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Jun 28th, 2017
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  1. select t2.KrajOdbiorcy, t2.ile, IDspedytora from
  2. (
  3. select KrajOdbiorcy, count(z.IDspedytora) as ile, z.IDspedytora from Zamówienia z
  4. join Spedytorzy s on s.IDspedytora = z.IDspedytora
  5. group by KrajOdbiorcy, z.IDspedytora
  6. ) as t2
  7. join(
  8. select max(ile) as ile, KrajOdbiorcy from
  9. (
  10. select KrajOdbiorcy, count(z.IDspedytora) as ile, z.IDspedytora from Zamówienia z
  11. join Spedytorzy s on s.IDspedytora = z.IDspedytora
  12. group by KrajOdbiorcy, z.IDspedytora
  13. ) as t1
  14. group by KrajOdbiorcy
  15. )as t3
  16. on t2.KrajOdbiorcy = t3.KrajOdbiorcy
  17. where(t2.ile = t3.ile)
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