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完整建表语句

CREATE [TEMPORARY] [EXTERNAL] TABLE [IF NOT EXISTS] [db_name.]table_name    -- (Note: TEMPORARY available in Hive 0.14.0 and later)  [(col_name data_type [COMMENT col_comment], ... [constraint_specification])]  [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]  [SKEWED BY (col_name, col_name, ...)                  -- (Note: Available in Hive 0.10.0 and later)]     ON ((col_value, col_value, ...), (col_value, col_value, ...), ...)     [STORED AS DIRECTORIES]  [   [ROW FORMAT row_format]    [STORED AS file_format]     | STORED BY 'storage.handler.class.name' [WITH SERDEPROPERTIES (...)]  -- (Note: Available in Hive 0.6.0 and later)  ]  [LOCATION hdfs_path]  [TBLPROPERTIES (property_name=property_value, ...)]   -- (Note: Available in Hive 0.6.0 and later)  [AS select_statement];   -- (Note: Available in Hive 0.5.0 and later; not supported for external tables)

介绍：
[TEMPORARY]：临时表，当sesssion关闭时，表会被删除
[EXTERNAL]：外部表,与 [LOCATION hdfs_path]对应，外部表的位置，删除外部表，文件不会从hdfs上删除
[PARTITIONED BY (col_name data_type [COMMENT col_comment], …)]：根据后面字段进行分区，对应于hdfs上table级下又的子文件夹，注意，不能是hive中已经存在的字段
[CLUSTERED BY (col_name, col_name, …) [SORTED BY (col_name [ASC|DESC], …)] INTO num_buckets BUCKETS]：分桶，根据后面字段进行分桶，并且排序，对应与mr中的partation，方便数据采样
[SKEWED BY (col_name, col_name, …) – (Note: Available in Hive 0.10.0 and later)] ON ((col_value, col_value, …), (col_value, col_value, …), …)
[STORED AS DIRECTORIES]:hive标记这个表是倾斜表， (col_name, col_name, …)指倾斜的列，on后跟随的是倾斜的值。
[
[ROW FORMAT row_format]
[STORED AS file_format]
| STORED BY ‘storage.handler.class.name’ [WITH SERDEPROPERTIES (…)] – (Note: Available in Hive 0.6.0 and later)
]：ROW FORMAT row_format 定义数据之间的分割符，[STORED AS file_format]指定文件存储格式，
[TBLPROPERTIES (property_name=property_value, …)] ：hive中表内置了一部分属性，并且可以根据这个进行表属性的修改
[AS select_statement]：在创建表的时候，导入数据。