按照教程http://cn.soulmachine.me/blog/20140205/搭建总是出现如下问题: 2014-04-13 23:53:45,450 INFO org.apache.hadoop.hdfs.server.common.Storage: Lock on /home/hadoop/local/var/hadoop/hdfs/datanode/in_use.lock acquired by nodename 19771@node-10-00.example.com 2014-0
当没有用 EXISTS 引入子查询时,在选择列表中只能指定一个表达式.比如 select * from T_Employee where FNumber not in ( select top 5* from T_Employee order by FSalary desc)order by FSalary 在sql中执行出现错误 更正:select * from T_Employee where FNumber not in (select top 5 FNumber from T_Em