drop table employee;
drop table department;
drop table address;
drop table comp_key_employee;
drop table comp_key_department;
drop table comp_key_address;
-- supported
drop table integer_table;
drop table int_table;
drop table double_table;
drop table double_precision_table;
drop table float_table;
drop table varchar_table;
drop table varchar_ignorecase_table;
drop table char_table;
drop table character_table;
drop table longvarchar_table;
drop table date_table;
drop table time_table;
drop table timestamp_table;
drop table datetime_table;
drop table decimal_table;
drop table numeric_table;
drop table boolean_table;
drop table bit_table;
drop table tinyint_table;
drop table smallint_table;
drop table bigint_table;
drop table real_table;
drop table varbinary_table;
drop table longvarbinary_table;
drop table テーブル;