Question

I have two database say A and B.

A have a1 table having column names userid,pin_no and B database have b1 table having column names id,badge_no.

I want to insert data from a1 to b1 and b1 should get updated as and when a1 updates

Answer 1

you can do the insert with a simple select:

insert into DatabaseB.dbo.tableB1 (id, badge_no)
select userid, pin_no from  DatabaseA.dbo.tableA1

or inside a trigger:

create trigger insertBfromA
on tableA1
after insert
as
begin
    insert into DatabaseB.dbo.tableB1 (id, badge_no)
    select userid, pin_no from  inserted
end

same logic you can use for an update