Claudio Ortolina
112 lines
5.6 KiB
Markdown
112 lines
5.6 KiB
Markdown
# Music Library
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```elixir
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Mix.install([
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{:kino_db, "~> 0.2.10"},
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{:exqlite, "~> 0.23.0"},
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{:kino_vega_lite, "~> 0.1.11"}
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])
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```
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## Setup
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<!-- livebook:{"attrs":"eyJkYXRhYmFzZV9wYXRoIjoiL1VzZXJzL2Nsb3VkL2dpdGh1Yi5jb20vY2xvdWQ4NDIxL211c2ljX2xpYnJhcnkvZGF0YS9tdXNpY19saWJyYXJ5X2Rldi5kYiIsInR5cGUiOiJzcWxpdGUiLCJ2YXJpYWJsZSI6ImNvbm4ifQ","chunks":null,"kind":"Elixir.KinoDB.ConnectionCell","livebook_object":"smart_cell"} -->
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```elixir
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opts = [
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database: "/Users/cloud/github.com/cloud8421/music_library/data/music_library_dev.db"
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]
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{:ok, conn} = Kino.start_child({Exqlite, opts})
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```
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## Aggregates
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### Number of releases per record
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<!-- livebook:{"attrs":"eyJjYWNoZV9xdWVyeSI6dHJ1ZSwiY29ubmVjdGlvbiI6eyJ0eXBlIjoic3FsaXRlIiwidmFyaWFibGUiOiJjb25uIn0sImRhdGFfZnJhbWVfYWxpYXMiOiJFbGl4aXIuRXhwbG9yZXIuRGF0YUZyYW1lIiwicXVlcnkiOiJzZWxlY3RcbiAgZGlzdGluY3QganNvbl9leHRyYWN0KGFydGlzdHMsICckWzBdLm5hbWUnKSBBUyBhcnRpc3RfbmFtZSxcbiAgdGl0bGUsXG4gIGpzb25fYXJyYXlfbGVuZ3RoKHJlbGVhc2VfaWRzKSBBUyBudW1iZXJfb2ZfcmVsZWFzZXNcbmZyb20gcmVjb3Jkc1xub3JkZXIgYnkgbnVtYmVyX29mX3JlbGVhc2VzIGRlc2NcbjsiLCJyZXN1bHRfdmFyaWFibGUiOiJjb3VudF9ieV9yZWxlYXNlcyIsInRpbWVvdXQiOm51bGx9","chunks":null,"kind":"Elixir.KinoDB.SQLCell","livebook_object":"smart_cell"} -->
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```elixir
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count_by_releases =
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Exqlite.query!(
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conn,
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~S"""
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select
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distinct json_extract(artists, '$[0].name') AS artist_name,
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title,
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json_array_length(release_ids) AS number_of_releases
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from records
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order by number_of_releases desc
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;
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""",
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[]
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)
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```
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### Count of records per artist
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<!-- livebook:{"attrs":"eyJjYWNoZV9xdWVyeSI6dHJ1ZSwiY29ubmVjdGlvbiI6eyJ0eXBlIjoic3FsaXRlIiwidmFyaWFibGUiOiJjb25uIn0sImRhdGFfZnJhbWVfYWxpYXMiOiJFbGl4aXIuRXhwbG9yZXIuRGF0YUZyYW1lIiwicXVlcnkiOiJzZWxlY3QganNvbl9leHRyYWN0KGFydGlzdC52YWx1ZSwgJyQubmFtZScpIGFzIG5hbWUsIGNvdW50KDEpIGFzIGNcbmZyb20gcmVjb3JkcywganNvbl9lYWNoKHJlY29yZHMuYXJ0aXN0cykgYXJ0aXN0XG5ncm91cCBieSBuYW1lXG5vcmRlciBieSBjIGRlc2NcbjsiLCJyZXN1bHRfdmFyaWFibGUiOiJjb3VudF9ieV9hcnRpc3QiLCJ0aW1lb3V0IjpudWxsfQ","chunks":null,"kind":"Elixir.KinoDB.SQLCell","livebook_object":"smart_cell"} -->
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```elixir
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count_by_artist =
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Exqlite.query!(
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conn,
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~S"""
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select json_extract(artist.value, '$.name') as name, count(1) as c
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from records, json_each(records.artists) artist
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group by name
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order by c desc
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;
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""",
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[]
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)
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```
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<!-- livebook:{"attrs":"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","chunks":null,"kind":"Elixir.KinoVegaLite.ChartCell","livebook_object":"smart_cell"} -->
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```elixir
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VegaLite.new(width: 600, title: "Count by Artist")
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|> VegaLite.data_from_values(count_by_artist, only: ["c", "name"])
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|> VegaLite.mark(:bar)
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|> VegaLite.encode_field(:x, "c", type: :quantitative)
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|> VegaLite.encode_field(:y, "name", type: :nominal)
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```
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### Count of records by genre
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<!-- livebook:{"attrs":"eyJjYWNoZV9xdWVyeSI6dHJ1ZSwiY29ubmVjdGlvbiI6eyJ0eXBlIjoic3FsaXRlIiwidmFyaWFibGUiOiJjb25uIn0sImRhdGFfZnJhbWVfYWxpYXMiOiJFbGl4aXIuRXhwbG9yZXIuRGF0YUZyYW1lIiwicXVlcnkiOiJzZWxlY3QgZ2VucmUudmFsdWUsIGNvdW50KGdlbnJlLnZhbHVlKSBhcyBjXG5mcm9tIHJlY29yZHMsIGpzb25fZWFjaChyZWNvcmRzLmdlbnJlcykgZ2VucmVcbmdyb3VwIGJ5IGdlbnJlLnZhbHVlXG5vcmRlciBieSBjIGRlc2NcbjtcbiIsInJlc3VsdF92YXJpYWJsZSI6ImNvdW50X2J5X2dlbnJlIiwidGltZW91dCI6bnVsbH0","chunks":null,"kind":"Elixir.KinoDB.SQLCell","livebook_object":"smart_cell"} -->
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```elixir
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count_by_genre =
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Exqlite.query!(
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conn,
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~S"""
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select genre.value, count(genre.value) as c
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from records, json_each(records.genres) genre
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group by genre.value
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order by c desc
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;
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""",
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[]
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)
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```
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```elixir
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VegaLite.new(width: 600, title: "Count by genre (alt)")
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|> VegaLite.data_from_values(count_by_genre, only: ["c", "value"])
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|> VegaLite.mark(:bar)
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|> VegaLite.encode_field(:x, "c", type: :quantitative)
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|> VegaLite.encode_field(:y, "value", type: :nominal, sort: "-c")
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```
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<!-- livebook:{"attrs":"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","chunks":null,"kind":"Elixir.KinoVegaLite.ChartCell","livebook_object":"smart_cell"} -->
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```elixir
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VegaLite.new(width: 600, title: "Count by genre")
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|> VegaLite.data_from_values(count_by_genre, only: ["c", "value"])
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|> VegaLite.mark(:bar)
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|> VegaLite.encode_field(:x, "c", type: :quantitative)
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|> VegaLite.encode_field(:y, "value", type: :nominal)
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```
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