How do you avoid column name conflicts?

Question

I was recently assigned a task of creating an auction system. During my work, I met numerous occasions where my SQL queries that contained joins failed to execute due to amb

Answer 1

Change your naming convention so that each data element has a unique name in the schema e.g. auction_id, bid_id, user_id, etc. Ideally the name of the data element will not change between tables but sometimes you will need to add a qualifier to create a synonym e.g. adding_user_id and bidding_user_id if user_id appeared twice in the same table. You should document data element names and their synonyms in a data dictionary.