What is the creation scenario of the mysql index?

This article mainly introduces "what is the creation scene of the mysql index". In the daily operation, I believe many people have doubts about the creation scene of the mysql index. The editor consulted all kinds of materials and sorted out a simple and easy-to-use operation method. I hope it will be helpful to answer the doubt of "what is the creation scene of the mysql index?" Next, please follow the editor to study!

1. It appears frequently in where condition field, order sorting field and group by grouping field.

2. Select frequently queries the columns, considering whether it is necessary to create a federated index.

3. For multi-table join associated queries, indexes should be created for fields on both sides of the on field.

Example

CREATE INDEX index_name ON table (column (length)) ALTER TABLE table_name ADD INDEX index_name ON (column (length)) can also create indexes CREATE TABLE `table` (`id` int (11) NOT NULL AUTO_INCREMENT, `title` char (255) CHARACTER SET utf8 COLLATE utf8_general_ci NOT NULL, `content` text CHARACTER SET utf8 COLLATE utf8_general_ci NULL, `time` int (10) NULL DEFAULT NULL, PRIMARY KEY (`id`), INDEX index_name (title (length)) when creating tables. The study on "what is the scenario for creating an mysql index" is over. I hope to be able to solve your doubts. The collocation of theory and practice can better help you learn, go and try it! If you want to continue to learn more related knowledge, please continue to follow the website, the editor will continue to work hard to bring you more practical articles!