当写一个insert语句时，某一字段需要从需要插入的数据库中获取其最大值并且加1


ALTER  PROCEDURE [dbo].[T_InsertMX]

 -- Add the parameters for the stored procedure here

 (

        @sReport nvarchar(50),

        @fName nvarchar(50),

        @fModel nvarchar(50),

        @fNumber nvarchar(50),

        @fManufacturer nvarchar(50),

        @fValidity nvarchar(50),

        @result nvarchar(50) output

    )

AS

BEGIN

 -- SET NOCOUNT ON added to prevent extra result sets from

 -- interfering with SELECT statements.

 SET NOCOUNT ON;

 set @result='失败'

  declare @fOrder nvarchar(50)

  set @fOrder=0

    if  exists(select sReport from Tmp_TestReportMX where sReport=@sReport)

        select @fOrder=max(forder) from Tmp_TestReportMX where sReport=@sReport

    -- Insert statements for procedure here

 Insert Into Tmp_TestReportMX(sReport,fOrder,fName,fModel,fNumber,fManufacturer,fValidity)

 values(@sReport,@fOrder+1,@fName,@fModel,@fNumber,@fManufacturer,@fValidity)

 

 set @result='成功'

END