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Jan 17th, 2018
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MySQL 0.35 KB | None | 0 0
  1. # Sebastian
  2. SELECT kategorie_nazwa,
  3.     (SELECT COUNT(posty_id) FROM posty WHERE posty.kategorie_id = k.kategorie_id GROUP BY kategorie_id) as ilePostow
  4. FROM kategorie AS k
  5.  
  6. # Michal
  7. select kategorie.kategorie_nazwa, count(posty.posty_id) from kategorie
  8. left join posty on posty.kategorie_id=kategorie.kategorie_id
  9. group by kategorie.kategorie_nazwa
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