How to View and Manage MySQL Indexes?

How to Identify and Manage Indexes in MySQL

In MySQL, indexes play a crucial role in optimizing database performance by providing a fast and efficient way to locate specific records. Understanding how to view and manage indexes is essential for effective database management.

Viewing Indexes for a Specific Table

To display the indexes associated with a particular table, use the following query:

SHOW INDEX FROM your_table;

This command will provide information about the indexes, including their names, columns, and whether they are unique or non-unique.

Viewing Indexes for All Tables in a Schema

To obtain a list of indexes for all tables within a specific schema, you can query the STATISTICS table in the INFORMATION_SCHEMA database:

SELECT DISTINCT
    TABLE_NAME,
    INDEX_NAME
FROM INFORMATION_SCHEMA.STATISTICS
WHERE TABLE_SCHEMA = 'your_schema';

Removing the WHERE clause will show you all indexes across all schemas.

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