1、PASSWORD()

2、ENCODE(,)   DECODE(,)

3、MD5()

4、SHA5()

5、AES_ENCRYPT AES_DECRYPT

加密 select   aes_encrypt(name, 'password ');

解密 select   aes_decrypt(aes_encrypt(name, 'password '), 'password ');

可用hex或base64转码(base64在mysql5.6及以上支持)

select   hex(aes_encrypt('5656', 'zh'));

select   aes_decrypt(unhex(hex(aes_encrypt('5656', 'zh'))), 'zh');

select   to_base64(aes_encrypt('5656', 'zh'));

select   aes_decrypt(from_base64(to_base64(aes_encrypt('5656', 'zh'))), 'zh');