Order of SQL Query Execution

Ever wondered how an SQL query works behind the scenes? Let's break down the steps in simple terms so you can easily grasp the order of execution. A flow of SQL query execution is shown in the following figure.

1. FROM Clause

Our journey commences with the FROM clause. It orchestrates the tables, assembling the ensemble for our performance.

In our case:

FROM employees;

The 'employees' table takes center stage.

2. WHERE Clause

Now, we sculpt the narrative with the WHERE clause. It sets the scene by specifying conditions.

WHERE hire_date > '2022-01-01';