sql 多 case 语句

Question

嗨，我正在尝试编写多个 case 语句来预设作业的优先级。这涉及到一些表和 ID，但基本上我想检查工作是否存在，如果与它相关的问题 ID 是 80，然后有多个案例陈述，那么如果工作次要类别是 1，那么答案将是 High 的 id。到目前为止我所做的代码可能解释得更好......

 ALTER Procedure [dbo].[usp_CreatePresetPriority]
   @HelpdeskID int,
   @MinorCategoryID int
 As
 BEGIN

IF EXISTS(SELECT * FROM TicketInformation WHERE TicketID = @HelpdeskID AND QuestionID = 80)
    BEGIN
        UPDATE TicketInformation
        SET AnswerInput = Null, 
            AnswerID = CASE @MinorCategoryID WHEN 87 THEN 129 END
        WHERE TicketID = @HelpdeskID And QuestionID = 80

    END

ELSE
    BEGIN
        INSERT INTO TicketInformation (TicketID, QuestionID, AnswerID, AnswerInput)
        VALUES (@HelpdeskID, 80, CASE @MinorCategoryID WHEN 87 THEN 129 END, Null)
    END

所以这有效，但仅适用于一个选项 - 其中 @MinorCategoryID = 87 我想要有超过 1 个语句设置 @MinorCategoryID WHEN 91THEN 130 等...

我试过了...

    IF EXISTS(SELECT * FROM TicketInformation WHERE TicketID = @HelpdeskID AND QuestionID = 80)
 UPDATE TicketInformation SET AnswerInput = Null, AnswerID = CASE @MinorCategoryID WHEN 87 THEN 129 WHERE TicketID = @HelpdeskID And QuestionID = 80
ELSE INSERT INTO TicketInformation (TicketID, QuestionID, AnswerID, AnswerInput) VALUES (@HelpdeskID, 80, CASE @MinorCategoryID WHEN 87 THEN 129 END, Null)



     IF EXISTS(SELECT * FROM TicketInformation WHERE TicketID = @HelpdeskID AND QuestionID = 80)
 UPDATE TicketInformation SET AnswerInput = Null, AnswerID = CASE @MinorCategoryID WHEN 91 THEN 130 WHERE TicketID = @HelpdeskID And QuestionID = 80
ELSE INSERT INTO TicketInformation (TicketID, QuestionID, AnswerID, AnswerInput) VALUES (@HelpdeskID, 80, CASE @MinorCategoryID WHEN 91 THEN 130 END, Null)

任何帮助表示赞赏 - 对不起，如果不清楚我有一个星期五模糊的头!

Answer 1

您可以将它分配给一个变量，然后只需插入该变量。

ELSE
    BEGIN

        SELECT @MinorCategoryID = CASE
               WHEN @MinorCategoryID = 87 THEN 129
               WHEN @MinorCategoryID = 91 THEN 130
            -- more cases here
            ELSE NULL 
        END
        INSERT INTO TicketInformation (TicketID, QuestionID, AnswerID, AnswerInput)
        VALUES (@HelpdeskID, 80, @MinorCategoryID, Null)
    END

或通过选择更改 values()

ELSE
    BEGIN                
        INSERT TicketInformation (TicketID, QuestionID, AnswerID, AnswerInput)
        SELECT @HelpdeskID, 
               80, 
               CASE 
                   WHEN @MinorCategoryID = 87 THEN 129
                   WHEN @MinorCategoryID = 91 THEN 130
                   -- more cases here
                   ELSE NULL 
                END, 
                Null
    END