What is TAB in oracle10g why does not it display default table names for newly created user?

If I login as "system" then it shows default table names(select * from tab). But when I login as "jagan", if I run a query (select * from tab) it is not displaying...In order to display default ta开发者_运维知识库bles from "jagan", what should I do?

SELECT * FROM TAB will only show objects that have been created in the schema you are connected to (i.e. JAGAN): until you create some objects there will be none to see.

TAB lists tables, clusters, views and synonyms from the current schema.

Oracle provides a number of other dictionary views that give more information:

• USER_TABLES - all tables owned by the current user.
• ALL_TABLES - all tables visible to the current user.
• DBA_TABLES - all tables.

To view other objects as well as tables:

• USER_OBJECTS - all owned by the current user.
• ALL_OBJECTS - all visible to the current user.
• DBA_OBJECTS - all objects.