In 2026, entry-level and transition roles often expect more than passive course completion. Employers want to see that you can write queries that answer business questions, work with browser logic, ...

COUNT(DISTINCT transaction_id) AS number_of_sales, COUNT(DISTINCT product_id) AS number_of_products, COUNT(DISTINCT store_id) AS number_of_stores WHEN date_format(transaction_time, 'HH:mm:ss') BETWEEN ...