吴裕雄--天生自然 PHP开发学习：MySQL子句

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CREATE TABLE `websites` ( `id` int(11) NOT NULL AUTO_INCREMENT, `name` char(20) NOT NULL DEFAULT '' COMMENT '站点名称', `url` varchar(255) NOT NULL DEFAULT '', `alexa` int(11) NOT NULL DEFAULT '0' COMMENT 'Alexa 排名', `country` char(10) NOT NULL DEFAULT '…