SELECT LEFT('SQL Tutorial', 3) AS ExtractString; code example

Example 1: 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;

Example 2: grab part of a string sql

SELECT SUBSTRING('SQLTutorial.org');