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Jan 23rd, 2018
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  1. "_id" : "",
  2. "filmes" : [
  3. {
  4. "nome" : "Filme 1",
  5. "categoria" : "terror",
  6. "qtd" : 7
  7. },
  8. {
  9. "nome" : "Filme 2",
  10. "categoria" : "comedia",
  11. "qtd" : 7
  12. },
  13. {
  14. "nome" : "FIlme 3",
  15. "categoria" : "terror",
  16. "qtd" : 7
  17. },
  18. {
  19. "nome" : "Filme 4",
  20. "categoria" : "terror",
  21. "qtd" : 7
  22. },
  23. {
  24. "nome" : "Filme 5",
  25. "categoria" : "comedia",
  26. "qtd" : 7
  27. },
  28. {
  29. "nome" : "Filme 6",
  30. "categoria" : "romance",
  31. "qtd" : 7
  32. },
  33. ]
  34.  
  35. "_id" : "",
  36. "livros" : [
  37. {
  38. "categoria" : "terror",
  39. "qtd" : 21
  40. },
  41. {
  42. "categoria" : "comedia",
  43. "qtd" : 14
  44. },
  45. {
  46. "categoria" : "romance",
  47. "qtd" : 7
  48. },
  49. ]
  50.  
  51. db.filmes.aggregate(
  52. [
  53. {
  54. $project:
  55. {
  56. _id: "$_id",
  57. totalfilmes: { $sum: "$filmes.qtd" }
  58. }
  59. }
  60. ]
  61. )
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