技術標籤：hadoop# hivehive大資料

建立分割槽表

create table student_par(id int,name string)
partitioned by (class string) 
row format delimited fields terminated by '\t';

載入資料

load data local inpath '/opt/module/hive/datas/student.txt' into table student_par partition(class='class01');

insert into table student_par partition
 
(class="class02") select * from student; 

insert overwrite table student_par partition(class="class02") select * from student where id=1001;

查詢指定分割槽資料

select * from student_par where class='class01';

增加分割槽

alter table student_par add partition(class="class03");

alter table
 
 student_par add partition(class="class04") partition(class="class05");

查看錶所有分割槽

show partitions student_par;

刪除分割槽

alter table student_par drop partition(class="class03");

alter table student_par drop partition(class="class04"),partition(class="class05"
 
);

建立二級分割槽

create table student_par2(id int,name string)
partitioned by (class string,grade string)
row format delimited fields terminated by '\t';

載入資料

load data local inpath '/opt/module/hive/datas/student.txt' into table student_par2 partition(class='class01',grade="1");

修復分割槽資料不顯示

-- 方式1 上傳資料後修復
msck repair table student_par2;
-- 方式2 上傳資料後新增對應分割槽
alter table student_par2 add partition(class='class01',grade="2");
-- 方式3 上傳資料同時指定分割槽
load data local inpath '/opt/module/hive/datas/student.txt' into table student_par2 partition(class='class01',grade='3');