ultimate-mysql-bootcamp/02_retrieving_data_from_multiple_table at main · HashimThePassionate/ultimate-mysql-bootcamp

Name		Name	Last commit message	Last commit date
parent directory ..
01_inner_joins		01_inner_joins
02_joining_across_databases		02_joining_across_databases
03_self_joins		03_self_joins
04_joining_multiple_tables		04_joining_multiple_tables
05_implicit_join_syntax		05_implicit_join_syntax
06_outer_joins		06_outer_joins
07_outer_join_between_multiple_tables		07_outer_join_between_multiple_tables
08_self_outer_joins		08_self_outer_joins
09_the_using_clause		09_the_using_clause
10_cross_joins		10_cross_joins
11_unions		11_unions
12_left_and_right_join		12_left_and_right_join
readme.md		readme.md

readme.md

Retrieving data from multiple tables is a fundamental operation in relational databases, often accomplished using SQL JOIN operations.

To retrieve data from multiple tables, SQL uses JOIN operations. The most common types of JOINs are:

INNER JOIN: Returns only the rows that have matching values in both tables.
LEFT JOIN: Returns all rows from the left table (first table specified) and matching rows from the right table.
RIGHT JOIN: Returns all rows from the right table and matching rows from the left table.
Retrieving data from multiple tables allows you to access and analyze related information efficiently. Understanding the database schema, relationships, and how to use JOIN operations effectively are key skills in working with relational databases.