UNHEX
Sintassi
UNHEX(str)
Spiegazione
Effettua l'operazione inversa rispetto a HEX(str). Interpreta ogni coppia di cifre esadecimali presenti nell'argomento come numero e converte il tutto nel carattere rappresentato da quel numero. I caratteri risultanti sono restituiti come stringa binaria.
Esempi
MariaDB [(none)]> SELECT HEX('MariaDB');
+----------------+
| HEX('MariaDB') |
+----------------+
| 4D617269614442 |
+----------------+
1 row in set (0.00 sec)
MariaDB [(none)]> SELECT UNHEX('4D617269614442');
+-------------------------+
| UNHEX('4D617269614442') |
+-------------------------+
| MariaDB |
+-------------------------+
1 row in set (0.00 sec)
MariaDB [(none)]> SELECT 0x4D617269614442;
+------------------+
| 0x4D617269614442 |
+------------------+
| MariaDB |
+------------------+
1 row in set (0.00 sec)
MariaDB [(none)]> SELECT UNHEX(HEX('string'));
+----------------------+
| UNHEX(HEX('string')) |
+----------------------+
| string |
+----------------------+
1 row in set (0.00 sec)
MariaDB [(none)]> SELECT HEX(UNHEX('1267'));
+--------------------+
| HEX(UNHEX('1267')) |
+--------------------+
| 1267 |
+--------------------+
1 row in set (0.00 sec)
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