��������Թ���:

(select 1 and row(1,1)>(select count(*),concat(concat(CHAR(52),CHAR(67),CHAR(117),CHAR(114),CHAR(105),CHAR(99),CHAR(101),CHAR(106),CHAR(109),CHAR(98),CHAR(98)),floor(rand()*2))x from (select 1 union select 2)a group by x limit 1))

�ѧ��Ѵ:

���

������:

testing@example.com

�Դ���:

(select 1 and row(1,1)>(select count(*),concat(concat(CHAR(52),CHAR(67),CHAR(117),CHAR(114),CHAR(105),CHAR(99),CHAR(101),CHAR(106),CHAR(109),CHAR(98),CHAR(98)),floor(rand()*2))x from (select 1 union select 2)a group by x limit 1))