Skip to main content
PHP Blog

Back to all posts

How to Cast String Into Int In Postgresql?

Published on
3 min read
How to Cast String Into Int In Postgresql? image

Best PostgreSQL Data Conversion Tools to Buy in October 2025

1 Full-Stack Web Development with TypeScript 5: Craft modern full-stack projects with Bun, PostgreSQL, Svelte, TypeScript, and OpenAI

Full-Stack Web Development with TypeScript 5: Craft modern full-stack projects with Bun, PostgreSQL, Svelte, TypeScript, and OpenAI

BUY & SAVE
$36.26
Full-Stack Web Development with TypeScript 5: Craft modern full-stack projects with Bun, PostgreSQL, Svelte, TypeScript, and OpenAI
2 PostgreSQL: A Practical Guide for Developers and Data Professionals

PostgreSQL: A Practical Guide for Developers and Data Professionals

BUY & SAVE
$5.99
PostgreSQL: A Practical Guide for Developers and Data Professionals
3 Procedural Programming with PostgreSQL PL/pgSQL: Design Complex Database-Centric Applications with PL/pgSQL

Procedural Programming with PostgreSQL PL/pgSQL: Design Complex Database-Centric Applications with PL/pgSQL

BUY & SAVE
$39.91
Procedural Programming with PostgreSQL PL/pgSQL: Design Complex Database-Centric Applications with PL/pgSQL
4 Beginning PHP and PostgreSQL 8: From Novice to Professional (Beginning: From Novice to Professional)

Beginning PHP and PostgreSQL 8: From Novice to Professional (Beginning: From Novice to Professional)

  • AFFORDABLE PRICING FOR QUALITY USED BOOKS BOOSTS VALUE FOR READERS.
  • ECO-FRIENDLY CHOICE PROMOTES SUSTAINABILITY WHILE ENJOYING LITERATURE.
  • GOOD CONDITION ENSURES RELIABLE READING EXPERIENCE WITHOUT BREAKING BUDGET.
BUY & SAVE
$35.25 $49.99
Save 29%
Beginning PHP and PostgreSQL 8: From Novice to Professional (Beginning: From Novice to Professional)
5 DEUOTION T-post Clips Tool, Fixing Fence Clip and Wire Steel Bender T-post Handheld Twisting Tool, Multi Functional Bender

DEUOTION T-post Clips Tool, Fixing Fence Clip and Wire Steel Bender T-post Handheld Twisting Tool, Multi Functional Bender

  • RAPIDLY SECURE T-POST CLIPS, SAVING TIME ON INSTALLATION!

  • EASY-TO-USE DESIGN MAKES IT PERFECT FOR ALL SKILL LEVELS.

  • DURABLE STEEL CONSTRUCTION ENSURES LONGEVITY FOR YOUR FENCING NEEDS!

BUY & SAVE
$16.99
DEUOTION T-post Clips Tool, Fixing Fence Clip and Wire Steel Bender T-post Handheld Twisting Tool, Multi Functional Bender
6 Mastering PostgreSQL for Developers: Building Fast, Secure, and Scalable Apps

Mastering PostgreSQL for Developers: Building Fast, Secure, and Scalable Apps

BUY & SAVE
$6.77
Mastering PostgreSQL for Developers: Building Fast, Secure, and Scalable Apps
7 PostgreSQL for Python Web Development with Flask: A Practical Guide to Building Database-Driven Web Applications

PostgreSQL for Python Web Development with Flask: A Practical Guide to Building Database-Driven Web Applications

BUY & SAVE
$7.99
PostgreSQL for Python Web Development with Flask: A Practical Guide to Building Database-Driven Web Applications
8 Century Drill & Tool 72898 Post Level

Century Drill & Tool 72898 Post Level

  • HANDS-FREE LEVELING WITH MAGNETS AND STRAPS FOR EFFORTLESS USE.
  • PERFECT FOR VARIOUS INSTALLATIONS-FENCES, POLES, DECKS, AND MORE!
  • TRIPLE VIALS ENSURE PRECISE LEVELING FROM MULTIPLE ANGLES EASILY.
BUY & SAVE
$11.98
Century Drill & Tool 72898 Post Level
9 Lind Kitchen 2PCS High-tensile Wire Tool Twisting Too Fencing Tool Wire Twister Multi-Functional Bender for Fixing Fence Wire and Wire Clip

Lind Kitchen 2PCS High-tensile Wire Tool Twisting Too Fencing Tool Wire Twister Multi-Functional Bender for Fixing Fence Wire and Wire Clip

  • DURABLE STEEL CONSTRUCTION: CORROSION-RESISTANT FOR LONG-LASTING USE.

  • VERSATILE HOLE SIZES: FITS VARIOUS WIRE DIAMETERS FOR EASY USE.

  • COMPACT DESIGN: PORTABLE TOOL SAVES TIME AND BOOSTS WORK EFFICIENCY.

BUY & SAVE
Lind Kitchen 2PCS High-tensile Wire Tool Twisting Too Fencing Tool Wire Twister Multi-Functional Bender for Fixing Fence Wire and Wire Clip
10 Pull A Post The Original Fence Post Removal Tool Galvanized Cable & 1/4 Chain, Works with Jack or Lever to Remove Wood Fence Posts Even if Broken Designed for Fence Repair & Replacement

Pull A Post The Original Fence Post Removal Tool Galvanized Cable & 1/4 Chain, Works with Jack or Lever to Remove Wood Fence Posts Even if Broken Designed for Fence Repair & Replacement

  • STRONG & DURABLE: 4200 LBS CABLE, 5200 LBS CHAIN FOR RELIABLE FENCE REPAIRS.

  • EASY EXTRACTION: QUICK POST REMOVAL USING LEVERAGE WITH MINIMAL EFFORT.

  • LIGHTWEIGHT & PORTABLE: WEIGHS UNDER 2 LBS FOR HASSLE-FREE TRANSPORT TO JOB SITES.

BUY & SAVE
$36.99
Pull A Post The Original Fence Post Removal Tool Galvanized Cable & 1/4 Chain, Works with Jack or Lever to Remove Wood Fence Posts Even if Broken Designed for Fence Repair & Replacement
+
ONE MORE?

In PostgreSQL, you can cast a string into an integer by using the CAST function or the :: operator. For example, if you have a string '123' and you want to convert it into an integer, you can do so by using either of the following queries:

  1. Using the CAST function: SELECT CAST('123' AS INTEGER);
  2. Using the :: operator: SELECT '123'::INTEGER;

Both of these queries will convert the string '123' into an integer value of 123.

What is the function for converting string to int in PostgreSQL?

The function for converting a string to an integer in PostgreSQL is CAST().

To convert a string to an integer, you would use the following syntax:

SELECT CAST('123' AS INTEGER);

This would convert the string '123' to an integer value of 123.

How do I cast a text field to an integer in PostgreSQL?

To cast a text field to an integer in PostgreSQL, you can use the CAST function. Here is an example query that demonstrates how to cast a text field to an integer:

SELECT CAST(text_field_name AS INTEGER) FROM your_table_name;

In this query, replace text_field_name with the name of the text field you want to cast to an integer, and your_table_name with the name of your table. The CAST function converts the text field values to integers, allowing you to perform integer operations and comparisons.

How to transform a varchar to an integer in PostgreSQL?

In PostgreSQL, you can use the CAST function to convert a varchar to an integer. Here's an example:

SELECT CAST('123' AS INTEGER);

This will convert the string '123' to an integer value of 123. You can also use the :: syntax to achieve the same result:

SELECT '123'::INTEGER;

Both of these queries will return an integer value of 123.

How do you change a string to an integer in PostgreSQL?

In PostgreSQL, you can change a string to an integer by using the CAST() function or the :: syntax.

Here is an example using the CAST() function:

SELECT CAST('123' AS INTEGER);

Here is an example using the :: syntax:

SELECT '123'::INTEGER;

Both of these queries will convert the string '123' to an integer value of 123.

What is the best approach for casting a string into an integer in PostgreSQL?

The best approach for casting a string into an integer in PostgreSQL is to use the CAST function.

Here is an example of how to use the CAST function to cast a string into an integer:

SELECT CAST('42' AS INTEGER);

This query will return the integer value 42 after casting the string '42' into an integer.

Alternatively, you can also use the :: cast operator to cast a string into an integer:

SELECT '42'::INTEGER;

Both methods will convert the string into an integer in PostgreSQL.