How to get the next number in a sequence

Question

I have a table like this:

+----+-----------+------+-------+--+
| id | Part      | Seq  | Model |  |
+----+-----------+------+-------+--+
| 1  | Head      | 0         


        

Answer 1

create function dbo.fncalnxt(@model int)
returns int 
begin
declare @seq int
select @seq= case when @model=3 then max(id) --else
end from tblBodyParts
return @seq+1
end
--query idea To insert values, ideal if using SP to insert
insert into tblBodyParts values('groin',dbo.fncalnxt(@model),@model)

You can try this i guess. A novice shot, correct me if im wrong. i'd suggest using function to get the value in seq column based on model; you'll have to check the else case though to return another value you want, when model!=3, it'll return null now.