using pg_tables and tablename in queries

I have a large number of tables with a common naming convention<br /><br />       mytable001, mytable002, mytable003
...mytable00n<br /><br /> I would like to do a query across all of the tables, however I do not know all of the tables
beforehand, and I do not want to ( cant ) manually generate a query like<br /><br />      select * from mytable001,
mytable002,mytable003<br /><br /><br /> I have a query that returns the names of the tables I want to query:<br /><br
/>   select tablename from pg_tables where tablename like 'mytable%'<br /><br /><br /> I have successfully done this
querybefore.  I remember it used a odd syntax; I it was something like <br /><br />     select * from ( select
tablenamefrom pg_tables where tablename like 'mytable%' )<br /><br /><br /> However the above query returns just a
listingof tables, I need to use its output in the FROM and treat the input as a table name.<br /><br /> ( I've tried
creatinga Table Function that returns the above set and tried to use that in a select clause, but I cant get it to
work.)<br /><br />