srch-str -> String to be searched
Str-srched -> String in which srch-str is searched for
Start pos -> start of search. This is optional and by default it is 0 i.e beginning of str-srched
WORDPOS('dog', 'barking dogs seldom bite')
WORDPOS('tide', 'time waits for none')
WORDPOS('be', 'To be or not to be',3)
--returns 6 since the search starts at 3rd word 'or'