SQL Joins Explained: Master INNER, LEFT, RIGHT, FULL, CROSS & SELF Joins with Examples

Dive into the world of SQL Joins with this comprehensive tutorial. We cover everything you need to know about INNER, LEFT, RIGHT, FULL, CROSS, and SELF Joins, using practical examples and scenarios to help you understand how each join works. 📜 What You'll Learn: INNER JOIN: How to fetch only matching records from two tables. LEFT JOIN: Get all records from the left table plus matching records from the right table. RIGHT JOIN: Get all records from the right table plus matching records from the left table. FULL JOIN: Combine records from both tables, including unmatched rows. CROSS JOIN: Create a Cartesian product of two tables. SELF JOIN: Learn to join a table with itself for complex comparisons. 💻 Hands-On SQL Examples: Scenario 1: Using sales data to demonstrate various joins. Scenario 2: Handling NULL values and zeroes in table joins. Script available :https://shorturl.at/HcNrp SQL Self Join | Most common interview question https://youtu.be/JQO7W8J61Ss SQL Queries by using Joins https://youtu.be/xfBlQ2x7oSg INNER JOIN -- RETURNS Matching records LEFT JOIN / LEFT OUTER JOIN -- Inner Join + all records left over in LEFT table /*== INNER JOIN (All Mathcing Records) + All records from LEFT table which were not returned from Inner join. */ RIGHT JOIN / RIGHT OUTER JOIN -- Inner Join + all records left over in RIGHT table /*== INNER JOIN (All Mathcing Records) + All records from RIGHT table which were not returned from Inner join. */ FULL OUTER JOIN / FULL JOIN /*== INNER JOIN (All Mathcing Records) + All records from LEFT table which were not returned from Inner join. + All records from RIGHT table which were not returned from Inner join. */ SELF JOIN -- When you join a table to itself. NATURAL JOIN -- No recomended CROSS JOIN -- Creates cartisian product. -- Scenario 1 create table table_1 (id int); create table table_2 (id int); insert into table_1 values (1),(1),(1),(2),(3),(3),(3); insert into table_2 values (1),(1),(2),(2),(4),(null); select * from table_1; select * from table_2; Questions. select * from table_1 t1 join table_2 t2 on t1.id = t2.id; select * from table_1 t1 left join table_2 t2 on t1.id = t2.id; select * from table_1 t1 right join table_2 t2 on t1.id = t2.id; select * from table_1 t1 full join table_2 t2 on t1.id = t2.id; select * from table_1 t1 cross join table_2 t2 -- Scenario 2 create table table_1 (id int); create table table_2 (id int); insert into table_1 values (null),(0),(null),(0),(0),(1),(1); insert into table_2 values (1),(0),(0),(0),(null),(null); select * from table_1; select * from table_2; Questions. select * from table_1 t1 join table_2 t2 on t1.id = t2.id; select * from table_1 t1 left join table_2 t2 on t1.id = t2.id; select * from table_1 t1 right join table_2 t2 on t1.id = t2.id; select * from table_1 t1 full join table_2 t2 on t1.id = t2.id; select * from table_1 t1 cross join table_2 t2 Whether you're preparing for an interview or enhancing your SQL skills, this video is your go-to guide for mastering SQL Joins. Don't forget to like, subscribe, and click the bell icon for more in-depth tutorials! Master SQL Joins: Self Joins, Outer Joins, and More! https://youtu.be/xfBlQ2x7oSg SQL Queries Using CTE: Profitability & Monthly Sales Differences https://youtu.be/ttKIVVx3JXQ Calculate User Popularity Percentage with SQL CTEs https://youtu.be/_YzwhLdc5z8 SQL Window Functions Explained: ROW_NUMBER, RANK & DENSE_RANK https://youtu.be/wpLNF5hnPxg SQL Window Functions Explained: LEAD & LAG with Real Examples! https://youtu.be/wfubFMAhEds Master SQL Window Functions: FIRST_VALUE, LAST_VALUE, and More! https://youtu.be/FvV0gFIxdA8 Easily Delete Duplicate Rows in SQL Server with ROW_NUMBER() https://youtu.be/p2ZJu3tu91Q Understanding Recursive CTEs in SQL: A Simple Guide https://youtu.be/9H79g5Hv3hE Master SQL PIVOT: Transform Rows into Columns https://youtu.be/iyDJQFY8LAA SQL Group By Explained with Examples | Master Aggregate Queries https://youtu.be/9nrVo0h7Z8o Mastering SQL: Group By, Having, CASE, Order By, Join, Top, and Limit https://youtu.be/sQv2y1CTJIU Introduction to SQL Normalization: 1NF (First Normal Form) - Part 1 https://youtu.be/r_dHyFqK19g Understanding SQL Normalization: 2NF (Second Normal Form) - Part 2 https://youtu.be/2ZF3NVxYIcE Mastering SQL Normalization: 3NF (Third Normal Form) Explained - Part 3 https://youtu.be/ne-0qFcP3ao Master SQL Subqueries: Scalar, Multi-Row, and Correlated Subqueries Explained https://youtu.be/twAnX7-rAAk SQL Tutorial: Remove Duplicate Data Efficiently | Common Interview Question https://youtu.be/M2lwOXk4ZfA #SQL #SQLJoins #SQLTutorial #Database #LearnSQL #DataAnalysis #SQLQueries"