SELECT COUNT(FS_Rechnung) FROM tbl_trans
SELECT name, COUNT(vorname) FROM tbl_personen group by name
SELECT FS_Rechnung, COUNT(FS_Artikel) FROM tbl_trans GROUP BY FS_Rechnung



SELECT * FROM tbl_personen, tbl_rechnungen
Beispiel für einen Full-Join (kartesisches Produkt

SELECT * FROM tbl_personen, tbl_rechnungen
  WHERE tbl_personen.Person_ID = tbl_rechnungen.Person_FS


SELECT * FROM tbl_personen INNER JOIN tbl_rechnungen
  ON tbl_personen.Person_ID = tbl_rechnungen.Person_FS

SELECT * FROM tbl_personen LEFT JOIN tbl_rechnungen
  ON tbl_personen.Person_ID = tbl_rechnungen.Person_FS

SELECT * FROM tbl_personen RIGHT JOIN tbl_rechnungen
  ON tbl_personen.Person_ID = tbl_rechnungen.Person_FS


SELECT * FROM tbl_personen AS p INNER JOIN tbl_rechnungen AS r
  ON p.Person_ID = r.Person_FS
  INNER JOIN tbl_trans AS t ON r.Rechnungs_ID = t.FS_Rechnung
ORDER BY Person_ID

SELECT * FROM tbl_personen AS p INNER JOIN tbl_rechnungen AS r
  ON p.Person_ID = r.Person_FS
  INNER JOIN tbl_trans AS t ON r.Rechnungs_ID = t.FS_Rechnung
    INNER JOIN tbl_artikel AS a ON t.FS_Artikel = a.Artikel_ID
ORDER BY Person_ID


SELECT * FROM tbl_personen AS p INNER JOIN tbl_rechnungen AS r
  ON p.Person_ID = r.Person_FS
  INNER JOIN tbl_trans AS t ON r.Rechnungs_ID = t.FS_Rechnung
    LEFT OUTER JOIN tbl_artikel AS a ON t.FS_Artikel = a.Artikel_ID
ORDER BY Person_ID


SELECT * FROM tbl_personen AS p INNER JOIN tbl_rechnungen AS r
  ON p.Person_ID = r.Person_FS
  LEFT OUTER JOIN tbl_trans AS t ON r.Rechnungs_ID = t.FS_Rechnung
    LEFT OUTER JOIN tbl_artikel AS a ON t.FS_Artikel = a.Artikel_ID
ORDER BY Person_ID

SELECT * FROM tbl_personen AS p LEFT OUTER JOIN tbl_rechnungen AS r
  ON p.Person_ID = r.Person_FS
  LEFT OUTER JOIN tbl_trans AS t ON r.Rechnungs_ID = t.FS_Rechnung
    LEFT OUTER JOIN tbl_artikel AS a ON t.FS_Artikel = a.Artikel_ID
ORDER BY Person_ID