sql99标准，供需要者参考 the International Organization for Standardization-ISO (the International Organization for Standardization) and IEC (the International Electrotechnical Commission) form the specialized system for worldwide standardization. National b

全国省市二级表，包括港，澳，台，方便使用。二级表，省市之间有指向本表的外键项链，三张表分别是utf-8,iso,gbk编码方式的，方便不同的人使用-National and provincial secondary tables, including Hong Kong, Macao, Taiwan, and easy to use. Between two tables, provincial and municipal point to this table foreign key neck