sql-server - 而不是插入子查询返回超过 1 个值

Question

下面的触发器有问题。我认为问题在于一次将多行添加到数据库中。

它需要适用于插入的 n* 行。

代码的意思是在插入时检查 ESHID 列与另一个表的 ID 在 4 个字符后开始

因此，如果有匹配项并且 isPersonalised 为 0，那么我需要将状态设置为 3，否则它应该保持与原始 FulfilmentStatus 相同。

ALTER TRIGGER [dbo].[setStatus] 
   ON  [dbo].[ESH_OrderLine]
   INSTEAD OF INSERT
AS 
BEGIN
    INSERT INTO ESH_OrderLine(

        OrderID,
        ESHID,
        ESHVersion,
        GBPPrice,
        Currency,
        FulfilmentStatus,
        FulfilmentDate
    )SELECT

        OrderID,
        ESHID,
        ESHVersion,
        GBPPrice,
        Currency,
        (
            SELECT "Status" =
            CASE
                WHEN isPersonalised = 1 THEN '0'    --PERSONALISED CD
                ELSE '3'                            -- NON PERSONALISED CD
            END
            FROM KSAT_CDs
            WHERE ID= SUBSTRING( (  
                                    SELECT ESHID FROM INSERTED
                                    WHERE ESHID like 'PHZB%' 
                                ),5,10)

            UNION
            SELECT "Status" =
                CASE
                WHEN ESHID = 'PNP' THEN '0'     --POSTAGE AND PACKING
            ELSE '4'                            --DOWNLOAD
            END
            FROM INSERTED
            WHERE ESHID NOT LIKE 'PHZB%'
        ) as FulfilmentStatus,
        FulfilmentDate
     FROM
    INSERTED

END

Answer 1

将您的第一部分更改union为此有帮助吗？

SELECT "Status" =
            CASE
                WHEN k.isPersonalised = 1 THEN '0'    --PERSONALISED CD
                ELSE '3'                            -- NON PERSONALISED CD
            END
            FROM KSAT_CDs k
            inner join inserted i on k.ID = substring(i.ESHID, 5, 10)
            where i.ESHID like 'PHZB%'