TSQL: Create a view that accesses multiple databases

Question

I have a special case,

for example in table ta in database A, it stores all the products I buy

table ta(
id,
name,
price
)
         


        

Answer 1

Yes, views can reference three part named objects:

create view A.dbo.viewname as
select ... from A.dbo.ta as ta
join B.dbo.tb as tb on ta.id = tb.id
where ...

There will be problems down the road with cross db queries because of backup/restore consistency, referential integrity problems and possibly mirorring failover, but those problems are inherent in having the data split across dbs.