I have two tables with an identical layout. The difference is that one
has data from this year and one has data from last year. For a
simplified example let's call them "table05" and "table06", and say that
each has a single column called "name". So we have
table05:
David
Bob
table06:
David
John
Paul
I want to select all rows from both tables, so the result (order not
important) is
David
Bob
David
John
Paul
This is surely trivial, but I read the section about joined tables and
it shows only how to give a result that has 2 columns, like
test=# select * from table05,table06;
name | name
-------+-------
David | David
David | John
David | Paul
Bob | David
Bob | John
Bob | Paul
One solution would to to create a third table and copy the first two
into it, but since the two tables change frequently this is
undesirable. How can I do it by querying the existing tables?
Note: This example is oversimplified. The real query will also test
other columns, like for example
select * from ( however I do the above) where age > 25
so the number of rows in the result will not be the sum of the number of
rows in each table.
David
