sql first 2 code example

Example 1: how to fetch first 5 characters in sql

Select SUBSTRING(StudentName,1,5) as studentname from student

Example 2: sql left characters

-- For Oracle only

-- syntax 
SUBSTR(<main-string>,1,<number-of-characters>)

-- example 
SUBSTR('Useless stuff',1,10) -- OUTPUT: Useless st

-- practical example
SELECT SUBSTR('Useless stuff',1,10)
FROM DUAL;