Oracle 獲取表注釋和列注釋

全部表

select table_name from user_tables; //當前用戶擁有的表   
select table_name from all_tables; //所有用戶的表 
select table_name from dba_tables; //包括系統表 

表的注釋

select * from user_tab_comments; //當前用戶擁有表的注釋
select * from dba_tab_comments; //全部用戶表的注釋
select * from all_tab_comments; //全部用戶表的注釋

dba_tab_comments, all_tab_comments 比 user_tab_comments 要多一個ower列 

列的注釋

select * from user_col_comments;
select * from dba_col_comments;
select * from all_col_comments;

dba_col_comments，all_col_comments，這兩個比user_col_comments多了ower列