hive 建表 分区语句（仅供参考）

create table test_01(
              name string,
              friends array,
              children map,
              address struct)
              row format delimited fields terminated by ','
              collection items terminated by '_'
              map keys terminated by ':'
              lines terminated by '\n';
              
              
create table student01(id int ,name string)
              > row format delimited fields terminated by ','
              > stored as textfile location '/user/hive/warehouse/';
              
              
create table if not exists student2 (id int ,name string)
               row format delimited fields terminated by ',' stored as textfile
               location '/user/hive/warehouse/student2';
创建外部表：
create external table dept (deptno int , dname string,loc string) row format delimited fields terminated by '\t';

load data local inpath '/home/hadoop/data/dept.txt' into table dept;

create external table if not exists default.emp( 
empno int ,
ename string,
job string ,
mgr int,
hiredate string,
sal double,
comm double,
deptno int) 
row format delimited fields terminated by '\t';

load data local inpath '/home/hadoop/data/emp.txt' into table emp;

创建分区：
create table dept_partition(deptno  int , dname string,loc string)
partitioned by (month string)
row format delimited fields terminated  by '\t';

load data local inpath '/home/hadoop/data/dept.txt' into table default.dept_partition partition(month='201709');
load data local inpath '/home/hadoop/data/dept.txt' into table default.dept_partition partition(month='201708');
load data local inpath '/home/hadoop/data/dept.txt' into table default.dept_partition partition(month='201710');

单分区查询
select * from dept_partition where month='201709';
多分区的联合查询
select * from dept_partition where month='201709'
union
select * from dept_partition where month='201708'
union
select * from dept_partition where month='201707';

添加单个分区：
alter table dept_partition add partition(month='201706');

添加多个分区：
alter table dept_partition add partition(month='201705') partition(month='201704');

删除单个分区：
alter table dept_partition drop partition(month='201704');

删除多个分区：
alter table dept_partition drop partition(month='201705'), partition(month='201706');

查看有多少分区：
show partitions dept_partition;

创建二级分区表：
create table dept_partition2(deptno  int , dname string,loc string)
partitioned by (month string,day string)
row format delimited fields terminated  by '\t';

load data local inpath '/home/hadoop/data/dept.txt' into table default.dept_partition2 partition(month='201710',day='10');

select * from dept_partition2 where month='201709' and day='13';