Date & Time Psql Commands - (PostgreSQL Advance)

PostgreSQL provides powerful features for working with date and time. In this tutorial, we'll explore some of the most useful PostgreSQL commands for working with date and time values.

Syntax

CURRENT_DATE

SELECT CURRENT_DATE;

CURRENT_TIME

SELECT CURRENT_TIME;

CURRENT_TIMESTAMP

SELECT CURRENT_TIMESTAMP;

DATE_PART

SELECT DATE_PART('part', timestamp);

Example

Let's take a look at some examples of using PostgreSQL commands for working with date and time values.

CURRENT_DATE

This command returns the current date.

SELECT CURRENT_DATE;

The output of this query would be something like:

2022-09-28

CURRENT_TIME

This command returns the current time.

SELECT CURRENT_TIME;

The output of this query would be something like:

22:30:15.729644

CURRENT_TIMESTAMP

This command returns the current timestamp.

SELECT CURRENT_TIMESTAMP;

The output of this query would be something like:

2022-09-28 22:30:43.707427

DATE_PART

This command allows you to extract a specific part of a date or timestamp.

SELECT DATE_PART('hour', '2022-09-28 22:30:43.707427');

The output of this query would be:

22

Explanation

In the above examples, we used the PostgreSQL commands CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, and DATE_PART to work with date and time values.

CURRENT_DATE returns the current date, CURRENT_TIME returns the current time, and CURRENT_TIMESTAMP returns the current timestamp.

DATE_PART allows you to extract a specific part of a date or timestamp, such as the hour or minute.

Use

PostgreSQL commands for working with date and time values are useful when working with applications that require working with date and time data. They are especially useful for building applications that require complex date and time calculations and manipulations.

Important Points

• Date and time values are stored in PostgreSQL in a format similar to ISO 8601, which is a standardized date and time format.
• PostgreSQL provides a range of built-in functions for working with date and time values, including CURRENT_DATE, CURRENT_TIME, CURRENT_TIMESTAMP, and DATE_PART.
• DATE_PART allows you to extract specific parts of a date or timestamp, such as the year or hour.

Summary

In this tutorial, we explored some of the most useful PostgreSQL commands for working with date and time values. We discussed the syntax, examples, output, explanation, use, and important points of using PostgreSQL commands for working with date and time values. With this knowledge, you can now use PostgreSQL commands to work with date and time data in your PostgreSQL database and applications.