一、创建表
语法:
create [temporary] [external] table [if not exists] [db_name.] table_name
[(col_name data_type [comment col_comment], ...)]
[comment table_comment]
[row format row_format]
[stored as file_format]例子:
create table if not exists person ( 
id int, 
name string
)
comment 'human table'
row format delimited
fields terminated by '\t'
lines terminated by '\n'
stored as textfile;

二、查看表的结构
语法;
desc[ribe] table_name;例子:
describe person;
三、修改表
语法:
alter table name rename to new_name
alter table name add columns (col_spec[, col_spec ...])
alter table name change column_name new_name new_type
alter table name replace columns (col_spec[, col_spec ...])修改表名:
 alter table person rename to human;

加列:
 alter table human add columns (age int);
删除列:

四、删除表
语法:
drop table [if exists] table_name;例子:
 drop table human;
五、数据插入、查询与删除
插入:
 insert into  human values(1,'pan',13);

查询:
select * from human;
删除:
truncate table table_name;
--  清空表,第二种方式
insert overwrite table table_name select * from table_name where 1=0; 