摘要:
1.||连接符2.集合操作:union与union all区别;intersect返回两个表中共有的行;minus返回的记录是存在于第一个表中但是不存在于第二个表中的记录。in操作:select * from friends where state in ('ca','co','la');3.between:select * from price where wholesale between 0... 阅读全文
posted @ 2008-12-24 09:48
chunchill
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