sql substring left code example

Example 1: sql server substring

SELECT SUBSTRING('SQL Tutorial', 1, 3) AS ExtractString;

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;