| Method | Definition |
| regexp_count | Returns the number times a regular expression matches a string. |
| regexp_ilike | Returns the number times a regular expression matches a string. |
| regexp_instr | Returns the starting or ending position in a string where a regular expression matches. |
| regexp_like | Returns true if the string matches the regular expression. |
| regexp_replace | Replace all occurrences of a substring that match a regular expression with another substring. |
| regexp_substr | Returns the substring that matches a regular expression within a string. |
