The POSITION function returns the first position (in characters) of a substring in a source string.
Is the substring whose position you want to locate. The string can be as short as a single character, including a single blank.
Is the string in which to find the pattern.
The data type of the returned value is Integer.
POSITION determines the position of the first capital letter I in LAST_NAME.
For STEVENS, the result is 0.
For SMITH, the result is 3.