Sql server MSSQL2016更新触发器，根据位列的总和在其他表中插入记录

我正在尝试自动化我们的订单状态更新系统。以下是我们现有的流程：

订单通过FTP文件作为一个订单进入我们的系统，并被拆分为2个或多个订单插入到SplitOrdersHeader_tb中 产生的多个订单从SplitOrders表标题和明细发送到ERP系统 ERP系统为插入到OrderConfirmationHeader_tb和detail表中的每个订单生成订单确认 收到所有拆分订单确认后，需要更新原始单订单状态 以下是相关表格：

CREATE TABLE SplitOrdersHeader_tb(
    OriginalCustomerPONumber varchar(20),
    NewCustomerPONumber varchar(20),
    Company varchar(2),
    CustomerNumber varchar(10),
    OrderProcessed bit DEFAULT 0,
    OrderMoved bit DEFAULT 0,
    OrderConfirmationReceived bit DEFAULT 0
)

CREATE TABLE OrderConfirmationHeader_tb(
    MasterOrderNumber varchar(20),
    CustomerPONumber varchar(20),
    Company varchar(2),
    CustomerNumber varchar(10)
)

CREATE TABLE UpdateOtherSystem_tb(
    OriginalCustomerPONumber varchar(20)
)

我在OrderConfirmationHeader_tb上有一个触发器，在加载订单确认后更新每个拆分订单的状态：

CREATE TRIGGER dbo.INSERT_Update_SplitOrderConfirmations_tg
    ON dbo.OrderConfirmationHeader_tb
    AFTER INSERT
    AS

    SET NOCOUNT ON

    BEGIN
        UPDATE SOH
        SET SOH.OrderConfirmationReceived = 1,
            SOH.MasterOrderNumber = LTRIM(RTRIM(I.MasterOrderNumber))
        FROM OrderSplitting.SplitOrdersHeader_tb SOH
            INNER JOIN inserted I ON SOH.CustomerNumber = I.Customer
                AND SOH.NewCustomerPONumber = I.Reference
                AND SOH.Company = I.Company 
                AND SOH.OrderProcessed = 1
                AND SOH.OrderMoved = 1
    END

我想做的是在SplitOrdersHeader_tb上创建一个更新触发器，它将： -从原始CustomerPONumber中计算拆分订单的数量 -OrderConfirmationReceived值的总数 -如果COUNT=SUM，则在UpdateOtherSystem_tb中插入一条新记录，前提是UpdateOtherSystem_tb中不存在MasterOrderNumber

我有这个，但感觉太笨重了：

CREATE TRIGGER OrderSplitting.UPDATE_Update_WCO_Status_tg
    ON OrderSplitting.SplitOrdersHeader_tb
    AFTER UPDATE AS

    SET NOCOUNT ON

    BEGIN
        DECLARE @NEW_CUSTOMER_PO_NUMBER varchar(255),
                @ORIGINAL_CUSTOMER_PO_NUMBER varchar(255),
                @COUNT_OF_ORDER_HEADERS int,
                @TOTAL_CONFIRMED_ORDERS int

        SELECT @NEW_CUSTOMER_PO_NUMBER = NewCustomerPONumber
        FROM inserted

        SELECT @ORIGINAL_CUSTOMER_PO_NUMBER = OriginalCustomerPONumber,
                @COUNT_OF_ORDER_HEADERS = COUNT(*),
                @TOTAL_CONFIRMED_ORDERS = SUM(CAST(OrderConfirmationReceived as int))
        FROM OrderSplitting.SplitOrdersHeader_tb
        WHERE OriginalCustomerPONumber IN (SELECT OriginalCustomerPONumber
                                            FROM OrderSplitting.SplitOrdersHeader_tb
                                            WHERE NewCustomerPONumber = @NEW_CUSTOMER_PO_NUMBER)
        GROUP BY OriginalCustomerPONumber

        IF @COUNT_OF_ORDER_HEADERS = @TOTAL_CONFIRMED_ORDERS
            BEGIN
                BEGIN TRY
                    INSERT INTO OrderSplitting.UpdateOtherSystem_tb(OriginalCustomerPONumber)
                    VALUES(@ORIGINAL_CUSTOMER_PO_NUMBER)
                END TRY

                BEGIN CATCH
                    DECLARE @ERROR_MESSAGE varchar(MAX)
                    SET @ERROR_MESSAGE = ERROR_MESSAGE()

                    EXEC msdb..sp_send_dbmail
                            @recipients = <app_support>,
                            @subject = 'Update Trigger Error',
                            @body = @ERROR_MESSAGE
                END CATCH
            END
    END

---

我想我有些东西，但想得到一些额外的反馈，请：

CREATE TRIGGER OrderSplitting.UPDATE_Update_WCO_Status_tg
    ON OrderSplitting.SplitOrdersHeader_tb
    AFTER UPDATE AS

    SET NOCOUNT ON

    BEGIN TRY
        INSERT INTO OrderSplitting.UpdateOtherSystem_tb(OriginalCustomerPONumber)
            SELECT SOH.OriginalCustomerPONumber
            FROM OrderSplitting.SplitOrdersHeader_tb SOH
                INNER JOIN inserted I ON SOH.OriginalCustomerPONumber = I.OriginalCustomerPONumber
                LEFT OUTER JOIN OrderSplitting.UpdateOtherSystem_tb UOS ON SOH.OriginalCustomerPONumber = UOS.OriginalCustomerPONumber
            WHERE UOS.OriginalCustomerPONumber IS NULL
            GROUP BY SOH.OriginalCustomerPONumber
            HAVING COUNT(SOH.OriginalCustomerPONumber) = SUM(CAST(SOH.OrderConfirmationReceived as int))
    END TRY

    BEGIN CATCH
        DECLARE @ERROR_MESSAGE varchar(MAX)
        SET @ERROR_MESSAGE = ERROR_MESSAGE()

        EXEC msdb..sp_send_dbmail
        @recipients = <app_support>,
        @subject = 'Update Trigger Error',
        @body = @ERROR_MESSAGE
    END CATCH

---

当前触发器将只处理单行更新，即：inserted可以包含多行，并且从inserted中选择@NEW\u CUSTOMER\u PO\u NUMBER=NewCustomerPONumber只处理其中一行。如果两行或更多行同时更新会发生什么？这是我之前遇到的另一个问题，但我认为我只是看到了一些东西。既然有人也指出了这一点，我真的不知道该如何进行。