what the difference between object u and object v?

[arthurtangel]

query in sql windows:

SELECT * FROM v;
ORA-04044: procedure, function, package, or type is not allowed here

select * from u;
ORA-00942: table or view does not exist

both object u and v doesn't exists in oracle,
why they return different error message?

 

[arthurtangel]

ohh,V is a funtion for schema APEX_030200 .