if not exists (select * from dbo.sysobjects where id = object_id(N'[IndexTable]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
create table IndexTable(Ex char(20), num integer)
go
create procedure SetIndex @Ex char(20),@result char(30) output,@Fmt integer
as
declare @num char(10)
SET NOCOUNT on
if not exists(select num from indextable where Ex=@ex )
insert into indextable values(@ex,1)
else
update indextable set num=num+1
select @num=cast(num as char(10)) from indextable where ex=@ex
select @num=space(@fmt-len(@num))+@num
select @num=replace(@num,' ','0')
select @result=rtrim(@ex)+rtrim(@num)
SET NOCOUNT off
go
--------
在delphi中调用
procedure TForm1.Button1Click(Sender: TObject);
begin
StoredProc1.ParamByName( '@Ex').AsString:='User' ;
StoredProc1.ParamByName( '@fmt').AsInteger:=3 ;
StoredProc1.ExecProc;
showmessage(StoredProc1.ParamByName( '@result').value )
end;
-----------
参数@ex表示前缀，@fmt表示数字长度，@result表示返回数据
返回User001