摘要:
在mysql 下执行如下命令:select use_city,count(*) from data where os="Windows 2003 Std" group by use_city;得到的结果为: +-----------+----------+ | use_city | count(*) | +-----------+----------+ | Beijing | ... 阅读全文
posted @ 2008-07-17 00:58
dkcndk
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