While SQL has evolved with new standards (like SQL:2023), the foundational principles of the language remain unchanged. Martin Gruber’s work—most notably Understanding SQL and the SQL Workbench —is celebrated for several reasons:
Before your data ever reaches the PDF engine, you should use COALESCE or ISNULL to transform NULLs into user-friendly text.
While SQL has evolved with new standards (like SQL:2023), the foundational principles of the language remain unchanged. Martin Gruber’s work—most notably Understanding SQL and the SQL Workbench —is celebrated for several reasons:
Before your data ever reaches the PDF engine, you should use COALESCE or ISNULL to transform NULLs into user-friendly text. martin gruber understanding sqlpdf better