How can a SQL query have two from clauses?

Question

This just looks so odd to me:

delete from GearsDev.dbo.Products 
from GearsDev.dbo.Products as C
inner join #Common as M
    on M.item = C.ItemNumber
         


        

Answer 1

You can constrain the set of records you want to delete by more than one table. The second from just generates the alias C for the table you delete from, joins it with the table #common and deletes only records which have a record in talbe #common.