MySQL and SQL Online Test

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The MySQL and SQL online test assesses candidates' knowledge of SQL queries, relational database concepts, and specific MySQL features.

It's an ideal test for pre-employment screening. A good database admin or back-end developer working exclusively on a MySQL server database needs to be able to use features specific to MySQL to interface efficiently with the database.

This online test requires candidates to answer multiple-choice questions about MySQL and to write SQL queries that extract, combine, or manipulate data.

Recommended Job Roles

Data Analyst

Database Administrator

MySQL Database Administrator

MySQL Developer

SQL Developer

Sample Candidate Report

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Sample Free Questions

Paginate Users

3min

Easy

MCA

MySQL Pagination Public New

Consider the following table:

CREATE TABLE users (
  id BIGINT NOT NULL AUTO_INCREMENT PRIMARY KEY,
  username VARCHAR(50) NOT NULL
);

The following query is used to paginate the table:

SELECT * FROM users ORDER BY username LIMIT 5 OFFSET 15;

Select all the true statements about this method of pagination.

(Select all acceptable answers.)

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Students

3min

Easy

CODE

SQL Aggregation Public

Given the following data definition, write a query that returns the number of students whose first name is John. String comparisons should be case sensitive.

TABLE students
   id INTEGER PRIMARY KEY,
   firstName VARCHAR(30) NOT NULL,
   lastName VARCHAR(30) NOT NULL

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Enrollment

5min

Easy

CODE

SQL Conditions Update Public

A table containing the students enrolled in a yearly course has incorrect data in records with ids between 20 and 100 (inclusive).

TABLE enrollments
  id INTEGER NOT NULL PRIMARY KEY
  year INTEGER NOT NULL
  studentId INTEGER NOT NULL

Write a query that updates the field 'year' of every faulty record to 2015.

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Premium Questions

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Questions

Movies, Index Performance, Poll, Rectangles, Retirees, Authors, Countries, Employee Manager, Merge Stock Index, Cheapest Product, Movies Live, ATM Locations, Department Report, Developers, Delete Orders, Restaurant Menu, Roads, Sales, Student Activities, Transactions, Projects, Youngest Child, Tasks, Ingredients, Autocomplete, Dot Items, JSON Stock, Cargo Concat, Employee Sales, Employee Tree, Bank Branches, Hospital Patients, Menu Items, Ban Users, SMS Messages

Skills

SQL Aggregation Subqueries Indexes Conditions Insertion Language Joins Union Constraints Database Schema Bug fixing Delete Update Views Performance tuning MySQL String Functions JSON Window functions Common Table Expression

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