检查记录是否存在,如果是,则"更新",如果不是"插入"

Question

如果没有用于插入表的记录,我想检查表PREMIUM_SERVICE_USER是否存在 strClientID更新timeValid+30的记录.strClientIDpremium_service_user

我究竟做错了什么？

它增加timeValid了+30天,但也插入了另一行.

SELECT @pre_var = count(*) 
FROM PREMIUM_SERVICE_USER 
WHERE strClientID = @strClientID

/* bronze premium - 200 cash */
IF @Premium = 1
BEGIN
    INSERT INTO PREMIUM_SERVICE_USER 
        (strClientID, timeReg, timeValid, bCurrent, durum) 
    VALUES 
        (@strClientID,getdate(),getdate() + 30,'1','1')

    UPDATE TB_USER 
    SET cash = cash+200 
    WHERE strAccountID = @strClientID
END

IF @Premium = 1 AND @pre_var = 1
BEGIN
    UPDATE PREMIUM_SERVICE_USER 
        SET timevalid = timevalid+30 where strClientID = @strClientID
    UPDATE PREMIUM_SERVICE_USER 
        SET bCurrent = 1 where strClientID = @strClientID
    UPDATE TB_USER 
        SET cash = cash+200 WHERE strAccountID = @strClientID
END

Answer 1

你的问题是第一次运行if而不考虑值@pre_var.

这是一种略微不同的做法,如果PREMIUM_SERVICE_USER很大,效率会略高一些.

if @Premium = 1
  begin
    if exists(Select 1 From PREMIUM_SERVICE_USER Where strClientID = @strClientID)
      BEGIN
        update PREMIUM_SERVICE_USER set timevalid = timevalid+30 where strClientID = @strClientID
        update PREMIUM_SERVICE_USER set bCurrent = 1 where strClientID = @strClientID
        UPDATE TB_USER SET cash = cash+200 WHERE strAccountID = @strClientID
       END
    ELSE
      BEGIN
        INSERT INTO PREMIUM_SERVICE_USER (strClientID, timeReg, timeValid, bCurrent, durum) VALUES (@strClientID,getdate(),getdate() + 30,'1','1')
        UPDATE TB_USER SET cash = cash+200 WHERE strAccountID = @strClientID
       END
  end

Answer 2

CREATE PROCEDURE sp_UpdateProcessed
AS
BEGIN
    DECLARE @Processed_Status NVARCHAR(256)
    SET @Processed_Status = 'ACTIVE'
    IF(@Processed_Status <> 'Processed')
    BEGIN
       SET @Processed_Status = 'Active'
       UPDATE ST_JnlMediumMoveNew
       SET ST_JnlMediumMoveNew.Process_Status = @Processed_Status 
    END
END