CODE EXAMPLE FOR SQL

oracle character index

-- EXAMPLE
select 
	'0004V0' as TESTER
	, INSTR('0004V0','V') -- OUTPUT: 5
	, INSTR('0004V0','0') -- OUTPUT: 1
	, INSTR('0004V0','0',4) -- OUTPUT: 6
from DUAL;

-- SYNTAX
INSTR(/*Main string*/, /*substring*/, /*start index*/)