To lock a Postgres user, the “ALTER USER” statement can be used with the “NOLOGIN” clause. While a user can be unlocked by using the “ALTER USER” command with the “LOGIN” attribute.
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How to Check if a User is Connected to the PostgreSQL Server or Not
In Postgres, to check the active users via the “pg_stat_activity”, use the “SELECT usename, datname, state FROM pg_stat_activity WHERE usename='user_name';” command.
How to Grant Permissions on all Tables to a PostgreSQL User
In PostgreSQL, the GRANT statement is utilized along with the “ON ALL TABLES” clause to assign permissions on all tables to single or multiple users.
How to Change the Table Owner in PostgreSQL
To change or modify the table’s owner in PostgreSQL, use the “ALTER TABLE tab_name OWNER TO new_owner_name;” command.
How to Grant All Privileges on Schema to User in PostgreSQL
In PostgreSQL, the “GRANT ALL” statement is utilized along with the “ON ALL TABLES IN SCHEMA” clause to assign permissions on the schema to single or multiple users.
How to Get the List of Privileges Assigned to a Table in PostgreSQL
In PostgreSQL, the “\z” command and “information_schema” can be used to check the list of assigned privileges to a certain Postgres table.
How to Get or Check Table Structure in PostgreSQL
In PostgreSQL, the “\d”, the “\d+”, “information_schema”, and the “SELECT *” statement with the “FALSE” option are used to check the table’s structure.
How to Use REVERSE() Function in PostgreSQL
The REVERSE() function accepts exactly one argument and that must be a string. As a result, it retrieves the given string in reverse order.
PostgreSQL STRING_TO_TABLE() Function With Examples
The STRING_TO_TABLE() function accepts a string and a delimiter as arguments and splits the given string based on the specified delimiter.
How to Order by Count in PostgreSQL?
In PostgreSQL, the ORDER BY clause is used along with the COUNT() function to retrieve the table’s records by count/quantity.
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