Querying tables from multiple databases

Question

I have a table1 in database A and a table2 in database B. Are there any tools available which can allow me to query like

select 
    table1.column1, table1.column2, table2.column1, table2.column2    
where 
    table1.column1 = table2.column3.

Would like to do this in POSTGRES if possible.