sql - How to create a SELECT query FROM "TABLE1 AND TABLE2" -


i have postgresql database, select permissions. in db there 2 tables same structure (the same columns).

i need write several query in each table , join results.

there way writing query one?

select   field1,   field2,   field3   table1 ,   table2   condition;

select 2 tables. query = table1 or table1 + table2 have no answer , not question.

union all

select field1, field2, field3 table1 condition union select field1, field2, field3 table2 condition;

or simplify condition 

select * (   select field1, field2, field3     table1     union     select field1, field2, field3     table2 ) condition;

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