hive创建外部表

Create [EXTERNAL] TABLE [IF NOT EXISTS] table_name 
[(col_name data_type [COMMENT col_comment], ...)] 
[COMMENT table_comment] 
[PARTITIONED BY (col_name data_type [COMMENT col_comment], ...)] 
[CLUSTERED BY (col_name, col_name, ...) [SORTED BY (col_name [ASC|DESC], ...)] INTO num_buckets BUCKETS] 
[ROW FORMAT row_format] 
[STORED AS file_format] 
[LOCATION hdfs_path]

例子：

create EXTERNAL table IF NOT EXISTS userInfo (id int,sex string, age int, name string, email string,sd string, ed string)  ROW FORMAT DELIMITED FIELDS TERMINATED BY '\t' location '/hive/dw';

注意：location必须是个目录，而不是文件！

t表：

a,aaa,bbb
2,ccc,ddd
adfd,eee,fff

创建T表：

create EXTERNAL table IF NOT EXISTS t (
id int,
s1 string,
s2 string
)  
ROW FORMAT DELIMITED 
FIELDS TERMINATED BY ',' 
location '/user/hive/warehouse/t';

查询：

hive> 
    > select * from t;
OK
NULL    bbb     NULL
2       ccc     ddd
NULL    eee     fff
Time taken: 2.051 seconds, Fetched: 3 row(s)

如果数据类型不对，则hive表示为NULL

来自为知笔记(Wiz)