Oracle 11g Build table name capitalization issues

There was a problem querying this comment after annotating the table:

Add notes to a table

Comment on table emp is ' employee table ';

Query comments
Select COMMENTS from user_tab_comments where table_name= ' emp ';

Results:

Row not selected

Change statement:

Select COMMENTS from user_tab_comments where table_name= ' EMP ';

Query the results.

Reason:

Creating a table with Create, the table name defaults to uppercase in the dictionary table, so look up the uppercase table names when querying with the dictionary table.

If you want to create a lowercase table name, use "".

Oracle 11g Build table name capitalization issues