Question

18. We can do nothing about it (Use'unable to and rewrite)39. They are able to perform any action
(Remove 'able to')​

Answer 1

Answer:

Query optimization, index optimization, and schema optimization go hand in hand. As you gain experience writing queries in MySQL, you will come to understand how to design schemas to support efficient queries. Similarly, what you learn about optimal schema design will influence the kinds of queries you write.