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How to Use TRUNC() Function in PostgreSQL

In PostgreSQL, TRUN() function is one of the math functions that accept a numeric value and truncates its entire fractional part or up to specific decimal places.

How to Use Temporary Table in PostgreSQL

The “CREATE TEMP TABLE” command is used to create the temporary table in the PostgreSQL. This table will be removed after terminating the current session.

PostgreSQL List All Tables

In Postgres, an SQL command: “\dt” and a couple of built-in schemas: pg_catalog and information_schema, are used to list all the tables of a database.

How to Alter Role in PostgreSQL

Postgres provides the “ALTER ROLE” statement to alter an existing role with a new role. Using this, users can change the name and attributes of any existing role.

How to Use GRANT Statement in PostgreSQL

In PostgreSQL, users can access and override the privileges/rights of the database objects through the “GRANT” statement.

How to Use REVOKE Privileges in PostgreSQL

In PostgreSQL, the “REVOKE” statement is quite helpful in revoking the granted privileges from single or multiple roles.

How to Drop Roles in PostgreSQL

In Postgres, the DROP ROLE statement is used to drop an existing role with its attributes. In the case of dependent objects, the DROP OWNED statement is used.

How to Show Users in PostgreSQL

In PostgreSQL, the “\du” and “\du+” statements are used to show the list of users along with their attributes and descriptions.

How to Drop Schema in PostgreSQL

To drop a schema in Postgres, the DROP SCHEMA statement is used. A schema is a collection of several objects, so dropping a schema will drop all the objects present in it.


PostgreSQL offers an “ALTER SCHEMA” statement that is used to modify the schema’s definition, such as altering the schema’s owner, renaming a schema, etc.