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
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
Continue your journey
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