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ubuntu系统常用命令： https://www.cnblogs.com/ENU7/p/12163573.html 节点间复制文件 1.拷贝整个目录： scp -r /usr/local/test/ admin@hostname:/usr/local/ 2.拷贝单个文件： scp [-P port 阅读全文
摘要：
SELECT DISTINCT * FROM t[,t1] WHERE condition GROUP BY column HAVING conditions ORDER BY column [ASC|DESC] LIMIT N,M; AND,OR,LIKE LIMIT M OFFSET N;con 阅读全文