Learn SQL basics in just 15 minutes with this tutorial focused on using SQL with MySQL. Topics covered include: - What SQL is ...

📘 SQL Notes – Lesson 4: The SELECT Statement Now that we understood tables, rows, and columns, it’s time to retrieve data using SQL. The SELECT statement is used to retrieve data from a database ...

Learn how to master the SELECT statement to form truly useful data queries. This article explains functions, clauses, and keywords that will make your life a lot easier. Due to popular demand, we’re ...

SUM(salary) OVER(PARTITION BY gender ORDER BY dem.employee_id) AS Rolling_Total # basically the salary is added to the rolling total before and it was partitioned by gender. ROW_NUMBER() ...