How to Repair a Corrupted MySQL Table

[Administrator]

Introduction
MySQL is a Relational Database Management System (RDBMS). An RDBMS is a database management system (DBMS) that stores related data in tables. These tables form rows called records and columns called attributes, with a unique key identifying each row.

RDMSes such as MySQL include functionality to preserve data integrity, consistency, and accuracy. CRUD (Create, Read, Update, Delete) transactions execute on RDBMS using SQL, following the ACID (Atomicity, Consistency, Isolation, Durability) mechanism.

Atomicity - A CRUD transaction takes place in its entirety or it doesn't happen at all.
Consistency - Data is in a consistent state when a CRUD transaction starts and ends.
Isolation - Ensures concurrent transactions without leading to inconsistency. The intermediate transaction state is invisible to other transactions until it's committed.
Durability - After a CRUD transaction completes successfully, the changes persist even in a system failure.
This helps the system achieve consistency and stability.

This guide covers how to fix a corrupted MySQL table.

Prerequisites
Working knowledge of SQL.
Properly installed MySQL.
System running Linux like Ubuntu.
Causes of Corruption
Table corruption leads to data held within them being unreadable, with attempts to read data leading to the MySQL server crashing. Common causes of MySQL table corruption include:

Server hardware failure.
Unexpected machine shutdown.
The MySQL server stopped in the middle of a write.
Using 3rd party software to access the database.
Software bugs within the MySQL code.
Wrong data schema.
Fixing Table Corruption
Before attempting to fix or troubleshoot problems, create a backup of your data directory to reduce the risk of data loss.