How MySQL query is executed?

How is SQL query executed?

SQL Query mainly works in three phases . 1) Row filtering - Phase 1: Row filtering - phase 1 are done by FROM, WHERE , GROUP BY , HAVING clause. 2) Column filtering: Columns are filtered by SELECT clause. 3) Row filtering - Phase 2: Row filtering - phase 2 are done by DISTINCT , ORDER BY , LIMIT clause.

How queries are executed?

In the relational engine, a query is parsed and then processed by the query optimizer, which generates an execution plan. When any query reaches SQL Server, the first place it goes to is the relational engine. Here, the query compilation process happens in three phases; Parsing, Binding and Optimization.

Where are MySQL queries executed?

Execute MySQL queries with the SQL tab You can execute a MySQL query towards a given database by opening the database with phpMyAdmin and then clicking on the SQL tab. A new page will load, where you can provide the desired query. When ready click on Go to perform the execution.

How does MySQL query work internally?

MySQL parses queries to create an internal structure (the parse tree), and then applies a variety of optimizations. These can include rewriting the query, determining the order in which it will read tables, choosing which indexes to use, and so on.