摘要：
Oracle uses a Data Dictionary to store details of all the Tables, Columns etc.. (check out the associated Data Model). You will normally be interested only in your own Tables, which are provided by the 'USER' views, which are for the User who is currently logged in.
The System Administrator or DBA will usually be interested in the 'ALL' Views, which show data for all Users. 阅读全文
Oracle uses a Data Dictionary to store details of all the Tables, Columns etc.. (check out the associated Data Model). You will normally be interested only in your own Tables, which are provided by the 'USER' views, which are for the User who is currently logged in.
The System Administrator or DBA will usually be interested in the 'ALL' Views, which show data for all Users. 阅读全文