CREATE TABLE test_demo (value INT)PARTITIONED BY RANGE (id1 INT, id2 INT, id3 INT)(-- id1在(--∞,5]之间，id2在(-∞,105]之间，id3在(-∞,205]之间 PARTITION p5_105_205 VALUES LESS THAN (5, 105, 205),-- id1在(--∞,5]之间，id2在(-∞,105]之间，id3在(205,215]之间 PARTI...
create external table testljb(id int) partitioned by (age int); 1. 添加分区 官网说明: ALTER TABLE table_name ADD [IF NOT EXISTS] PARTITION partition_spec [LOCATION 'location'][, PARTITION partition_spec [LOCATION 'location'], ...]; partition_spec: : (partition_column = partition_col_v...
1、over从句规范:over(partition by ??? order by ??? row|range between ??? and ???),里面三个字段,2-4分别介绍三个字段的意义 2、group by不能用在over从句; 3、order by做全局排序,有partition by分组内排序;当order by缺少窗口条件从句,默认规范是组内range between unbounded preceding and current...
PARTITIONED BY RANGE (<partition_key> <data_type>, ...) (PARTITION [<partition_name>] VALUES LESS THAN (<cutoff>), [PARTITION [<partition_name>] VALUES LESS THAN (<cutoff>), ... ] PARTITION [<partition_name>] VALUES LESS THAN (<cutoff>|MAXVALUE) ) [ROW FORMAT <row_format>] [...
Range指的是行可以根据行逻辑上的限制,对窗口内的内容限制 比如近几天,近几个等等 partition by userid order by date range between 3 preceding and current row 窗口大小设置为该分区内小于本记录date-3天的窗口 前面的函数为聚合函数包含sum、count、avg、max、ntile、lead、lag、first_value、last_value等等...
) partitioned by (id string) row format delimited fields terminated by '\t' location '/data/inner/ODS/01/emp2'; // 报错 insert overwrite table emp2 partition(id) select * from emp; insert overwrite table emp2 partition(id) select *,EMPNO id from emp; ...
Hive中没有复杂的分区类型(List,Range,Hash)、各种复合分区,分区列不是表中的实际字段而是一个伪列,创建表时可以指定PARTITION BY 子句创建一个或多个分区,每个分区在HDFS中会自动创建一个独立的文件夹。 分区键不能和列名同名,不然会报 "FAILED: Error in semantic analysis: Column repeated in partitioning colum...
CREATE TABLE test (a INT, b STRING, c DOUBLE) PARTITIONED BY (date STRING) CLUSTERED BY (c) INTO 8 BUCKETS STORED AS ORC TBLPROPERTIES ("transactional"="true"); -- 创建范围分区ORC表。 DROP TABLE IF EXISTS t5; CREATE TABLE t5(id INT, value INT) PARTITIONED BY RANGE(amount INT) ...
ntile不支持rows between,range between. 示例 统计按照客户端分组,按年龄排序,将每个窗口分成3片(桶),返回每片(桶)的的分片(桶)信息。 另一种问法:把ios客户端的人群按年龄正序分成三部分,返回任意一部分的值。 select id,client,age,cume_dist() over(partition by client order by age) as rank_id ...
FUNCTION_NAME([argument_list])OVER([PARTITIONBYwindow_partition,…][ORDERBYwindow_ordering,…[ASC|DESC]])[{ROWS|RANGE}BETWEENframe_startANDframe_end]); FUNCTION_NAME:函数名称。如row_number()、sum()、first_value()等。 argument_list:函数的参数列表。