Introduction to PostgreSQL for MySQL Users: Difference between revisions

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After selecting a DB you can go ahead and execute SQL commands.
After selecting a DB you can go ahead and execute SQL commands.
== listing all tables ==
You can list tables in a DB.
MySQL:
<syntaxhighlight lang="mysql">
mysql> show tables;
</syntaxhighlight>
PostgreSQL:
<syntaxhighlight lang="psql">
postgres=# \dt
</syntaxhighlight>


== Exiting from DB ==
== Exiting from DB ==


Ctrl-D should exit from both.
Ctrl-D should exit from both.

Revision as of 12:55, 29 August 2016

Last tested on Ubuntu 16.04.01 LTS (xenial)

Getting into DB console.

MySQL:

$ mysql -uroot -p

PostgreSQL:

$ sudo su postgres
postgres@hydrogen:~$ psql

Creating DB

Creating a database and granting a user complete access.

MySQL:

mysql> create database mydb;
mysql> grant all on mydb.* to dbuser@localhost identified by 'mypass';

PostgreSQL:

postgres=# create user dbuser with password 'mypass';
postgres=# create database mydb;
postgres=# grant all privileges on database mydb to dbuser;

Listing DBs

You can list the DBs.

MySQL:

mysql> show databases;

PostgreSQL:

postgres=# \l

selecting a DB

You can select a DB.

MySQL:

mysql> use mydb;

PostgreSQL:

postgres=# \connect mydb;

After selecting a DB you can go ahead and execute SQL commands.

listing all tables

You can list tables in a DB.

MySQL:

mysql> show tables;

PostgreSQL:

postgres=# \dt

Exiting from DB

Ctrl-D should exit from both.