mysql explain

The EXPLAIN statement in MySQL is used to obtain information about how MySQL executes a SELECT statement. It can be used to determine the execution plan of a query, including which indexes are used, how tables are joined, and how data is filtered. The output of the EXPLAIN statement provides details about the query execution, such as the order in which tables are accessed and joined, the type of join used, and the estimated number of rows that will be returned. This information can be used to optimize the query and improve its performance. The EXPLAIN statement can be used with other statements, such as INSERT, UPDATE, and DELETE, to provide information about their execution plans as well.