To search a string for a substring using characters, use INSTR.
A nonzero INTEGER when the search is successful or
0 (zero) when it is not.
INSTRB (string , substring [, position [, occurrence]])
The text expression to search.
The string to search for.
A nonzero INTEGER indicating the byte of string where the function begins the search. When position is negative, then INSTRB counts and searches backward from the end of string. The default value of position is
1, which means that the function begins searching at the first byte of string.
An INTEGER indicating which occurrence of string the function should search for. The value of occurrence must be positive. The default values of occurrence is
1, meaning the function searches for the first occurrence of substring.
This example assumes a double-byte database character set.
SHOW INSTRB('Corporate Floor','or',5,2) 27