当子查询跟随 =、!=、<、<=、>、>= 时，这是不允许的

Question

我已经构建了一个 sql 作业来更新表中关于 where 子句中的条件的一些值，如下所示：

 Update c set isLoaded = 0 , LoadingState = 'L', isSent = 0
    from Container c
    where c.isloaded = 1 and DATEDIFF(second,  dateadd(HOUR, c.LoadingInterval,c.entrydate),  getdate()) / 3600.0 between c.LoadingInterval and (c.LoadingInterval + 2)

但是当我尝试运行此脚本时出现以下错误：

消息 512，级别 16，状态 1，过程 UpdateContainersStatistcs，行 9 子查询返回超过 1 个值。这是不允许的，当 子查询遵循 =、!=、、>= 或当子查询用作 一种表达。声明已终止。

原因是因为在表上创建了触发器。 我禁用了这个触发器，一切正常 触发脚本如下：

    CREATE TRIGGER [dbo].[UpdateContainersStatistcs]
ON [dbo].[Container]
After Update
AS
BEGIN
declare  @DayDateNow as int 
set   @DayDateNow = (select count( DayDate) From ContainersStatstics AS ConStc where DayDate= (SELECT CONVERT(date, getdate())) and ConStc.ContractorId =(Select Con.ContractorId from inserted as Con ) )
if @DayDateNow>0 

  BEGIN 
  if UPDATE(LoadingState)
      BEGIN
          if( (select i.LoadingState from inserted as i) = 'E')
            begin 
                if ((select i.LoadingState from inserted as i)=(select LoadingState from Container as Cont where Cont.RFID = (select d.RFID from deleted as d)))
                    begin
                          update ContainersStatstics
                          set EmptyContainersCount= (select EmptyContainersCount From ContainersStatstics as ConStc where (DayDate= (SELECT CONVERT(date, getdate())) and ConStc.ContractorId =(Select Con.ContractorId from inserted as Con ))) + 1
                          , ContainersCount=(select Count(Id) from Container where ContractorId =(Select Con.ContractorId from inserted as Con ))
                          where  ContractorId =(Select Con.ContractorId from inserted as Con ) and DayDate= (SELECT CONVERT(date, getdate()))
                      end
            end
        else
            begin
                if (select Count(EmptyContainersCount) From ContainersStatstics) > 0
                        begin
                                if ((select i.LoadingState from inserted as i)=(select LoadingState from Container as Cont where Cont.RFID = (select d.RFID from deleted as d)))
                                    begin
                                            update ContainersStatstics
                                            set EmptyContainersCount= (select EmptyContainersCount From ContainersStatstics as ConStc where (DayDate= (SELECT CONVERT(date, getdate())) and ConStc.ContractorId =(Select Con.ContractorId from inserted as Con ))) - 1
                                            , ContainersCount=(select Count(Id) from Container where ContractorId =(Select Con.ContractorId from inserted as Con ))
                                            where  ContractorId =(Select Con.ContractorId from inserted as Con ) and  DayDate= (SELECT CONVERT(date, getdate()))
                                    end
                            end
             end
      end
      else if UPDATE(WashingStatus)
      BEGIN
      if( (select i.WashingStatus from inserted as i) = 'E')
                BEGIN
                        if ((select i.WashingStatus from inserted as i)=(select WashingStatus from Container as Cont where Cont.RFID = (select d.RFID from deleted as d)))
                                BEGIN
                                        update ContainersStatstics
                                              set WashedContainersCount= (select WashedContainersCount From ContainersStatstics as ConStc where ( DayDate= (SELECT CONVERT(date, getdate())) )and ConStc.ContractorId =(Select Con.ContractorId from inserted as Con )) + 1
                                              , ContainersCount=(select Count(Id) from Container where ContractorId =(Select Con.ContractorId from inserted as Con ))
                                               where ContractorId =(Select Con.ContractorId from inserted as Con ) and DayDate= (SELECT CONVERT(date, getdate()))
                                    end
                end
      else
                Begin
                            if (select Count(EmptyContainersCount) From ContainersStatstics) > 0
                                    begin
                                            if ((select i.WashingStatus from inserted as i)=(select WashingStatus from Container as Cont where Cont.RFID = (select d.RFID from deleted as d)))
                                                    begin
                                                              update ContainersStatstics
                                                              set WashedContainersCount= (select WashedContainersCount From ContainersStatstics as ConStc where ( DayDate= (SELECT CONVERT(date, getdate())) )and ConStc.ContractorId =(Select Con.ContractorId from inserted as Con )) - 1,
                                                              ContainersCount=(select Count(Id) from Container where ContractorId =(Select Con.ContractorId from inserted as Con ))
                                                               where ContractorId =(Select Con.ContractorId from inserted as Con ) and DayDate= (SELECT CONVERT(date, getdate()))
                                                       end
                                    end
                end
      end
  end
else
  BEGIN 
   if UPDATE(LoadingState)
   BEGIN
    if ((select i.LoadingState from inserted as i)= 'E')
            begin 
              insert into  ContainersStatstics
             (EmptyContainersCount ,ContractorId,DayDate,ContainersCount,WashedContainersCount)values   (1,(select x.ContractorId from inserted x),(SELECT CONVERT(date, getdate())),(select Count(Id) from Container where ContractorId =(Select Con.ContractorId from inserted as Con )),0) 
            end
   END

    else if UPDATE(WashingStatus)
    begin 
    if ((select i.WashingStatus from inserted as i)= 'E')
        BEGIN
         insert into  ContainersStatstics
             (EmptyContainersCount ,ContractorId,DayDate,ContainersCount,WashedContainersCount)values   (0,(select x.ContractorId from inserted x),(SELECT CONVERT(date, getdate())),(select Count(Id) from Container where ContractorId =(Select Con.ContractorId from inserted as Con )),1) 

        end
    end
  end
END

Answer 1

查询完全正确，但错误原因是在同一张表上创建了触发器。

我禁用了桌子上的触发器，现在一切正常