本博文的主要内容如下: Hive文件存储格式 Hive 操作之表操作:创建外.内部表 Hive操作之表操作:表查询 Hive操作之表操作:数据加载 Hive操作之表操作:插入单表.插入多表 Hive语法结构:where 查询.all 和 distinct 选项.基于 Partition 的查询.基于 HAVING 的查询. LIMIT 限制查询. GROUP BY 分组查询. ORDER BY 排序查询.SORT BY 查询.DISTRIBUTE BY 排序查询.CLUSTER BY 查询 H
Uint47 calculator 题目链接(点击) In the distant space, there is a technologically advanced planet. One day they provided the Earth with a code that could achieve the ultimate meaning of the universe. People were very happy, but found that this code can onl
HDU Today Time Limit: 15000/5000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 38420 Accepted Submission(s): 9298 Problem Description 经过锦囊相助,海东集团终于度过了危机,从此,HDU的发展就一直顺风顺水,到了2050年,集团已经相当规模了,据说进入了钱江肉丝经济开发区500强.这时候,
http://blog.sina.com.cn/s/blog_66474b16010182yu.html这篇可以较好地理解什么是外部表external #创建表人信息表 person(String name,int age) hive> create table person(name STRING,age INT)ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' ESCAPED BY '\\' STORED AS TEXTFILE; OK T
1.list转setSet set = new HashSet(new ArrayList()); 2.set转listList list = new ArrayList(new HashSet()); 3.数组转为listList stooges = Arrays.asList("Larry", "Moe", "Curly");或者String[] arr = {"1", "2"};List list =
1.list转set Set set = new HashSet( new ArrayList()); 2.set转list List list = new ArrayList( new HashSet()); 3.数组转为list List stooges = Arrays.asList( "Larry" , "Moe" , "Curly" ); 此时stooges中有有三个元素.注意:此时的list不能进行add操作,否则会报