How to resolve ineffective index queries in MySQL?

When a MySQL query index fails to work effectively, you can try the following methods to resolve the issue:

1. Reanalyze Table: Use the “ANALYZE TABLE table_name” command to reanalyze a table and have MySQL reassess the usage of indexes.
2. Optimize your queries by checking if they can utilize indexes. You can use the EXPLAIN command in MySQL to view the execution plan of a query and then optimize it to ensure that indexes are being used.
3. Repairing indexes: You can repair the table’s indexes by using REPAIR TABLE table_name to fix any issues with index ineffectiveness.
4. Create new indexes: If the query cannot utilize existing indexes, consider adding new indexes to optimize query performance.
5. Redefine table structure: If the above methods are unable to solve the issue of index failure, it may be necessary to redesign the table structure, considering the use of appropriate indexes and optimizing query statements.

It is important to note that resolving index inefficiency issues requires a case-by-case analysis, and appropriate methods should be chosen based on the specific situation.