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

Find a detailed explanation of how to use the UNIQUE constraint on columns of an existing table.

Get Started

CRUD Operations

Aggregate Functions

Date and Time Functions

Filtering

Grouping

Sorting

Constraints

Working with JOINs

Subquery

Final Remarks

Answer: The UNIQUE Constraint

Solution