摘要: Pig: 1. 内连接: join_table = join table1 by col1, join table2 by col2 2. 外连接: 左外连接:join_table = join table1 by col1 left outer, join table2 by col2 其中out 阅读全文
posted @ 2015-06-02 18:11 lihui1625 阅读(124) 评论(0) 推荐(0) 编辑