[GENERAL] how pg_hba.conf

hai      have to solve one problem         i have two mechine in diffrent network range , one is main database server(n/w is 10.1.2.0) and other is back bone server(n/w 10.1.7.0)      i need to take pg_dump from back bone server .       what configuration needed in pg_hba.conf     thx

[GENERAL] query optimizer

  hai all     plz send gen info abt query optimizer technic in postgresql      with example

[GENERAL] incremental backup?

hai all   plz give the right answer       have to daily back up only the just update or inserted data only , how it possible In postgresql?    now am doing incremental backup of the  file system (/var/lib/pgsql/data)   regards SHYJU C.K

[GENERAL] HOW SELECT

hai all       i have table  ,as follows   -- |id_int  |vid_int |name_chv  |   address_txt  | --