Write a query get the first 3 characters of first name from students table

Introduction

Write a query get the first 3 characters of first name from students table. I have used phpMyAdmin for the following example.

– students

StudentId	FirstName	LastName	Admission_fee	Admission_date	Branch
1	John	Smith	1000	2018-06-10	Computer Engineering
2	David	Jones	1200	2018-06-20	Civil Engineering
3	Michael	Johnson	900	2018-08-15	Chemical Engineering
4	Chris	Lee	1500	2018-07-10	Electrical Engineering
5	Mike	Brown	1600	2018-09-10	Mechanical Engineering
6	Lisa	Smith	1800	2018-07-10	Computer Engineering
7	Mary	Smith	1600	2018-06-11	Computer Engineering

SELECT SUBSTRING( firstname, 1, 3 ) 
FROM students

Result