nowadays,I sometimes couldn't read a less than 10,000-word article about software,ajax,sql,or jsp.But tonight I find in surprise I read much about index of SQL,I think I only can read something that I know sth about it, not nothing,since I read something about B-tree and heap noon.
But this is a problem for me.I am a little self-will.
Next article I will write sth about the understanding for me to the index of SQL,there will be some subject as why index has two sides and when shall we use index and so on.Actually,I have lots of problems to wait you,the big niu men to answer.
