What will MySQL return if we convert an empty hex value to a number?

We know that an empty hex value is a zero-length binary string, so if you add 0 to it, the result will be 0. In other words, we can say that if we convert an empty hexadecimal value to a number, then it produces 0. The following query will make it understand -

mysql> SELECT X''+ 0;
+--------+
| X''+ 0 |
+--------+
| 0      |
+--------+
1 row in set (0.15 sec)

The above is the detailed content of What will MySQL return if we convert an empty hex value to a number?. For more information, please follow other related articles on the PHP Chinese website!