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This article mainly introduces what the mysql index is, it has certain reference value, friends who need it can refer to it. I hope you will learn a lot after reading this article. Next, let the editor take you to learn about it.

What is the mysql index?

An index is a data structure that enables MySQL to read data quickly. It has two main structures, namely, B+Tree index and Hash index. The index we usually talk about, if not specifically specified, generally refers to the index organized by the B-tree structure (B+Tree index).

The role of the index:

1. You can use it to speed up the retrieval of data.

two。 Ensure the uniqueness of the data record.

3. The connection between the meter and the meter can be accelerated.

4. Indexes can be used to reduce the time for sorting and grouping.

5. The use of index can speed up the judgment of conditions.

MySQL is a relational database management system developed by the Swedish company MySQL AB and belongs to the products of Oracle. MySQL is one of the most popular relational database management systems. In the aspect of WEB application, MySQL is one of the best RDBMS (Relational Database Management System) application software.

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