How to get the total number of tables in postgresql?

Question

Is there any way by which I can get the total number of tables in a Postgresql database? The postgresql version I'm using is PostgreSQL 8.4.14.

Answer 1

select count(*)
from information_schema.tables;

Or if you want to find the number of tables only for a specific schema:

select count(*)
from information_schema.tables
where table_schema = 'public';

Answer 2

Just try to search in pg_stat... tables or information_schema you can find there very useful informations about your database.
Example:

select * from  pg_stat_user_tables ;
select count(*) from  pg_stat_user_tables ; 
select * from  pg_stat_all_tables ;

Answer 3

select Count(*) from sys.tables