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MySQL index details, MySQL index detailsI. Introduction to index basics 1.1 In MySQL, indexes are also called keys. They are a data structure that the storage engine uses to quickly find records. Indexes are critical to good performance. Especially

ReprintedBytes IndexYou can use indexes to quickly access specific information in database tables. An index is a structure that sorts the values of one or more columns in a database table (for example, the last name (lname) column of the employee

This article is transferred from: Http://www.cnblogs.com/abcdwxc/archive/2007/12/11/990274.html ----------------------- Creates an index for a given table or view.Only the owner of a table or view can create an index for the table. The owner of a

Why create an index? This is because creating an index can greatly improve the system performance.First, you can create a unique index to ensure the uniqueness of each row of data in the database table.Second, it can greatly speed up data retrieval,

Creating an index is the establishment of an index on one or more columns of a table to increase the speed of access to the table. There are 3 ways to create an index, the 3 ways to create an index when creating a table, to create an index on a

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Index advantages and disadvantages: 12th pages. Why should I create an index? This is because creating an index can greatly improve the system performance. First, you can create a unique index to ensure the advantages and disadvantages of indexes in

Advantages and disadvantages of indexes Why do you create an index? This is because creating an index can greatly improve the performance of the system. First, by creating a unique index, you can guarantee the uniqueness of each row of data in a

TableOriginal: http://yingminxing.com/mysql%E6%8A%80%E6%9C%AF%E5%86%85%E5%B9%95innodb%E5%AD%98%E5%82%A8%E5%BC%95%E6%93%8E% ef%bc%8d%e8%a1%a8%e7%b4%a2%e5%bc%95%e7%ae%97%e6%b3%95%e5%92%8c%e9%94%81/4.1. InnoDB Storage Engine Table typeInnoDB tables are

Advantages and disadvantages of Indexes Why create an index? This is because creating an index can greatly improve the system performance. First, you can create a unique index to ensure the uniqueness of each row of data in the database table.