Help Im A Beginner... Insert

Hi guys,

I am new to database programming... i know the answer is somewhere in the past forums and i unfortunately i can't locate it... I have this problem i hope you can help me.

I am trying to insert values into table hosp_wareitem and one of it is the itemid where in i would like to get the item id of an existing medicine... (i hope you can understand me guys) here is my query.. right now im puzzled and i know the answer is already there.. i just cant see it...


set xact_abort on
declare @id as integer
begin transaction
select @id (select medicines_id from
hosp_medicines where medicines_id = medicines_id)
insert into Hosp_WareItem
(ItemID,
Department_ID,
SalesGL_Code,
COSGL_Code,
InventoryGL_Code,
ExpenseGL_Code,
ReadersFeeGL_Code,
CreateBy,
UpdateBy,
DeleteBy,
CreateDate,
UpdateDate,
DeleteDate)
values
(@ID,
'1',
'AAA-111',
'AAA-000',
'AAA-112',
'',
'',
'0',
'',
'',
'1/1/1900 12:00:00 AM',
'1/1/1900 12:00:00 AM',
'')
Update Hosp_Counter set Counter_ID = @ID
where Table_Description = 'wareitem'
commit transaction

it returns an error

(1 row(s) affected)


(24 row(s) affected)

Server: Msg 515, Level 16, State 2, Line 6
Cannot insert the value NULL into column 'ItemID', table 'Medix_Hospital.dbo.Hosp_wareitem'; column does not allow nulls. INSERT fails.

it tries to insert a null value in itemid because it cant get the value of the medicine_id.

any help is much appreciated!

puzzled
joel