Q1easy
What is a Scalar Subquery?
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19 Questions Total
Advanced SQL MCQs
Topic-wise practice questions for Database Management Systems. Test your knowledge, check solutions on demand, and pace your preparation.
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Practice in Timed ModeQ2hard
What is a Non-Equijoin?
Q3medium
An e-commerce company wants to keep an audit trail. Every time a price is updated in the Products table, the old price and the time of change must be saved into a Price_History table automatically. Which SQL object is designed for this?
Q4easy
What is the purpose of the WITH clause in the following SQL snippet?
Q5medium
You have an Employees table with columns emp_id, name, and manager_id. Which SQL technique is required to generate a list of all employees alongside the name of their direct manager in a single result set?
Q6easy
Analyze the following tables and the query below. What will be the result of the query?
Q7medium
A bank wants a list of customers who have a "Savings Account" but do not have a "Credit Card". Both accounts are stored in the Accounts(cust_id, type) table. Which set operator is most appropriate?
Q8medium
Which of the following is the most standard SQL approach to find the second highest salary in an Employees table without using window functions?
Q9easy
What defines a Correlated Subquery in SQL?
Q10hard
Trace the logic of this three-table join. Which customers will appear in the output?