Can you go ahead and write a query on the left side?

Sure! Here’s a simple example of a SELECT query that you might write on the left side of a SQL editor. Suppose you have a table called orders with columns order_id, customer_id, order_date, and total_amount. To retrieve all orders placed in the last 30 days and order them by total amount descending, you could write: SELECT order_id, customer_id, order_date, total_amount FROM orders WHERE order_date >= CURRENT_DATE - INTERVAL '30' DAY ORDER BY total_amount DESC; This query demonstrates a few core concepts: 1. Filtering with a WHERE clause. 2. Date arithmetic using CURRENT_DATE and INTERVAL. 3. Sorting with ORDER BY. If you need to join with another table, say customers, you would add an INNER JOIN clause: SELECT o.order_id, c.customer_name, o.order_date, o.total_amount FROM orders o JOIN customers c ON o.customer_id = c.customer_id WHERE o.order_date >= CURRENT_DATE - INTERVAL '30' DAY ORDER BY o.total_amount DESC; The time complexity of this query is O(n log n) for the sort, assuming the database can use an index on order_date and total_amount. The space complexity is O(k) for the result set, where k is the number of rows that satisfy the filter. This example should give you a solid starting point for writing queries on the left side of your editor.