Qualify Table Names
Table names can be qualified by a schema name. (A schema is a named collection of tables in a database.) Reporter can display multiple identical table names; therefore, it may be necessary to prefix the schema to the table name to clarify which table is being referenced.
You can choose whether you want to use schemas. Using schemas means that you can specify a particular table that will not be dependent on the user or DBA. You can also include in a query tables of the same name but with different owners.
To select whether a schema (owner) should be used to qualify the selected table name in the query
In the Query Editor, click Edit, Add Schema to Query Table or Edit, Remove Schema from Query Table.