# Let's learn InnoDB!

#database #mysql

Introduction

Are you familiar with InnoDB? I don't understand it well...
If you don't, let's learn InnoDB with me!😀

What's InnoDB

InnoDB is a general-purpose storage engine that balances high reliability and high performance.

In MySQL 8.0, InnoDB is the default MySQL storage engine.

Benefits of using InnoDB

Safety operation

Its DML operations follow the ACID model, with transactions featuring commit, rollback, and crash-recovery capabilities to protect user data.

The ACID model means the following.

A: atomicity
C: consistency
I: isolation
D: durability

To maintain data integrity, InnoDB also supports FOREIGN KEY constraints. With foreign keys, inserts, updates, and deletes are checked to ensure they do not result in inconsistencies across related tables.

High performance

Row-level locking and Oracle-style consistent reads increase multi-user concurrency and performance.

InnoDB tables arrange your data on disk to optimize queries based on primary keys. Each InnoDB table has a primary key index called the clustered index that organizes the data to minimize I/O for primary key lookups.

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