SQL - 250 interview questions

The course will provide you with an opportunity to review the material and fill in any potential gaps. The questions have been prepared to cover the widest possible range of topics on the fundamentals of the SQL language. Some example topics from the course include:

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  Data types in SQL

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  SELECT queries

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  Data filtering

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  Grouping and aggregation

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  Built-in SQL functions

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  Primary and foreign keys

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  Joins

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  Table modification - ALTER TABLE Queries

Simple and convenient

The course contains both single-choice and multiple-choice questions. This simple format allows you to easily use the course in a way that is the most convenient for you. Just a few minutes will be enough to review a selected part of the material.

Go through the questions, check if you already know everything, and fill in any potential gaps. Celebrate your success in landing your dream job as a SQL Developer.

Why you should keep working on your SQL skills

SQL is the most widely used language for working with relational databases. Its understanding is key to effective and productive data manipulation. SQL is used practically everywhere: in business analysis, statistics, education, administration, and numerous other fields.