This document discusses different types of joins in SQL including inner, left, right, and full joins. It provides examples of how joins combine data from two tables, a Persons table and Orders table, based on relationships between columns like Person ID. Inner joins return rows when there is a match in both tables. Left and right joins return all rows from the left or right table, even without matches. Full joins return rows when there is a match in either table.

1. Members
1) Farooq Mian
2) Rukhsana
3) Maryem
Table of Contents
• Inner Join
• Left Join
• Right Join
• Full Join
Topic :- Joins

2. Well often tables are related to each other with keys.
SQL joins are used to query data from two or more
tables, Based a relationship between certain
columns in these tables.

3. Join : Return rows when there is at least one match in
both tables.
Left Join : Returns all rows from the left table, even if
there are no matches in the right table.
Right Join : Returns all rows from the right table, even if
there are no matches in the left table.
Full Join : Return rows when there is a match in one of
the tables.

4. Perons Table
Orders Table
O_id Order_no P_id
1 77895 2
2 44441 3
3 99992 2
4 56789 3
5 113379 1
6 12355 1
P_id LastName FirstName Address City
1 Mian Farooq Shadman Lahore
2 Nawaz Fawad Walton Lahore
3 Mian Ahmed Gulberg Karachi
4 Ali Asad DHA Lahore