XSyntax
------

SUBSTRING_INDEX(str,delim,count)

Description
-----------

Returns the substring from string str before count occurrences of the
delimiter delim. If count is positive, everything to the left of the final
delimiter (counting from the left) is returned. If count is negative,
everything to the right of the final delimiter (counting from the right) is
returned. SUBSTRING_INDEX() performs a case-sensitive match when searching for
delim.

If any argument is NULL, returns NULL.

For example

SUBSTRING_INDEX('www.mariadb.org', '.', 2)

means "Return all of the characters up to the 2nd occurrence of ."

Examples
--------

SELECT SUBSTRING_INDEX('www.mariadb.org', '.', 2);
+--------------------------------------------+
| SUBSTRING_INDEX('www.mariadb.org', '.', 2) |
+--------------------------------------------+
| www.mariadb                                |
+--------------------------------------------+

SELECT SUBSTRING_INDEX('www.mariadb.org', '.', -2);
+---------------------------------------------+
| SUBSTRING_INDEX('www.mariadb.org', '.', -2) |
+---------------------------------------------+
| mariadb.org                                 |
+---------------------------------------------+

URL: https://mariadb.com/kb/en/substring_index/https://mariadb.com/kb/en/substring_index/