How to delete duplicates in SQL table based on multiple fields

Question

I have a table of games, which is described as follows:

+---------------+-------------+------+-----+---------+----------------+
| Field         | Type                


        

Answer 1

select orig.id,
       dupl.id
from   games   orig, 
       games   dupl
where  orig.date   =    dupl.date
and    orig.time   =    dupl.time
and    orig.hometeam_id = dupl.hometeam_id
and    orig. awayteam_id = dupl.awayeam_id
and    orig.locationcity = dupl.locationcity
and    orig.locationstate = dupl.locationstate
and    orig.id     <    dupl.id

this should give you the duplicates; you can use it as a subquery to specify IDs to delete.