摘要：
If you are a web-designer or developer, without doubt you need to know how your code (html pages with styles) is represented on different browsers. And to find which browsers support which HTML5/CSS3/SVG/lastest-and-greatest features, here are a few resources that you can find helpful Each resource 阅读全文
摘要：
首先想到的是：select distinct 但是，其只能指定一个 “重复列”，如果两列呢？ 嘿嘿 ...group by column1, column2 阅读全文
