postgresql learning record 1

9.3.5 database, the system fedora20, different operating systems differ slightly.

Can be installed using the yum command:sudo yum install postgresql,postgresql-server

After installation, the system will create a user postgres, it switches to the user to initialize the database after:

1	initdb --encoding=UTF-8 --no-locale -D /var/lib/pgsql/data/

Or use postgresql-setup initdb command.

Then start the service:pg_ctl -D /var/lib/pgsql/data start

In order to facilitate the following actions, I reset a user's password postgres:

1 2	sudo passwd -d postgres sudo -u postgres passwd

Then postgres user permissions given to the implementation of sudo, set the boot from the start:

1 2	Start postgresql.service systemctl systemctl enable postgresql large column  postgresql learning record 1 .service

Then use the psql commands can be entered into the database of the terminal.

Before entering the terminal database we first create a database:createdb mytest

But every time you want to view the database will need to switch the user too much trouble, so then create a role account with the same name and usually use:

1	CREATE ROLE myuser WITH SUPERUSER LOGIN PASSWORD '123456';

I am here in order to save directly to the user as a superuser, other details see official documentation can be.

Then switch back to the normal use of the accounts linked to: psql -h localhost -U myuser mytest(note the big U)

If you create a character above is a superuser or have the appropriate permissions, can also be executed directly createdb command to create the database.

Two configuration files used Location:

1 2	_ / var / lib / pgsql / data / postgresql.conf_ port and IP configuration _ / var / lib / pgsql / data / pg_hba.conf_ permissions configuration

This initial preparation is done.