Обсуждение: How to list and describe tables in psql???
Hi All,
Below are the details:
Connect to default database:
=====================
bash-4.1$ ./psql -p 5432 postgres
Password:
psql.bin (9.1.7)
Type "help" for help.
postgres=#
To list all available database:
=====================
postgres=# \l+
List of databases
Name | Owner | Encoding | Collate | Ctype | Access privileges | Size | Tablespace | Description
-----------+----------+----------+-------------+-------------+-----------------------+---------+------------+--------------------------------------------
pem | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | postgres=CTc/postgres+| 29 MB | pg_default |
| | | | | pem_user=Tc/postgres +| | |
| | | | | pem_agent=Tc/postgres | | |
postgres | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | | 6570 kB | pg_default | default administrative connection database
template0 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +| 6457 kB | pg_default | unmodifiable empty database
| | | | | postgres=CTc/postgres | | |
template1 | postgres | UTF8 | en_US.UTF-8 | en_US.UTF-8 | =c/postgres +| 6457 kB | pg_default | default template for new databases
| | | | | postgres=CTc/postgres | | |
(4 rows)
To change Database:
===============
postgres=# \c edb
You are now connected to database "edb" as user "postgres".
edb=#
To check list of schemas:
===================
postgres=# \dn
List of schemas
Name | Owner
--------+----------
abdul | postgres
public | postgres
(2 rows)
To set a Schema for a session:
=======================
postgres=# set search_path to abdul;
SET
postgres=# show search_path ;
search_path
-------------
abdul
(1 row)
postgres=# create table test (n numeric, Name varchar(10));
CREATE TABLE
postgres=# insert into test values (generate_series(1,10),'TEST');
INSERT 0 10
postgres=# select * from test;
n | name
----+------
1 | TEST
2 | TEST
3 | TEST
4 | TEST
5 | TEST
6 | TEST
7 | TEST
8 | TEST
9 | TEST
10 | TEST
(10 rows)
To list all tables of a current schema:
===========================
postgres=# \dt+
List of relations
Schema | Name | Type | Owner | Size | Description
--------+------+-------+----------+-------+-------------
abdul | test | table | postgres | 16 kB |
(1 row)
Hope this helps.
Thanks & Regards,
Abdul Sayeed
System Engineer
The Postgres Database Company
Are you updated: Latest version of Postgres Plus Advanced Server are 8.4.19.42, 9.0.15.33, 9.1.11.19, 9.2.6.16, 9.3.2.5.
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On Thu, Jan 2, 2014 at 4:34 PM, Raymond O'Donnell <rod@iol.ie> wrote:
On 02/01/2014 01:53, peterlen wrote:Possibly a silly question, but are you connected to the correct
> I am using PostgreSQL 9.1 and have boon looking for psql commands to list all
> tables in the current database as well as how to "describe" a given table.
> I have come across some info on the web (older mostly) that lists commands
> like \d, \dt, or \d+ <tablename> but I get results like "no relations found"
> or "column reltriggers does not exist". Not sure what is going on.
>
> Can someone enlighten me on the right commands to use?
database? If you don't specify a database on the psql command line, then
psql connects to a database with the same name as the username you use
to connect, if such a database exists.
Ray.
--
Raymond O'Donnell :: Galway :: Ireland
rod@iol.ie
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