SQL--Pairwise condition

Question

Does SQL have any pairwise conditions in the WHERE clause that aren't using IN? My use case is I have two tables: (Date, ID) from table ABC and (LaunchDate, ID) from table XYZ. My condition is that ABC.ID is in XYZ.ID and ABC.Date>=XYZ.LaunchDate (for that corresponding ID). However, if I have (3/5, 1) in ABC and (3/4, 1) in XYZ, a pairwise IN won't work because (3/5, 1) isn't in XYZ?

What I have right now:

select date,ID 
from ABC where (date,ID) in (select LaunchDate, ID 
                             from XYZ 
                             where date>=LaunchDate)

Answer 1

You seem to want exists :

where exists (select 1
              from xyz
              where xyz.id = abc.id and abc.date >= xyz.lunchdate
             )

In general, I recommend exists over in anyways with subqueries, because exists is usually simpler to optimize (although some databases do quite well optimizing in ).