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PostgreSQL LENGTH() Function With Practical Examples

The Postgres LENGTH() function accepts a string as an argument and calculates the total number of characters in that particular string.

How to Get Table Size in PostgreSQL

PostgreSQL provides a pg_relation_size() function to get the size of a particular table. The “pg_size_pretty()” function is used to get the table’s size in a human-readable format like KBs, MBs.

How to Rename Databases in PostgreSQL?

To rename a database in Postgres, specify an ALTER DATABASE command, followed by the database’s old name, and after that, specify the RENAME TO clause followed by the database’s new/modified name.

PostgreSQL CURRENT_DATE Function With Practical Examples

CURRENT_DATE is one of the Postgres built-in date functions that retrieve the current/today’s date. It doesn’t take any argument.

How to Grant All Privileges to Users in PostgreSQL

PostgreSQL offers a GRANT statement that is used to assign privileges to the database objects. In Postgres, you can grant all privileges to a user via the "GRANT ALL" statement.


UNIQUE constraints can be dropped by running the ALTER TABLE command with the "DROP CONSTRAINT" clause followed by the constraint’s name.

PostgreSQL DIV() Function With Practical Examples

PostgreSQL provides a built-in DIV() function that takes two numeric values as arguments, performs division on them, and retrieves the resultant integer.


Postgres doesn’t support the “IF NOT EXISTS” option for the CREATE DATABASE command. To achieve the functionality of the “IF NOT EXISTS” option, a subquery can be used in Postgres.

How to Comment in PostgreSQL

In Postgres, double hyphen “--” sign is used for single-line comments, while to use multi-line comments, you need to enclose the comments within “/*” and “*/”.

How to Create Arrays in PostgreSQL

To create an array in Postgres, users must specify the column name, then the data type, followed by the square brackets “[]”.