SQL Constraints, Aliases & Operators Explained with Examples | SQL Basic To Advance |Creative Notes

In this video, you will learn Oracle SQL Constraints and Operators with clear explanations and practical examples. This session is specially designed for students, beginners, and exam preparation.

We cover all important SQL concepts step by step, including constraints, aliases, arithmetic operators, logical operators, set operators, and special operators using real SQL queries.

📚 Topics Covered in This Video

🔹 Oracle SQL Constraints

NOT NULL Constraint
PRIMARY KEY Constrain
UNIQUE Constraint
FOREIGN KEY Constraint
CHECK Constraint
Constraints using CREATE and ALTER

🔹 SQL Aliases

Column Alias
Table Alias
Practical examples

🔹 SQL Operators

Arithmetic Operators
Comparison Operators
Logical Operators

🔹 Set Operators

UNION
UNION ALL
INTERSECT
MINUS

🔹 Special Operators

IN / NOT IN
BETWEEN / NOT BETWEEN
LIKE / NOT LIKE
IS NULL / IS NOT NULL
EXISTS

🔹 Practice Queries

Real-time examples using EMP, AGENTS, CUSTOMERS, ORDERS tables

👉 What you’ll learn in this Oracle SQL Tutorial :

00:00:00 – Introduction to SQL Concepts

00:00:12 – What are Oracle SQL Constraints?

00:00:16 – Types of Constraints in Oracle

00:00:31 – NOT NULL Constraint (Explanation & Example)

00:01:32 – PRIMARY KEY Constraint

00:02:35 – UNIQUE Constraint (Inline & Out-of-line)

00:03:59 – FOREIGN KEY Constraint

00:05:48 – CHECK Constraint

00:07:35 – Summary of Constraints (CREATE & ALTER)

00:08:41 – SQL Aliases Introduction

00:09:02 – Column Alias with Examples

00:09:51 – Table Alias with Examples

00:10:26 – Introduction to SQL Operators

00:10:46 – Arithmetic Operators with Examples

00:11:50 – Comparison (Relational) Operators

00:12:32 – Logical Operators (AND, OR, NOT)

00:15:08 – Set Operators (UNION, UNION ALL, INTERSECT, MINUS)

00:16:57 – Special Operators

00:25:05 – Practice Questions & Queries

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