This week's giveaway is in the Android forum.
We're giving away four copies of Android Security Essentials Live Lessons and have Godfrey Nolan on-line!
See this thread for details.
The moose likes JDBC and the fly likes 1:n join Big Moose Saloon
  Search | Java FAQ | Recent Topics | Flagged Topics | Hot Topics | Zero Replies
Register / Login

Win a copy of Android Security Essentials Live Lessons this week in the Android forum!
JavaRanch » Java Forums » Databases » JDBC
Bookmark "1:n join" Watch "1:n join" New topic

1:n join

Steve Chernyak
Ranch Hand

Joined: Oct 19, 2000
Posts: 113
I have two tables (Application, Applicant). Every application can have 1 or 2 applicants. Primary key in Application (oid) is the foreign key in Applicant(app_oid). Applicants have different lastnames and SSNs. I would like to allow searching for applications based on lastname or ssn of either applicant. I would also like to do it in one sql statement. Note i need both applicants to comeback in the result set even if only one of theirs (ssn, lastname) matches the requested value.

Michael Zalewski
Ranch Hand

Joined: Apr 23, 2002
Posts: 168
Join to the Applicant table twice. Once to select both applicants, and again to filter the applications by applicant name.

If it is possible that both applicants could be the same, you might need
I agree. Here's the link:
subject: 1:n join
Similar Threads
Dynamic table generation
Doubt on table design and Hibernate mapping
Behaviour HashMap
Class conversion to string
Sample SQL question