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How MySQL SUBSTRING_INDEX() function returns the substring if we provide the negative value of the argument ‘count’?
MySQL SUBSTRING_INDEX() function can accept the negative value of argument ‘count’ and in this case, it returns the substring from the right of the final delimiter.
Example
mysql> Select SUBSTRING_INDEX('www.google.com','.',-2);
+------------------------------------------+
| SUBSTRING_INDEX('www.google.com','.',-2) |
+------------------------------------------+
| google.com |
+------------------------------------------+
1 row in set (0.00 sec)
mysql> Select SUBSTRING_INDEX('www.google.com','.',-1);
+------------------------------------------+
| SUBSTRING_INDEX('www.google.com','.',-1) |
+------------------------------------------+
| com |
+------------------------------------------+
1 row in set (0.00 sec)
Updated on: 10-Feb-2020
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