A non-linkable query is a detail query that contains column objects that prevent the query from being linked to via a column-to-column link (when you create a column-to-column link, Reports Builder adds a WHERE clause to your query). If you attempt to create such a link, a message dialog box displays, which prompts you to choose whether to create a group-to-group query (using the parent groups), or to cancel the operation.

A non-linkable query displays in its title bar. Instead, you can create a group-to-group link (when you create a group-to-group link, Reports Builder does not add a WHERE clause to your query) between the two queries and add a WHERE clause to the child query's SELECT statement, using a bind variable to reference the parent column.