How to use Keys and Constraints in Postgresql?
In this video, i’ll show you how to use Keys and Constraints in Postgresql using pgadmin 4. We’ll add a not-null constraint, a unique constraint, a check constraint, a primary key.
✔️If you’re working with PostgreSQL, then you know that it has Keys and Constraints, that are rules that define what data values are allowed in certain columns.
✔️ We’ll discuss the most common constraint, use in the real application and compare them.This video is perfect if you’re looking to learn more about PostgreSQL constraints!
By the end of this video, you’ll have a good understanding of how Keys and Constraints work in Postgresql and be able to use them to ensure the integrity of your data. If you’re looking to improve your Postgresql knowledge, then this video is for you!
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⏱TIMESTAMPS⏱:
00:00 Introduction
00:43 What are the Keys and Constraints ?
01:23 Keys: Primary and Foriegn
02:41 Primary key practice
07:58 Not-Null Constraint
11:41 Default value example
14:55 Unique Constraint
15:49 Priamry Key vs Unique Constraint
16:42 Unique Constraint example
19:43 Check Constraint
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😍🐘Link to PostgreSQL official documentation: https://www.postgresql.org/docs/current/ddl-constraints.html#DDL-CONSTRAINTS-UNIQUE-CONSTRAINTS
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#postgresql #constraints #primarykey #unqiueconstraint