@@identity的使用

-- =============================================
-- Author:        Qiuhua,Huang
-- Create date: 08/09/2012
-- Description:    insert into tabel of "call" 
-- =============================================
 --pro_insertCall 1958,'20',0,0,'22333',2,'2012-05-03','2012-02-03',0
ALTER PROCEDURE [dbo].[pro_insertCall]
    @shopId int,
    @callerID varchar(200),--callerName
    @callstatus int=0,
    @callcategory int,
    @callcontent varchar(1000),
    @adduser int,
    @calldatetime varchar(50),
    @addtime varchar(50),
    @toptradeID int
AS
BEGIN

    declare @insertSQL VARCHAR(4000)
    
    set @insertSQL='
                insert into [call](
                                    shopID,
                                    callerID,
                                    callstatus,
                                    calldatetime,
                                    callcategory,
                                    callContent,
                                    adduser,
                                    addtime,
                                    IPTime,
                                    completeTime,
                                    etatime,
                                    toptradeID,
                                    DateRev)
                values('
                        +Convert(varchar,@shopId)+','
                        +''''+@callerID+''','
                        +Convert(varchar,@callstatus )+','''
                        +@calldatetime+''','
                        +Convert(varchar,@callcategory )+','
                        +''''+@callcontent +''''+','
                        +Convert(varchar,@adduser)+','''
                        +@addtime+''','+
                        +'null'+','
                        +'null'+','
                        +'null'+','
                        +Convert(varchar,@toptradeID)+','
                        +'null'+')'                
                        
                        
        print @insertSQL            
        exec(@insertSQL)
        
        declare @callrequestnum varchar(20)
        declare @id int
        --查询刚插入记录的id
        set @id = (select top 1 @@identity from dbo.call)
        set @callrequestnum = convert(varchar,@id+1000)
        update dbo.call set callrequestnum=@callrequestnum where id=@id
        
                            
END