AI Interview

SQL Interview - Beginner Level

Perfect for developers with 0-2 years of SQL experience. Master SELECT queries, JOINs, WHERE clauses, and fundamental SQL operations.

15-20 minutes

0-2 years of SQL experience

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Who is this for?

  • Developers new to SQL

  • Students learning databases

  • Backend developers learning data access

  • Anyone preparing for junior developer roles

What you'll practice

  • Writing SELECT queries

  • Filtering data with WHERE

  • Using INNER JOIN

  • Aggregating data (COUNT, SUM, AVG)

  • Grouping results

  • Basic data manipulation

Topics covered

Query Basics

  • SELECT statement

  • WHERE clause

  • ORDER BY

  • LIMIT

JOINs

  • INNER JOIN

  • LEFT JOIN basics

  • Foreign keys

  • Multiple table queries

Aggregations

  • COUNT, SUM, AVG

  • GROUP BY

  • MIN, MAX

  • HAVING clause basics

Data Manipulation

  • INSERT basics

  • UPDATE basics

  • DELETE basics

  • NULL handling

Example questions

Q:

How do you write a SELECT query to filter data?

Q:

What is the difference between WHERE and HAVING?

Q:

How does INNER JOIN work?

Q:

How do you find the total count of records?

Q:

What is GROUP BY and when do you use it?

Q:

How do you handle NULL values in SQL?

Preparation tips

  • Practice SELECT queries

  • Learn INNER JOIN thoroughly

  • Master WHERE clause conditions

  • Work with aggregate functions

  • Practice GROUP BY queries

  • Understand primary and foreign keys

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