Oracle用SQL查询表结构和表主键

SELECT UC.TABLE_NAME, UCC.COLUMN_NAME
  FROM USER_CONSTRAINTS UC, USER_CONS_COLUMNS UCC
WHERE UC.CONSTRAINT_NAME = UCC.CONSTRAINT_NAME
   AND UC.TABLE_NAME = UPPER('DEMO_USER')
   AND CONSTRAINT_TYPE = 'P'




SELECT *
  FROM user_tab_columns
where table_name = 'DEMO_USER'