All table in hive are in a database.
The database:
USE database_name;
SELECT query_specifications;
USE default;
SELECT current_database();
default/
DESCRIBE DATABASE [EXTENDED] db_name;
DESCRIBE SCHEMA [EXTENDED] db_name; -- (Note: Hive 1.1.0 and later)
Example
DESCRIBE DATABASE default;
+----------+------------------------+----------------------------+-------------+-------------+-------------+--+
| db_name | comment | location | owner_name | owner_type | parameters |
+----------+------------------------+----------------------------+-------------+-------------+-------------+--+
| default | Default Hive database | adl://home/hive/warehouse | public | ROLE | |
+----------+------------------------+----------------------------+-------------+-------------+-------------+--+
CREATE (DATABASE|SCHEMA) [IF NOT EXISTS] database_name
[COMMENT database_comment]
[LOCATION hdfs_path]
[WITH DBPROPERTIES (property_name=property_value, ...)];
show databases;