说明： 本文的内容针对MySQL 3.23.7alpla，实际上很多内容是通用的。另外，参考手册的几个附录也是很有价值的，但由于时间有限，未能译出，可参见原文。 ( This article content in view of MySQL 3.23.7alpla, very many
contents is general in fact. Moreover, the reference manual several
appendices also are very valuable, but because the time is limited,
has not been able to translate, may see also the original text. )
