How to Cast String Into Int In Postgresql?

Best PostgreSQL Data Conversion Tools to Buy in September 2026

1

PostgreSQL for Absolute Beginners: A Hands-On Guide to SQL, Tables, Queries, Relationships, and Building Your First Database

BUY & SAVE

$4.50

2

Beginning Databases with PostgreSQL: From Novice to Professional (Beginning From Novice to Professional) (Volume 0)

• AFFORDABLE PRICES ON QUALITY USED BOOKS FOR BUDGET-CONSCIOUS READERS.
• ECO-FRIENDLY CHOICE: REDUCE WASTE BY BUYING PRE-LOVED BOOKS.
• UNIQUE SELECTION: DISCOVER HIDDEN GEMS YOU WON'T FIND ELSEWHERE.

BUY & SAVE

$64.02 $89.99

Save 29%

3

High-Performance PostgreSQL: The Engineering Guide: Master Tuning, Internal Architecture, Advanced Indexing, and Scaling for Critical Databases (Big Tech Career & System Design Book 3)

BUY & SAVE

$2.99

4

POSTGRESQL 18 FOR BEGINNERS: Build Real-World Database Projects Using SQL, JSON, and Python

BUY & SAVE

$6.50

5

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

BUY & SAVE

$36.26 $38.99

Save 7%

6

Century Drill & Tool 72898 Post Level

• HANDS-FREE LEVELING: MAGNETIC STRIPS AND ELASTIC STRAP FOR EASY USE.
• VERSATILE APPLICATION: PERFECT FOR ANY POST, POLE, OR STRUCTURE INSTALLATION.
• TRIPLE VIALS FOR PRECISION: ENSURE ACCURACY FROM ALL ANGLES WITH EASY READINGS.

BUY & SAVE

$8.29 $12.99

Save 36%

7

Mastering PostgreSQL: From Novice to Pro with the Power of PostgreSQL 17

BUY & SAVE

$7.99

8

Mastering Node.js and Express.js with PostgreSQL: The Complete Step-by-Step Guide for Web Developers

BUY & SAVE

$7.98

9

Procedural Programming with PostgreSQL PL/pgSQL: Design Complex Database-Centric Applications with PL/pgSQL (Professional and Applied Computing)

BUY & SAVE

$39.91 $54.99

Save 27%

10

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

BUY & SAVE

$7.99

+

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.