hive load用法：
load data local inpath '/home/data/stg_activity_antirush_apply.txt' 
overwrite into table stg_activity_antirush_apply;  
關鍵字local 不加資料從hdfs上載入，如果加local資料從本地載入；
關鍵字overwrite 為覆蓋載入，會覆蓋掉原有的資料；
動態分割槽設定

也可以在配置檔案中修改
--SET hive.exec.dynamic.partition=true;  
--SET hive.exec.dynamic.partition.mode=nonstrict;  
--SET hive.exec.max.dynamic.partitions.pernode = 1000;  
--SET hive.exec.max.dynamic.partitions=1000;

<property>
    <name>hive.exec.dynamic.partition</name>
    <value>true</value>
    <description>Whether or not to allow dynamic partitions in DML/DDL.</description>
  </property>
  <property>
    <name>hive.exec.dynamic.partition.mode</name>
    <value>nonstrict</value>
    <description>
      In strict mode, the user must specify at least one static partition
      in case the user accidentally overwrites all partitions.
      In nonstrict mode all partitions are allowed to be dynamic.
    </description>
  </property>
  <property>
    <name>hive.exec.max.dynamic.partitions</name>
    <value>100000</value>
    <description>Maximum number of dynamic partitions allowed to be created in total.</description>
  </property>
  <property>
    <name>hive.exec.max.dynamic.partitions.pernode</name>
    <value>10000</value>
    <description>Maximum number of dynamic partitions allowed to be created in each mapper/reducer node.</description>
  </property>
  <property>
    <name>hive.exec.max.created.files</name>
    <value>100000</value>
    <description>Maximum number of HDFS files created by all mappers/reducers in a MapReduce job.</description>
  </property>
  
  
  
insert overwrite table dw_activity_antirush_apply PARTITION(DateID = ${etlDate}) --手動分割槽
select * from tablename;

insert into table dw_activity_antirush_apply PARTITION(DateID = ${etlDate}) --手動分割槽
select * from tablename;

insert overwrite table dw_activity_antirush_apply PARTITION(DateID) --動態分割槽
select *, column_name as dateid from tablename;

INSERT OVERWRITE會覆蓋表或分割槽中已存在的資料
INSERT INTO以追加資料的方式插入到表或分割槽，原有資料不會刪除
Insert可以插入表或分割槽，如果表是分割槽表，則Insert時需要指定插入到哪個分割槽