ALTER USER username
[ WITH PASSWORD 'password' ]
[ CREATEDB | NOCREATEDB ] [ CREATEUSER | NOCREATEUSER ]
[ VALID UNTIL 'abstime' ]
The name of the user whose details are to be altered.
The new password to be used for this account.
These clauses define a user's ability to create databases. If CREATEDB is specified, the user being defined will be allowed to create his own databases. Using NOCREATEDB will deny a user the ability to create databases.
These clauses determine whether a user will be permitted to create new users himself. This option will also make the user a superuser who can override all access restrictions.
The date (and, optionally, the time) at which this user's password is to expire.
ALTER USER is used to change the attributes of a user's Postgres account. Only a database superuser can change privileges and password expiration with this command. Ordinary users can only change their own password.
Use CREATE USER to create a new user and DROP USER to remove a user.
Change a user password:
ALTER USER davide WITH PASSWORD 'hu8jmn3';Change a user's valid until date:
ALTER USER manuel VALID UNTIL 'Jan 31 2030';Change a user's valid until date, specifying that his authorization should expire at midday on 4th May 1998 using the time zone which is one hour ahead of UTC:
ALTER USER chris VALID UNTIL 'May 4 12:00:00 1998 +1';Give a user the ability to create other users and new databases:
ALTER USER miriam CREATEUSER CREATEDB;