How UNHEX() Works in MariaDB

In MariaDB, UNHEX() is a built-in string function that performs the inverse operation of the HEX() function.

Whereas, the HEX() function returns a hexadecimal representation of a given string, the UNHEX() function returns the string representation of a given hexadecimal value.

Specifically, UNHEX() interprets each pair of hexadecimal digits in its argument as a number, and then converts it to the character represented by the number.

The result is returned as a binary string.

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