SQL LEFT - RIGHT


Example

Syntax is:
LEFT ( string-expression , integer )
RIGHT ( string-expression , integer )

SELECT LEFT('Hello',2)  --return He  
SELECT RIGHT('Hello',2) --return lo

Oracle SQL doesn't have LEFT and RIGHT functions. They can be emulated with SUBSTR and LENGTH.
SUBSTR ( string-expression, 1, integer )
SUBSTR ( string-expression, length(string-expression)-integer+1, integer)

SELECT SUBSTR('Hello',1,2)  --return He  
SELECT SUBSTR('Hello',LENGTH('Hello')-2+1,2) --return lo