Index Optimization in SQL

 Index Optimization in SQL

Index optimization is the process of improving the performance of database queries by optimizing the indexes. Index optimization can involve creating or removing indexes, adjusting the index settings, or using different index types. Here's an example:

sql

ALTER TABLE employees ADD INDEX idx_name_department (name, department);

In this example, we're adding a composite index on the "name" and "department" columns of the "employees" table. This index will improve the performance of queries that filter or join on both columns.