On Tue, Nov 29, 2005 at 03:44:10PM -0800, Srinivas Iyyer wrote: > Now my question is how can I ask SQL the question: > > For T3 what are the Drugs ? > For T4 what are the drugs? > > For a group of drugs m1,m3,m5 what are the targets? I think you're looking for a join. These parts of the PostgreSQL documentation should help: http://www.postgresql.org/docs/8.1/interactive/tutorial-join.html http://www.postgresql.org/docs/8.1/interactive/queries-table-expressions.html You could also google for words like "sql tutorial join". -- Michael Fuhr
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