The SQL online test assesses candidates' knowledge of SQL queries and relational database concepts, such as indexes and constraints.

It's an ideal test for pre-employment screening. A good database admin, back-end developer, or data analyst all need a solid understanding of SQL to interface and access an SQL database efficiently.

This online test requires candidates to write SQL queries that extract, combine, and manipulate data.

Recommended Job Roles
Data Analyst
Database Administrator
SQL Developer
Sample Candidate Report

Sample Free Questions

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

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.

Pets

5min
  -  
Easy  
  -  
CODE

SQL Joins Public

Information about pets is kept in two separate tables:

TABLE dogs
  id INTEGER NOT NULL PRIMARY KEY,
  name VARCHAR(50) NOT NULL

TABLE cats
  id INTEGER NOT NULL PRIMARY KEY,
  name VARCHAR(50) NOT NULL

Write a query that select all distinct pet names.

See the example case for more details.

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Premium Questions

The premium question library contains our unique, hand-crafted questions. We offer a refund if you find any of them answered online.

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, 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
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