1) Open the existing report that points to the table above > Go to the Database option on the top > Click 'Show SQL' > Copy the SQL.
2) Go to create new report > Database Expert > Click the 'Add Command' option > Paste the SQL Query > Modify the query and include the Where Exists Subquery along with the tables alias.
The existing sql should have the schema and table qualifier - if it doesn't, that's OK.
-Abhilash
