regexp_countCount the number of non-overlapping occurrences of a regular expression pattern in a string.
Example: regexp_count('abacad', 'a|b')
Output: 4
regexp_instrReturns the starting position of the first match of a regular expression pattern in a string.
Example: regexp_instr('abcdef', 'cd')
Output: 3
regexp_likeReturns true if the string matches the regular expression pattern.
Example: regexp_like('cat dog house', 'dog')
Output: true
regexp_replaceReplace the first regular expression match in a string.
Example: regexp_replace('alphabet', '[ae]', 'DOG')
Output: DOGlphabet