Hive分区表

分区表

创建分区表语法

create table score(s_id string,c_id string,s_score int) partitioned by (month string) row format delimited fields terminated by '\t';

创建一个表带多个分区

create table score(s_id string,c_id string,s_score int) partitioned by (year string,month string,day string) row format delimited fields terminated by '\t';

加载数据到分区表中

load data local inpath '/export/servers/hivedatas/score.txt' into table score partition (month='202006');

加载数据到一个多分区的表中去

load data local inpath '/export/servers/hivedatas/score.txt' into table score2 partition(year='2020',month='06',day='01');

查看分区

show partitions score;

添加一个分区

alter table score add partition(month='202005')

同时添加多个分区

alter table score add partition(month='202004') partition(month='202003');

注意：添加分区之后就可以在hdfs文件系统当中看到表下面多了一个文件夹

删除分区

alter table score drop partition(month = '202006');