hive delete data, delete partition, delete the database table

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--  删除库
drop database if exists db_name;
--  强制删除库
drop database if exists db_name cascade;

--  删除表
drop table if exists employee;

--  清空表
truncate table employee;
--  清空表，第二种方式
insert overwrite table employee select * from employee where 1=0; 

--  删除分区
alter table employee_table drop partition (stat_year_month>='2018-01');

--  按条件删除数据
insert overwrite table employee_table select * from employee_table where id>'180203a15f';