The ultimate guide to SQL interviews. Practice with real-world interview questions developed by FAANG engineers. Prep faster with CRUD queries, SQL functions, and challenging joins/subqueries. Get interview-ready in hours.

This course will help you prepare for your next SQL coding interview. Various problem statements have been provided to evaluate your knowledge and learn to write perfect queries quickly.

The course starts with interview questions on basic CRUD queries. Afterward, interview questions involving different SQL functions, including aggregate and date and time functions, are posed. Then, questions related to data grouping and sorting are presented. Toward the end of the course, more challenging questions related to joins and subqueries are provided.

After completing this course, you will approach your SQL interview with boosted confidence and the ability to address the interview questions with clarity and precision.

SQL Interview Preparation

StudentGrades

align-center

Learn how to use the SUM function to aggregate records in a table using SQL query.

RecordID	StudentID	StudentName	Subject	Marks
1	st-101	Alexa	Mathematics	90.00
2	st-101	Alexa	Science	NULL
3	st-102	Diana	Mathematics	80.00
4	st-102	Diana	Science	88.00
5	st-103	Carl	Mathematics	NULL
6	st-103	Carl	Science	92.00
7	st-104	Sara	Mathematics	75.00
8	st-104	Sara	Science	85.00
9	st-105	Karen	Mathematics	85.00
10	st-105	Karen	Science	90.00

Get Started

CRUD Operations

Aggregate Functions

Date and Time Functions

Filtering

Grouping

Sorting

Constraints

Working with JOINs

Subquery

Final Remarks

Question: Aggregate Records Using SUM

Question

StudentGrades