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This article shows you how to improve the speed of MySQL query, the content is concise and easy to understand, it will definitely brighten your eyes. I hope you can get something through the detailed introduction of this article.

What are the strategies for improving the speed of MySQL query

1. The table design must be optimized with the least redundant data and less join queries. If extremely complex joins and subqueries are used in practical applications, the design of the data table will have to be reconsidered.

two。 Try to use char instead of varchar, because fixed-length string is faster to use. Nowadays, with the increasing capacity of hard disk, it is worth sacrificing storage space in exchange for faster query speed.

3. Improve query speed by simplifying permissions. If a query has to perform a lot of permission verification before, the query speed will slow down, you might as well try to log in with root in mysql and use your new access control user login speed, you can see, root login, enter at once, and ordinary users login, always delay.

What are the strategies for improving the speed of MySQL query

4. Optimization of the table. If a table has been used for some time, the data will become fragmented as update and delete operations occur, which will also increase the time spent on physical searches in the table. What you need to know is that in the underlying design of mysql, databases are mapped to directories with some kind of file structure, while tables are mapped to files. So disk fragmentation is very likely to occur. Fortunately, in mysql, we can fix it with the following statement:

Optimizetabletablename

Or

Myisamchk-rtablename

5. With indexes, you can use indexes where you need to improve query speed, simplify indexes, and do not create indexes that are not used by queries. You can decide after running the explain command to analyze it.

6. Use the default value, use the default value of the column wherever possible, and insert data only if it is different from the default value. This reduces the time it takes to execute the insert statement.

The above content is how to improve the speed of MySQL query, have you learned the knowledge or skills? If you want to learn more skills or enrich your knowledge reserve, you are welcome to follow the industry information channel.

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