ETL input, json

data.json

[
  {
    "name": "Janette Carbonaro",
    "age": 27,
    "score": 40,
    "previous_score": 55
  },
  {
    "name": "Yoshie Craven",
    "age": 20,
    "score": 43,
    "previous_score": null
  },
  {
    "name": "Corine Scoggins",
    "age": 57,
    "score": 91,
    "previous_score": null
  },
  {
    "name": "Jaquelyn Cashion",
    "age": 32,
    "score": 96,
    "previous_score": null
  },
  {
    "name": "Johnny Irby",
    "age": 75,
    "score": 79,
    "previous_score": 98
  },
  {
    "name": "Dewey Fulkerson",
    "age": 75,
    "score": 31,
    "previous_score": 76
  },
  {
    "name": "Angela Tsai",
    "age": 71,
    "score": 99,
    "previous_score": null
  },
  {
    "name": "Jaquelyn Cashion",
    "age": 69,
    "score": 89,
    "previous_score": null
  },
  {
    "name": "Tangela Madison",
    "age": 20,
    "score": 64,
    "previous_score": null
  },
  {
    "name": "Ina Moffett",
    "age": 60,
    "score": 12,
    "previous_score": 54
  },
  {
    "name": "Kenny Ruggeri",
    "age": 47,
    "score": 51,
    "previous_score": null
  },
  {
    "name": "Jae Slusher",
    "age": 43,
    "score": 27,
    "previous_score": null
  },
  {
    "name": "Deangelo Rance",
    "age": 43,
    "score": 14,
    "previous_score": 87
  },
  {
    "name": "Evita Mangini",
    "age": 77,
    "score": 75,
    "previous_score": null
  },
  {
    "name": "Adolph Billingslea",
    "age": 35,
    "score": 93,
    "previous_score": 99
  },
  {
    "name": "Adelaide Days",
    "age": 79,
    "score": 53,
    "previous_score": 77
  },
  {
    "name": "Leeanne Lefebure",
    "age": 69,
    "score": 42,
    "previous_score": null
  },
  {
    "name": "Clement Lawlor",
    "age": 33,
    "score": 85,
    "previous_score": null
  },
  {
    "name": "Kristan Rudisill",
    "age": 21,
    "score": 64,
    "previous_score": null
  },
  {
    "name": "Jaquelyn Cashion",
    "age": 49,
    "score": 87,
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  },
  {
    "name": "Tommy Amsler",
    "age": 28,
    "score": 72,
    "previous_score": null
  },
  {
    "name": "Everett Pierro",
    "age": 43,
    "score": 45,
    "previous_score": 84
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  {
    "name": "Shena Brinkmann",
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    "score": 31,
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  },
  {
    "name": "Franklin Privette",
    "age": 49,
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  {
    "name": "Antwan Bernardi",
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    "score": 67,
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  {
    "name": "Reina Sowder",
    "age": 58,
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  },
  {
    "name": "Stephanie Brook",
    "age": 25,
    "score": 59,
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  },
  {
    "name": "Estela Siguenza",
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    "score": 1,
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  },
  {
    "name": "Jaquelyn Cashion",
    "age": 21,
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  },
  {
    "name": "Derrick Roux",
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    "score": 91,
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  {
    "name": "Vito Dykema",
    "age": 65,
    "score": 69,
    "previous_score": null
  },
  {
    "name": "Pat Sterns",
    "age": 36,
    "score": 15,
    "previous_score": 56
  },
  {
    "name": "Simon Furr",
    "age": 82,
    "score": 6,
    "previous_score": null
  },
  {
    "name": "Simon Furr",
    "age": 57,
    "score": 98,
    "previous_score": 42
  },
  {
    "name": "Asuncion Geiser",
    "age": 59,
    "score": 23,
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  {
    "name": "Jarrett Holmer",
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  },
  {
    "name": "Guy Hickman",
    "age": 43,
    "score": 92,
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  },
  {
    "name": "Jae Slusher",
    "age": 32,
    "score": 69,
    "previous_score": null
  },
  {
    "name": "Tommy Amsler",
    "age": 76,
    "score": 25,
    "previous_score": 70
  },
  {
    "name": "Dewey Fulkerson",
    "age": 61,
    "score": 9,
    "previous_score": 69
  },
  {
    "name": "Jarred Arthur",
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    "previous_score": 0
  },
  {
    "name": "Dwight Petermann",
    "age": 24,
    "score": 64,
    "previous_score": null
  },
  {
    "name": "Cristopher Lamantia",
    "age": 56,
    "score": 56,
    "previous_score": 76
  },
  {
    "name": "Clement Lawlor",
    "age": 80,
    "score": 14,
    "previous_score": 8
  },
  {
    "name": "Janette Carbonaro",
    "age": 86,
    "score": 78,
    "previous_score": 44
  },
  {
    "name": "Simon Furr",
    "age": 25,
    "score": 31,
    "previous_score": null
  },
  {
    "name": "Eneida Defelice",
    "age": 89,
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  },
  {
    "name": "Debora Killinger",
    "age": 83,
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    "previous_score": null
  },
  {
    "name": "Tangela Madison",
    "age": 63,
    "score": 95,
    "previous_score": null
  },
  {
    "name": "Emmett Stiff",
    "age": 35,
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  },
  {
    "name": "Johnny Irby",
    "age": 28,
    "score": 18,
    "previous_score": 39
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  {
    "name": "Shena Brinkmann",
    "age": 26,
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  {
    "name": "Kathie Lively",
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    "previous_score": 3
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  {
    "name": "Jaquelyn Cashion",
    "age": 76,
    "score": 7,
    "previous_score": 53
  },
  {
    "name": "Eneida Defelice",
    "age": 47,
    "score": 40,
    "previous_score": 69
  },
  {
    "name": "Estela Siguenza",
    "age": 58,
    "score": 8,
    "previous_score": null
  },
  {
    "name": "Theressa Misner",
    "age": 48,
    "score": 22,
    "previous_score": 100
  },
  {
    "name": "Cristopher Lamantia",
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    "previous_score": 38
  },
  {
    "name": "Hung Castillon",
    "age": 48,
    "score": 61,
    "previous_score": 59
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  {
    "name": "Derrick Roux",
    "age": 61,
    "score": 88,
    "previous_score": null
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  {
    "name": "Justin Coletti",
    "age": 35,
    "score": 89,
    "previous_score": 13
  },
  {
    "name": "Tiny Lemanski",
    "age": 84,
    "score": 30,
    "previous_score": null
  },
  {
    "name": "Freeman Gump",
    "age": 66,
    "score": 56,
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  {
    "name": "Kathie Lively",
    "age": 49,
    "score": 87,
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  },
  {
    "name": "Valarie Vath",
    "age": 54,
    "score": 92,
    "previous_score": 32
  },
  {
    "name": "Lauren Brittingham",
    "age": 61,
    "score": 99,
    "previous_score": 55
  },
  {
    "name": "Derrick Roux",
    "age": 40,
    "score": 37,
    "previous_score": 47
  },
  {
    "name": "Carmen Asher",
    "age": 42,
    "score": 38,
    "previous_score": null
  },
  {
    "name": "Del Dress",
    "age": 42,
    "score": 66,
    "previous_score": 88
  },
  {
    "name": "Nathan Debartolo",
    "age": 45,
    "score": 88,
    "previous_score": null
  },
  {
    "name": "Joyce Pullman",
    "age": 59,
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  {
    "name": "Emmett Stiff",
    "age": 61,
    "score": 61,
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  },
  {
    "name": "Jarred Arthur",
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    "score": 14,
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  },
  {
    "name": "Vito Dykema",
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  },
  {
    "name": "Fatimah Stultz",
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  {
    "name": "Kathie Lively",
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  {
    "name": "Erin Canty",
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  {
    "name": "Dale Dittrich",
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  {
    "name": "Jazmin Werner",
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  {
    "name": "Leeanne Lefebure",
    "age": 54,
    "score": 46,
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  {
    "name": "Leeanne Lefebure",
    "age": 40,
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  {
    "name": "Annette Boatwright",
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  {
    "name": "Darren Knickerbocker",
    "age": 59,
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  {
    "name": "Freeman Gump",
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  },
  {
    "name": "Tyree Bilbo",
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  {
    "name": "Vernia Boone",
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  {
    "name": "Alaina Peete",
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  },
  {
    "name": "Sol Antonio",
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  },
  {
    "name": "Simon Furr",
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  },
  {
    "name": "Angelo Hanchett",
    "age": 32,
    "score": 58,
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  },
  {
    "name": "Pam Roten",
    "age": 48,
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  },
  {
    "name": "Tatiana Shull",
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  },
  {
    "name": "Tangela Madison",
    "age": 22,
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  {
    "name": "Annette Boatwright",
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  },
  {
    "name": "Del Dress",
    "age": 26,
    "score": 18,
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  },
  {
    "name": "Justin Coletti",
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  },
  {
    "name": "Kristan Rudisill",
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  },
  {
    "name": "Latosha Shoemaker",
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    "score": 24,
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  },
  {
    "name": "Tommy Amsler",
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  },
  {
    "name": "Fatimah Stultz",
    "age": 26,
    "score": 6,
    "previous_score": null
  }
]