Can MySQL use multiple indexes for a single query?

Question

Imagine a table with multiple columns, say, id, a, b, c, d, e. I usually select by id, however, there are multiple queries in the client app that u

Answer 1

Classically, MySQL can use one index per table reference in a given query. However, in more recent versions of MySQL, an operation called an index merge can take place and allow MySQL to use more than one index per table.

http://openquery.com/blog/mysql-50-index-merge-using-multiple-indexes