(SELECT SUM(quantity) FROM ordered_items) AS Sum_of_total, (quantity/(SELECT SUM(quantity) FROM ordered_items)*100) AS Percentage_of_all_orders # Given the customer_orders table, Use a subquery to ...

In MySQL it's about 4 seconds vs. about 1.5 minutes. I believe MySQL is creating a temporary table with the entire contents of the subquery where as SQL Server's optimizer is doing something smarter.

Create the tables with referential integrity.Solve following queries using joins and subqueries. 1. Write a query to find the names (first_name, last_name), the salary of the employees who earn more ...