在hive上建立乙個簡單的分割槽表:
create table `school_student_info`(
`name` string,
`age` int,
`***` string
)partitioned by (`grade` string,
`teacher` string)
row format serde
'org.apache.hadoop.hive.serde2.lazy.lazy******serde'
with serdeproperties (
'field.delim'=',',
'serialization.format'=',',
'serialization.null.format'='');
hive引數說明:
1、 靜態插入資料
insert overwrite table school_student_info partition(grade=』three』,teacher=』li』)
select name,age,***,grade,teacher from table_old where grade=』three』 and teacher=』li』
要保證select中的字段個數和位置與插入的分割槽表的字段個數和位置對應。否則匯報如下錯誤:
failed: semanticexception [error 10044]: line 1:23 cannot insert into target table because column number/types are different 『symbol』: table insclause-0 has 4 columns, but query has 5 columns.
2、 動靜態混合分割槽插入
insert overwrite table school_student_info partition(grade=』three』,teacher)
select name,age,***,teacher from table_old where grade=』three』 and teacher=』li』
3、 動態分割槽插入
insert overwrite table school_student_info partition(grade,teacher)
select name,age,***,grade,teacher from table_old where grade=』three』 and teacher=』li』
grade和teacher根據select返回記錄的相對位置進行取值, hive 非分割槽表 匯入csv資料
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