Experts in Postgres and Open Source Infrastructure

24x7, 365 Enterprise services since 1997

Education

Professional Postgres and Open Source support

Command Prompt, Inc., is the oldest Postgres Company in North America and one of the oldest Open Source firms still operating today. We serve our clients with best in class expertise and professionalism. You can read more about support and services here:


You have landed at the largest single source of Postgres education blogs in the world. At Command Prompt, we believe deeply that the education of the community is critical to the continued success of Postgres and related technologies. We hope you find content you are looking for and don't hesitate to Contact us today for all your Postgres and Open Source consulting and support needs.

How to Use ABS() Function in PostgreSQL

PostgreSQL offers a built-in mathematical function named ABS() that takes an expression as an argument and retrieves an absolute value for the specified number.

How to Round Numbers in PostgreSQL

PostgreSQL offers several built-in math functions such as ROUND(), CEIL(), and FLOOR() to round a number up to specific decimal places.

How to Optimize Postgres Performance Using ANALYZE and VACUUM Commands

PostgreSQL offers several commands to optimize, improve or maintain the health of a database, tables, etc., such as ANALYZE and VACUUM commands.

How to Use VACUUM Command in PostgreSQL

In Postgres, VACUUM is a command-line utility that vacates the space engaged by obsolete records, tuples, etc. It optimizes the performance of the Postgres databases, records, etc.

How to Use MOD() Function in PostgreSQL?

The MOD() function is one of the built-in mathematical functions in Postgres that perform the modulo operation on two numbers and retrieves the remainder.

How to Use ANALYZE Command in PostgreSQL

PostgreSQL offers a convenient command named ANALYZE that collects the statistics about a database, table, or table’s columns for the query planner.

PostgreSQL Column Alias With Practical Examples

In PostgreSQL, column aliases are temporary alternative names assigned to columns. The aliases are temporary alternatives, so they exist temporarily during the query’s execution.

How to Find Duplicate Rows in PostgreSQL

PostgreSQL offers several built-in functions to find duplicate rows/records from a table, such as ROW_NUMBER() and COUNT().

PostgreSQL ISNULL Function With Examples

PostgreSQL doesn’t support the ISNULL function. To achieve the functionality of the ISNULL function in Postgres, COALESCE function and CASE expressions are used.

How to Use NULLIF Function in PostgreSQL

NULLIF takes some arguments and returns a NULL value if both arguments are equal or if one of them is NULL, and it returns first argument if both arguments are not equal.