SQL Server（如果存在）更新，否则插入

Question

以下查询未检查更新语句始终仅插入，其中我在以下代码中做错了。

ALTER Procedure [dbo].[UpdateData]
  @JobOrder varchar(50)
AS
BEGIN
      --DECLARE @UPDATING INT
      IF EXISTS(SELECT  1  FROM [ADDLINKSERVER].[DATABASE].[dbo].[TABLE] WHERE JobOrder=@JobOrder ORDER BY JobStatus DESC) 

      BEGIN
          UPDATE [ADDLINKSERVER].[DATABASE].[dbo].[TABLE] 
          SET 
          RepairComment = (SELECT Top 1 Status_Comment FROM LOCALDB.dbo.LOCALTABLE Where REPAIRNO=@JobOrder Order By TRACKINGID desc),
          Amount = (SELECT Top 1 LABOR_AMT+PARTS_AMT As Amount FROM LOCALDB.dbo.LOCALTABLE Where REPAIRNO=@JobOrder Order By TRACKINGID desc),
          JobStatus = (SELECT Top 1 Job_Status FROM LOCALDB.dbo.LOCALTABLE Where REPAIRNO=@JobOrder Order By TRACKINGID desc)
          WHERE JobOrder=@JobOrder
      END
         ELSE BEGIN

               INSERT INTO [ADDLINKSERVER].[DATABASE].[dbo].[TABLE](JobOrder,RepairComment,JobStatus,Branch,Customer,
               Contact,Technician,ReceiptDate,Complaint,Amount,Warranty,ServiceType)
               (
                Select Top 1
                JT.REPAIRNO,JT.StatusComment,JT.JobStatus,
                SJ.MAINSC,SJ.CUSTOMER + ' ' + SJ.CUSTOMERLAST AS FullName,SJ.Tel,SJ.ENGINEER,SJ.RECEIPTDATE,
                SJ.DEFECTDESC,SJ.LABOR_AMT+PARTS_AMT As Amount,SJ.WARRANTY,SJ.SERVICETYPE
                FROM
                LOCALDB1 SJ
                INNER JOIN LOCALDB2 JT ON
                JT.REPAIRNO=SJ.REPAIRNO
                WHERE JT.REPAIRNO=SJ.REPAIRNO)
          END
END

尝试将数据从localdb更新到remoteserver。

Answer 1

您的过程的最后一行

WHERE JT.REPAIRNO=SJ.REPAIRNO

不选择任何特定的工作编号。 它只是从源中选择一个随机记录并将其插入。

更改为此：

WHERE JT.REPAIRNO=@JobOrder

Answer 2

要调试它，只需输入一个有效的@JobOrder值并在第二个破折号后的注释行中执行代码“ SELECT *”的突出显示……执行sql并确保结果正确

     BEGIN
         UPDATE [ADDLINKSERVER].[DATABASE].[dbo].[TABLE] 
         SET
             RepairComment = lc.Status_Comment,
             Amount = lc.Amount,
             JobStatus = lc.Job_Status
        --SELECT *
           FROM [ADDLINKSERVER].[DATABASE].[dbo].[TABLE] as t1
         INNER JOIN (SELECT top 1 Status_Comment
                                 ,LABOR_AMT+PARTS_AMT As Amount
                                 ,Job_Status
                            FROM LOCALDB.dbo.LOCALTABLE 
                         Where REPAIRNO=@JobOrder 
                            Order By TRACKINGID desc) as lc
            ON t1.JobOrder=lc.REPAIRNO
        WHERE t1.JobOrder=@JobOrder

Answer 3

与其这样做，不如计算结果并检查count> 0是否大于更新，否则可以插入

SELECT COUNT(*)
  INTO l_cnt
  FROM table

IF( l_cnt > 0 )
THEN
  Update
END IF;