
    ELSE
        SELECT 2;

    COMMIT TRAN
END TRY
BEGIN CATCH
    ROLLBACK TRAN
END CATCH

明确使用
begin。结束

BEGIN TRY
BEGIN TRAN
    DECLARE @CurrentPassword VARCHAR(255) = (SELECT TOP 1 [Password] 
                                             FROM Employee 
                                             WHERE @EmpGuid = EmpGuid)
    IF (@Password = @CurrentPassword)
    BEGIN

        UPDATE [Employee] 
        SET [Password] = @NewPassword 
        WHERE @EmpGuid = EmpGuid

    SELECT 1
    END

    ELSE

    BEGIN
        SELECT 2
    END

    COMMIT TRAN
END TRY
BEGIN CATCH
    ROLLBACK TRAN
END CATCH

也许你应该多读一点。要定义语句块，请使用流关键字BEGIN和END的控件