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This article is to share with you about why mysql is the most left matching, the editor thinks it is very practical, so I share it with you to learn. I hope you can get something after reading this article.

Why is mysql the leftmost match?

1. Because when Mysql creates a federated index, it sorts the leftmost index field first.

2.mysql sorts the second index field on the basis of the first sort. In fact, it is like implementing a sort rule like Order by field 1 and Order by field 2.

The first field of 3.MySQL is absolutely ordered, while the second field is unordered.

4. Under normal circumstances, it is not necessary to use the second field to determine the condition directly in MySQL.

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. MySQL is a relational database management system in which relational databases store data in different tables instead of all data in one large warehouse, which increases speed and flexibility.

This is why mysql is the leftmost match. The editor believes that there are some knowledge points that we may see or use in our daily work. I hope you can learn more from this article. For more details, please follow the industry information channel.

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