Hi all , I am using Linux6.1 , jdk1.3 , tomcat3.2.1 and jboss2.1. My question is very simple . I have two table in my database , usercompany and usercompanyinfo. in the usercompany , have the fields below : companyid(primary key); projectno(foreignkey); in the usercompanyinfo , have the fields below: projectid(primary key); projectno; projectname; client; One company can have many projectno in my database relationship. How to do a one to many relationship in jboss ?? Btw , if there any tutorial for one to one , many to many and one to many relationship in the net ? Thanks for info . wt _______________________________________________ JBoss-user mailing list [EMAIL PROTECTED] http://lists.sourceforge.net/lists/listinfo/jboss-user