PostgreSQL

Interactively create a user

(Is a shell command)

$ createuser --interactive --pwprompt
Enter name of role to add: <USER>
Enter password for new role:
Enter it again:
Shall the new role be a superuser? (y/n) n
Shall the new role be allowed to create databases? (y/n) n
Shall the new role be allowed to create more new roles? (y/n) n

Create a database

(Is a shell command)

Also sets the owner

$ createdb -O <OWNER> <DBNAME>

Commands for the psql shell

\l          list databases
\c <DB>     connect to a database
\dt         list tables
\d <TABLE>  describe table
\df         list functions
\dy         list trigger

Find and kill query process

To get a list of all currently running query process (like SHOW FULL PROCESSLIST from MySQL) enter:

SELECT * FROM pg_stat_activity;

If you know the name of the database you can filter with it like so:

SELECT * FROM pg_stat_activity WHERE datname= '<database name>';

With the entry of the pid column you can terminate or kill the process:

SELECT pg_cancel_backend(<pid>);  # Stop gracefully
SELECT pg_terminate_backend(<pid>);  # Kill

View locks

SELECT * FROM pg_locks;

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