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.

Solution 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';

Solution 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 ;

Solution 3

If you want to get just the number of tables (without views) then:

select count(*) from information_schema.tables where table_type = 'BASE TABLE';

Or you can also filter by schema name by adding the where condition like:

table_schema = 'public'

Comments

[omar]

To explore what's going on in only one database I usually use \d. With this you can list the total number of tables, views and the sequences also.

[xnakos]

This should work for SQL Server, right? Not PostgreSQL.

[Capan]

What if we want to count the number of the tables ? I know we can see the number but i want to use this number in a sql statement ?