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Home / Indexes / Question No: 136

How many types of indexes or keys are in MySQL?

I want to optimize my database. So I need to learn about INDEXES or KEYS in MySQL. Can you explain that how many types of INDEXES or KEYS are in MySQL?

Answer No: 136

MySQL allows four general types of indexes (keys). These indexes can be created either on single column or multi-columns however both single column index and multi columns index have some different behaviors.

Primary Key Indexes

Unique Key Indexes

Normal Indexes also known as "Non-Unique Indexes", "Ordinary Indexes", or "Indexes without constraints"

Full-Text Indexes

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