JSON file to table

Hi kbachova , 

You could save your above code as json file, then try below M code

let
    Source = Json.Document(File.Contents("C:\Users\<username>\Desktop\gantt.json")),
    #"Parsed JSON" = Json.Document(Source),
    #"Converted to Table" = Record.ToTable(#"Parsed JSON"),
    #"Transposed Table" = Table.Transpose(#"Converted to Table"),
    #"Promoted Headers" = Table.PromoteHeaders(#"Transposed Table", [PromoteAllScalars=true]),
    #"Expanded row_values" = Table.ExpandListColumn(#"Promoted Headers", "row_values"),
    #"Extracted Values" = Table.TransformColumns(#"Expanded row_values", {"row_values", each Text.Combine(List.Transform(_, Text.From), ","), type text}),
    #"Expanded column_definitions" = Table.ExpandListColumn(#"Extracted Values", "column_definitions"),
    #"Added Custom" = Table.AddColumn(#"Expanded column_definitions", "Custom", each Record.FieldNames([column_definitions])),
    #"Extracted Values1" = Table.TransformColumns(#"Added Custom", {"Custom", each Text.Combine(List.Transform(_, Text.From)), type text}),
    #"Removed Columns" = Table.RemoveColumns(#"Extracted Values1",{"column_definitions"}),
    #"Grouped Rows" = Table.Group(#"Removed Columns", {"row_values"}, {{"combine", each Text.Combine([Custom], ","), type text}}),
    #"Added Index" = Table.AddIndexColumn(#"Grouped Rows", "Index", 0, 1),
    #"Pivoted Column" = Table.Pivot(#"Added Index", List.Distinct(#"Added Index"[combine]), "combine", "row_values"),
    #"Demoted Headers" = Table.DemoteHeaders(#"Pivoted Column"),
    #"Split Column by Delimiter" = Table.SplitColumn(#"Demoted Headers", "Column2", Splitter.SplitTextByDelimiter(",", QuoteStyle.Csv), {"Column2.1", "Column2.2", "Column2.3"}),
    #"Promoted Headers1" = Table.PromoteHeaders(#"Split Column by Delimiter", [PromoteAllScalars=true]),
    #"Changed Type2" = Table.TransformColumnTypes(#"Promoted Headers1",{{"Index", Int64.Type}, {"Database_RecID", Int64.Type}, {"Index_Number", Int64.Type}, {"Support_Type", type text}})
in
    #"Changed Type2"

Best Regards,
Zoe Zhi

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