假设表a有一个字段b,b存的是权重,范围0-100吧,我想随机查一条记录,但是按权重给出数据,该如何写呢
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mysql优化 - MySQL中使用UNION进行两表合并,去重导致效率低下,请问如何优化?
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windows10 系统 无法安装APPserv 组合包,各位前辈遇到过吗?
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mysql里show full processlist,进程很少
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From [MySQLdiscussion group] 2017-04-17 15:14:42 0 1 807
MYSQL: Best choice for accent-sensitive but case-insensitive UTF settings
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mysql - sql中的in与not in,exists与not exists的区别?为什么not in 没有用到索引?
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使用c++返回mysql中的varchar类型数据,resultset的getString方法返回该数据报错
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python - flask copy source code Chapter 8 user role error occurs
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