Master MySQL Step‑by‑Step: From Beginner to Expert

Level 1: Simple Hands‑On

Install the latest MySQL 8.0, choose a client such as Navicat, and learn basic data types, table operations, and simple SQL statements. The first seven chapters of "MySQL is How to Use: Quick Start" are recommended for foundational knowledge.

Level 2: Proficient Use

Master CRUD SQL, including complex multi‑table joins and subqueries. Learn to add indexes and understand basic indexing concepts, recognizing that indexed fields improve query speed. Gain knowledge of schema design, normalization, ACID properties, and note that stored procedures, views, and triggers are rarely required in most companies.

Level 3: Understanding the Internals

Dive into MySQL lock mechanisms—optimistic, pessimistic, shared, exclusive, record, gap, next‑key, intention, insert‑intention, row, table, page, auto‑increment, deadlock, etc. Study index mechanisms such as B‑tree, hash, clustered, non‑clustered, prefix, covering, and composite indexes. Explore transaction and log systems, including isolation levels, MVCC, redo log, undo log, binlog, mini‑transaction, dirty reads, phantom reads, and non‑repeatable reads. Also cover storage architecture (pages, extents, segments, tablespaces) and buffer pool.

Level 4: Deep Optimization

Apply practical performance tuning: design table structures tailored to business scenarios, use vertical/horizontal sharding, avoid lock contention, and handle many‑to‑many or parent‑child relationships efficiently. Optimize slow queries by analyzing execution plans, adding composite indexes, using FORCE INDEX, STRAIGHT_JOIN, or rewriting SQL. Diagnose and resolve deadlocks, and troubleshoot production bottlenecks. For large‑scale systems, propose solutions that combine MySQL with Redis, Elasticsearch, Kafka, Doris, or ClickHouse while minimizing consistency issues.

Level 5: Product Re‑building

When MySQL lacks required features, form a team to modify the source code or build a custom storage engine. The author highlights three seminal MySQL books—"High Performance MySQL (3rd Edition)", "MySQL Internals: InnoDB Storage Engine (2nd Edition)", and "MySQL Kernel: InnoDB Storage Engine"—as essential reading, along with the official MySQL Internals Manual. Additional recommended texts include "Database System Concepts", "Database Index Design and Implementation", and "Database System Implementation". Readers are encouraged to read source code and even contribute patches.