1.基本数据类型

因为hive也是java语言编写的,所以他的基本数据类型和java的大致相同:

2.基本数据类型

(1)array(数组)

特点:个数可以不相同,但是类型相同 例:以family表(name string familes array<string>)为例:

#建表语句:
create table t_family (name string, familes array<string>) row format delimited fields terminated by '\t' collection items  terminated  by ',';
#查询
select * from t_family;

#查询数组中的某一个
select  name, familes[0] from t_family; 

(2)map ----映射

特点:key-value 可以不相同,个数也可以不同 数据格式:zs age:28,salary:20000,address:beijing

#建表语句:
create table user_info(name string,info map<string,string>) row format delimieted fields terminated by '\t' collection items terminated by ',' map keys terminated by ':'
#查询语句
select * from user_info;

#查询具体的map的key的值
select name ,info['age'],info['salary']  from user_info ;

(3)struct类型 ----对象

特点:个数相同,类型相同 例: 以stu(name ,info)为例 数据格式:zss 26,123456,shanghai,695

#建表语句:
`create table stu_info(name string, info struct<age:int,id:string,address:string,score:double>) row format delimted fields terminated by '\t' collection items terminated by ','`
#查询语句
select * from stu_info;

#具体的对象属性查询
select name,info.address from stu_info;