Oracle列出数据库所有表名和列名

1 显示所有表名:
select table_name from user_tables;

2 显示所有列名:
select OWNER, TABLE_NAME, COLUMN_NAME
from all_tab_columns
where table_name = atablename;

附:
创建临时表

CREATE GLOBAL TEMPORARY TABLE Table_name
(startdate DATE,
enddate DATE,
class CHAR(20))
ON COMMIT DELETE ROWS;