Question

Ok I have a question and it is probably very easy but I can not find the solution.

I have 3 tables plus one main tbl.

tbl_1 - tbl_1Name_id 
tbl_2- tbl_2Name_id 
tbl_3 - tbl_3Name_id

I want to connect the Name_id fields to the main tbl fields below.

main_tbl 
___________ 
tbl_1Name_id 
tbl_2Name_id 
tbl_3Name_id

Main tbl has a Unique Key for these fields and in the other table, fields they are normal fields NOT NULL.

What I would like to do is that any time when the record is entered in tbl_1, tbl_2 or tbl_3, the value from the main table shows in that field, or other way.
Also I have the relationship Many to one, one being the main tbl of course.

I have a feeling this should be very simple but can not get it to work.

Answer 1

Here is a sample trigger that may show you waht you need to have:

Create trigger mytabletrigger ON mytable
For INSERT 
AS

INSERT MYOTHERTABLE (MytableId, insertdate)
select mytableid, getdate() from inserted

In a trigger you have two psuedotables available, inserted and deleted. The inserted table constains the data that is being inserted into the table you have the trigger on including any autogenerated id. That is how you get the data to the other table assuming you don’t need other data at the same time. YOu can get other data from system stored procuders or joins to other tables but not from a form in the application.

If you do need other data that isn’t available in a trigger (such as other values from a form, then you need to write a sttored procedure to insert to one table and return the id value through an output clause or using scope_identity() and then use that data to build the insert for the next table.