what is mysql index

The index in MySQL means index. It is a data structure used to speed up the query of database tables. The index can be compared to the catalog of a book. It stores the values of specific columns in the table and the corresponding row positions, making the database more efficient. Locate and access data quickly. The function of the index is to improve query efficiency. Without an index, the database needs to scan the entire table row by row to find matching data. This method will be very time-consuming in large tables. With an index, the database can The required data rows are quickly located in the order, which greatly improves the query speed.

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mysql index

what is mysql index

Oct 08, 2023 am 11:47 AM

mysql index

What is the usage of mysql index keyword

In mysql, the index keyword can be used to create an index with the syntax "CREATE INDEX index name ON table name (column name)"; it can be used to view the index with the syntax "SHOW INDEX FROM table name"; it can also be used to modify the index with the syntax "DROP INDEX index name ON table name".

Mar 01, 2022 pm 03:40 PM

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mysql index what does it mean

In MySQL, index refers to "index", which is a special database structure composed of one or more columns in the data table. It can be used to quickly query records with a specific value in the data table. Through the index, when querying data, you do not need to read all the information of the record, but only query the index column; otherwise, the database system will read all the information of each record for matching. Therefore, using indexes can greatly improve the query speed of the database and effectively improve the performance of the database system.

Apr 13, 2023 pm 04:13 PM

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