Azure Database for MySQL is a PaaS (Platform as a Service) solution that Microsoft offers on Azure. Using Azure managed services for MySQL (and PostgreSQL), enables one to easily build an intelligent and secure application.
Though Microsoft has done a lot of work to optimize database performance, sometimes a simple query can easily become a bottle neck impacting overall database performance. Luckily, MySQL integrates a handy tool – the EXPLAIN statement – that can profile client queries and thus help you identify the root cause of a slow query. You can use an EXPLAIN statement to get information about how SQL statements are executed. With this information, you can profile which queries are running slow and why.
Read about it in the Azure blog.