Exploring Index Information in MySQL
Want to know if your MySQL database or table has an index? The following methods can help you get the information you need easily:
Database level index query:
To view all indexes in the database, you can use the STATISTICS table. This table is located in INFORMATION_SCHEMA and contains information about all table indexes in the database. Use the following query:
SELECT DISTINCT TABLE_SCHEMA, TABLE_NAME, INDEX_NAME FROM INFORMATION_SCHEMA.STATISTICS;
Specific table index query:
To view the indexes in a specific table, use the SHOW INDEX statement. This statement displays all indexes in the table, including index names, columns, and index types. Use the following queries:
SHOW INDEX FROM your_table;
Using these queries, you can easily view index information in a MySQL database or table to better understand your database and optimize query performance.
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