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This is the Education section of the Command Prompt Website. Here you will find blogs specifically about how to use Postgres and related technologies.

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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.

How to Rename a Schema in PostgreSQL

In PostgreSQL, the “ALTER SCHEMA” statement is used with the collaboration of the “RENAME TO” statement to rename a particular schema.

How to Create Schema in PostgreSQL

In PostgreSQL, the “CREATE SCHEMA” statement is used to create a schema. A schema is a namespace that offers various objects, such as tables, views, indexes etc.

How to Create Roles in PostgreSQL

In PostgreSQL, the CREATE ROLE statement is used with different role attributes to create a role with specific privileges such as SUPERUSER, CONNECTION LIMIT, etc.


Postgres doesn’t offer the “IF NOT EXISTS” option for the INSERT query. Alternatively, you can use the subquery to check the existence of a specific record.


In Postgres, the TEXT data type accepts unlimited characters, while the behavior of the VARCHAR data type depends on its length parameter.

PostgreSQL Character Data Types: CHAR, VARCHAR, and TEXT

PostgreSQL provides several data types to work with the character/textual data, such as CHAR, TEXT, and VARCHAR. All these data types differ in length.

PostgreSQL TEXT Data Type With Examples

The TEXT data type is one of the character data types in PostgreSQL that is used to store an unlimited number of characters. It is used to create variable-length strings.