MySQL Tutorial/Encryption Compression Functions/DES DECRYPT

DES_DECRYPT(crypt_str[,key_str]) (Decrypts a string encrypted with DES_ENCRYPT().)

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mysql> mysql> select DES_DECRYPT(DES_ENCRYPT("credit_card_number")); +------------------------------------------------+ | DES_DECRYPT(DES_ENCRYPT("credit_card_number")) | +------------------------------------------------+ | credit_card_number | +------------------------------------------------+ 1 row in set (0.00 sec) mysql></source>