Experts in Postgres and Open Source Infrastructure

24x7, 365 Enterprise services since 1997


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 the UNION Clause/Operator in PostgreSQL

In PostgreSQL, the UNION clause/operator combines the result sets of two or more queries. It doesn’t return the duplicated rows in the combined set.

PostgreSQL ROUND() Function With Examples

PostgreSQL provides a built-in function named the ROUND() function that accepts either one or two arguments/values. It rounds a number to the nearest integer.

How to Convert a String to a Number in PostgreSQL

Specify a string followed by “::” and then write the data type to convert the given string into the targeted type like integer, decimal, or double precision.

How to Use TO_NUMBER() Function in PostgreSQL

TO_NUMBER() is used to convert a character string to a number. The TO_NUMBER() function accepts two parameters, a “string” and a “format”.

PostgreSQL BOOLEAN Data Type With Examples

In PostgreSQL, the BOOLEAN or BOOL data type takes only 1 byte to store a value in a database, and it returns one of two probable values: True or False.

PostgreSQL BIGINT Data Type With Examples

BIGINT is a numeric data type in PostgreSQL that stores the integer values. It stores a value between -9,223,372,036,854,775,808 to +9,223,372,036,854,775,807.

What Does DROP TABLE CASCADE do in PostgreSQL

In PostgreSQL, the CASCADE option is used with the DROP TABLE command to drop/delete a table along with its dependent objects.

How to Alter Column Type in PostgreSQL

To alter column’s type in PostgreSQL, use the “SET DATA TYPE” or “TYPE” keyword with the ALTER TABLE and ALTER COLUMN commands.

How to Use DATE_PART() Function in PostgreSQL

DATE_PART() function in PostgreSQL is used to extract/retrieve a specific part(like a month, year, hour, minutes, etc.) from a TIMESTAMP/Source.

How to Format a Date in PostgreSQL

In PostgreSQL, the NOW() and CURRENT_DATE functions are used with the collaboration of the TO_CHAR() function to get the current date in a specific format.