Skip to content
Courses
DSA to Development
Get IBM Certification
Newly Launched!
Master Django Framework
Become AWS Certified
For Working Professionals
Interview 101: DSA & System Design
Data Science Training Program
JAVA Backend Development (Live)
DevOps Engineering (LIVE)
Data Structures & Algorithms in Python
For Students
Placement Preparation Course
Data Science (Live)
Data Structure & Algorithm-Self Paced (C++/JAVA)
Master Competitive Programming (Live)
Full Stack Development with React & Node JS (Live)
Full Stack Development
Data Science Program
All Courses
Tutorials
Data Structures & Algorithms
ML & Data Science
Interview Corner
Programming Languages
Web Development
CS Subjects
DevOps And Linux
School Learning
Practice
Build your AI Agent
GfG 160
Problem of the Day
Practice Coding Problems
GfG SDE Sheet
Contests
Accenture Hackathon (Ending Soon!)
GfG Weekly [Rated Contest]
Job-A-Thon Hiring Challenge
All Contests and Events
DSA
Practice Problems
Python
C
C++
Java
Courses
Machine Learning
DevOps
Web Development
System Design
Aptitude
Projects
Sign In
▲
Similar Topics
Web Technologies
40.3k+ articles
DSA
22.3k+ articles
Python
20.1k+ articles
Experiences
17k+ articles
Interview Experiences
13.6k+ articles
School Learning
11.7k+ articles
JavaScript
11.5k+ articles
Java
10.1k+ articles
Databases
2.3k+ articles
PostgreSQL
380+ articles
postgreSQL-constraints
5 posts
Popular Articles
Recent Articles
PostgreSQL - CHECK Constraint
Last Updated: 06 August 2024
In PostgreSQL, the CHECK constraint is a powerful tool used to enforce data integrity by specifying that a value in a column must meet a spe
...read more
PostgreSQL
postgreSQL-constraints
PostgreSQL - UNIQUE Constraint
Last Updated: 13 August 2024
In PostgreSQL, the UNIQUE constraint is a powerful tool used to ensure that values stored in a column or a group of columns are unique acros
...read more
PostgreSQL
postgreSQL-constraints
PostgreSQL - Primary Key
Last Updated: 18 November 2024
A primary key in PostgreSQL is a column (or a set of columns) that uniquely identifies each row in a table. It is an important component for
...read more
PostgreSQL
postgreSQL-constraints
Databases
Similar Topics
Web Technologies
40.3k+ articles
DSA
22.3k+ articles
Python
20.1k+ articles
Experiences
17k+ articles
Interview Experiences
13.6k+ articles
School Learning
11.7k+ articles
JavaScript
11.5k+ articles
Java
10.1k+ articles
Databases
2.3k+ articles
PostgreSQL
380+ articles
PostgreSQL - NOT NULL Constraint
Last Updated: 08 July 2024
In PostgreSQL, the NOT NULL constraint is a fundamental feature to ensure that a column cannot contain NULL values. NULL represents unknown
...read more
PostgreSQL
postgreSQL-constraints
PostgreSQL - DISTINCT ON expression
Last Updated: 11 October 2024
The DISTINCT ON clause in PostgreSQL allows us to retrieve unique rows based on specific columns by offering more flexibility than the stand
...read more
PostgreSQL
postgreSQL-constraints
Databases
1
1
1
We use cookies to ensure you have the best browsing experience on our website. By using our site, you acknowledge that you have read and understood our
Cookie Policy
&
Privacy Policy
Got It !