The Complete SQL Quiz: Queries, Functions, and More!

Welcome to the SQL Quiz. If you’re diving into databases and SQL, there’s no better way to test and improve your skills than by taking a SQL quiz. Whether you’re just starting with SQL or looking to challenge yourself with more advanced queries, this quiz is designed to help you. We’ve included a variety of questions from basic MCQ for database topics to more challenging scenarios that mimic real-world SQL problems. This isn’t just any quiz—it’s tailored for learners of all levels, offering everything from fundamental queries to advanced SQL online quiz tests.

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Why Take This SQL Quiz?

SQL is one of the most essential skills for developers, data analysts, and database administrators. It powers everything from simple data retrievals to complex queries in enterprise-level applications. The ability to query a database efficiently and accurately is invaluable in many industries, from tech startups to global corporations.

Taking an SQL quiz can:

Help you review and reinforce the concepts you’ve learned.
Give you hands-on practice with SQL programming.
Help you evaluate your understanding of DBMS and relational databases.

But there’s more—this quiz isn’t just about brushing up on syntax or memorizing commands. It helps you think critically and apply logic to solve real-world problems.

Use Cases of the SQL Quiz

This quiz can be used in several contexts:

Job interviews: SQL is frequently tested in technical interviews. This quiz will prepare you to tackle MCQ for SQL and practical SQL problems you might face.
Academic settings: If you’re studying databases, taking an advanced SQL quiz can deepen your understanding of key concepts and help you succeed in exams.
Skill assessment: Companies often use quizzes like this to assess the skills of candidates or employees, making sure they are proficient in SQL queries, especially for roles in data analytics or backend development.

Who Should Take This Quiz?

Whether you’re a beginner, intermediate, or advanced learner, this quiz has something for everyone:

Beginners: If you’re just starting, this quiz will test your basic SQL knowledge, covering SELECT statements, WHERE clauses, and more.
Intermediate learners: Expect questions on JOINS, subqueries, and SQL programming quiz challenges that focus on real-world use cases.
Advanced users: Dive into complex query optimization, window functions, and deep database management with our advanced SQL quiz sections.

Key Features of the SQL Quiz

Multiple Choice Questions (MCQs): Perfect for those who want to quickly assess their knowledge. Our SQL MCQ test questions cover a range of topics, including query structure, functions, and database design. You can also give our free online HTML Quiz.
Scenario-based questions: Understand how SQL is applied in real-world database systems. You’ll be working with practical use cases that are commonly faced by data professionals.
Instant feedback: As soon as you answer each question, you’ll get immediate feedback, helping you learn from any mistakes and reinforcing your knowledge.

What You Will Learn

By the time you finish this SQL quiz, you’ll have reviewed key concepts like:

Basic SQL syntax and usage
Querying multiple tables with JOINs
Writing SQL MCQ online tests on complex queries
Understanding database design and db quiz questions

How to Prepare

Don’t worry if you feel rusty—take your time, and use this quiz as a tool for growth. The questions are designed to challenge you, but they also provide explanations for the correct answers, so you can learn as you go.

If you’re aiming for roles in tech or data science, make sure to brush up on key topics before diving into the SQL online quiz free section. Here are some preparation tips:

Review basic SQL syntax: Make sure you’re familiar with SELECT, INSERT, UPDATE, DELETE, and basic WHERE clauses.
Practice JOINs: Many quizzes, including ours, often test your ability to work with JOINs—INNER, LEFT, RIGHT, and FULL.
Try hands-on SQL exercises: Don’t just read theory—write actual SQL queries and run them on a database.

This SQL quiz online is not just for testing what you know but also for learning along the way. Whether you’re prepping for a certification, or job interview, or just trying to level up your skills, this quiz will challenge and inspire you. Remember, SQL isn’t just a tool—it’s a language that opens up a world of data possibilities.

Now it’s time to get started with the quiz! Answer the questions below and see where you stand. Good luck

What does SQL stand for?
- Sample Query Language
- Structured Query Language
- Simple Query Language
- Sequential Query Language
Which of the following is a valid SQL command to retrieve data?
- SELECT ALL FROM table_name
- GET ALL FROM table_name
- FETCH * FROM table_name
- SELECT * FROM table_name
Which SQL statement is used to update data in a database?
- MODIFY table_name SET column_name = value
- UPDATE table_name SET column_name = value
- CHANGE table_name SET column_name = value
- ALTER table_name SET column_name = value
Which SQL clause is used to filter records?
- WHEN
- FILTER
- WHERE
- HAVING
Which SQL statement is used to delete a record in a table?
- DROP FROM table_name
- DELETE FROM table_name WHERE condition
- REMOVE FROM table_name
- TRUNCATE table_name
What keyword is used to prevent duplicate records in SQL?
- UNIQUE
- DISTINCT
- DIFFERENT
- NO_DUPLICATES
Which function is used to count the number of rows in a SQL query?
- TOTAL()
- SUM()
- NUMROWS()
- COUNT()
Which SQL statement is used to create a new table?
- NEW TABLE table_name
- MAKE TABLE table_name
- ADD TABLE table_name
- CREATE TABLE table_name
Which of the following is a valid SQL data type?
- VARCHAR
- STRING
- TEXTUAL
- NUMERIC
What is the purpose of the SQL JOIN clause?
- To join rows from two tables
- To combine rows from two or more tables based on a related column
- To filter rows from two or more tables
- To delete rows from two or more tables
Which SQL keyword is used to sort the result set?
- SORT BY
- GROUP BY
- ORDER BY
- SEQUENCE BY
What command is used to remove all records from a table in SQL without removing the table itself?
- DELETE table_name
- TRUNCATE table_name
- DROP table_name
- REMOVE table_name
Which SQL statement is used to add a new column to an existing table?
- MODIFY table_name ADD column_name datatype
- UPDATE table_name ADD column_name datatype
- ALTER TABLE table_name ADD column_name datatype
- CHANGE TABLE table_name ADD column_name datatype
Which SQL keyword is used to create an index on a table?
- INDEX BY
- ADD INDEX
- MAKE INDEX
- CREATE INDEX
What is the default sorting order of the ORDER BY clause in SQL?
- Ascending
- Descending
- Random
- None of the above
Which SQL function is used to get the highest value in a column?
- MAXIMUM()
- MAX()
- TOP()
- HIGH()
Which SQL clause is used to group rows that have the same values?
- GROUP BY ALL
- ORDER BY
- DISTINCT
- GROUP BY
What is the purpose of the SQL HAVING clause?
- To filter groups based on a condition
- To sort the result set
- To filter individual records
- To join tables
What SQL keyword is used to remove a table from a database?
- DELETE TABLE table_name
- TRUNCATE TABLE table_name
- DROP TABLE table_name
- REMOVE TABLE table_name
Which SQL statement is used to create a view?
- VIEW view_name AS SELECT …
- CREATE VIEW view_name AS SELECT …
- NEW VIEW view_name AS SELECT …
- MAKE VIEW view_name AS SELECT …
Which SQL command is used to grant privileges to users?
- ALLOW
- PERMIT
- GRANT
- AUTHORIZED
What is a primary key in SQL?
- A unique identifier for each record in a table
- A column that allows duplicate values
- A column that cannot be null
- A column used for indexing
Which SQL command is used to roll back a transaction?
- COMMIT
- ROLLBACK
- SAVE
- REVERT
What does the SQL LIKE operator do?
- Checks for exact matches
- Searches for a specified pattern in a column
- Compares values between two columns
- Limits the number of results returned
Which function would you use to find the total sum of a numeric column?
- TOTAL()
- ADD()
- SUM()
- COUNT()
What is a foreign key in SQL?
- A unique identifier for a record
- A column that contains null values
- A column that does not allow duplicates
- A field in one table that uniquely identifies a row in another table
Which SQL clause is used to join two tables?
- JOIN
- COMBINE
- LINK
- CONNECT
Which keyword is used to prevent duplicate values in a column?
- DISTINCT
- DIFFERENT
- UNIQUE
- NO_DUPLICATES
Which SQL statement is used to modify existing records in a table?
- UPDATE RECORD
- UPDATE
- MODIFY
- CHANGE
What does the SQL DISTINCT keyword do?
- Sorts the result set
- Filters results based on a condition
- Removes duplicate records from the result set
- Groups similar records together