Can mysql query the index in the table?

mysql can query the index in the table. The implementation methods are: 1. DESC instruction, which displays the structural information of the table, including indexes. The command example is "DESC table name;"; 2. SHOW INDEX instruction, which displays the table's structure information. Index information, command example "SHOW INDEX FROM table name"; 3. INFORMATION_SCHEMA database, query the database to obtain information about table indexes.

Operating system for this tutorial: Windows 10 system, MySQL 8 version, Dell G3 computer.

MySQL can query the index in the table. This can be achieved in the following ways:

1. DESC command:

You can use the DESC command to display the structure information of the table, including indexes.

For example, to query the indexes of a table named table_name , you can run the following command:

DESC table_name;

The output of the command will include a "Key" column that displays the indexes in the table.

2. SHOW INDEX command:

Use the SHOW INDEX command to display the index information of the table.

For example, to query the index of a table named table_name , you can run the following command:

SHOW INDEX FROM table_name;

This will display detailed information about the table's index, including index name, column name , uniqueness, etc.

3. INFORMATION_SCHEMA database:

MySQL provides the INFORMATION_SCHEMA database, which contains information about various metadata such as databases, tables, columns, etc. You can query the INFORMATION_SCHEMA database to obtain information about table indexes.

For example, to query the indexes for a table named table_name , you can run the following query:

SELECT * FROM INFORMATION_SCHEMA.STATISTICS WHERE TABLE_NAME = 'table_name';

This will return the index information related to the specified table.

The above are several common methods of querying indexes in tables. You can choose a suitable method to view the index information of the MySQL table according to your specific needs.

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