Hi,
Thank you for your info.
My further question is,
if I have a many-to-many relationship table, how should I build up the candicate index to ensure the uniqueness which contain 2 integer value?? Should I just add 2 integer or STR() them and join it as string?
Thank you
I am not the most powerful man in this world.
I am not the worst man in this world either.
I just as same as all of you.
I still need to learn from my mistakes...
