2021年4月6日
Hive常见面试题
摘要： 1、行列转换 行转列:collect_set/collect_list 列转行： select t1.*, t2.col3_newfrom (select 'a' as col1, 'b' as col2, '1,2,3' as col3union allselect 'c' as col1, 'd 阅读全文
posted @ 2021-04-06 10:35 再见傅里叶 阅读(88) 评论(0) 推荐(0) 编辑