A search engine performs semantic analysis of unstructured search terms to generate relational database queries. By understanding the semantics, the search engine more effectively identifies and predicts what information the user is searching for and provides more in-depth user assistance. The search engine uses different ranking schemes to identify which data is most likely associated with search terms and provides both row level and object level data security. The search engine may identify ambiguous search requests and allows the user to select different join paths that create different mappings between the data. The search engine may generate worksheets containing the selected mappings.