diff --git a/music_library.livemd b/music_library.livemd
index 951a0e62..8e853270 100644
--- a/music_library.livemd
+++ b/music_library.livemd
@@ -20,9 +20,7 @@ opts = [
 {:ok, conn} = Kino.start_child({Exqlite, opts})
 ```
 
-## Aggregates
-
-### Number of releases per record
+## Number of releases per record
 
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@@ -43,7 +41,7 @@ count_by_releases =
   )
 ```
 
-### Count of records per artist
+## Count of records per artist
 
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@@ -72,7 +70,7 @@ VegaLite.new(width: 600, title: "Count by Artist")
 |> VegaLite.encode_field(:y, "name", type: :nominal)
 ```
 
-### Count of records by genre
+## Count of records by genre
 
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@@ -109,3 +107,25 @@ VegaLite.new(width: 600, title: "Count by genre")
 |> VegaLite.encode_field(:x, "c", type: :quantitative)
 |> VegaLite.encode_field(:y, "value", type: :nominal)
 ```
+
+## All unique genres
+
+<!-- livebook:{"attrs":"eyJjYWNoZV9xdWVyeSI6dHJ1ZSwiY29ubmVjdGlvbiI6eyJ0eXBlIjoic3FsaXRlIiwidmFyaWFibGUiOiJjb25uIn0sImRhdGFfZnJhbWVfYWxpYXMiOiJFbGl4aXIuRXhwbG9yZXIuRGF0YUZyYW1lIiwicXVlcnkiOiJzZWxlY3QgZGlzdGluY3QgZ2VucmUudmFsdWVcbmZyb20gcmVjb3JkcywganNvbl9lYWNoKHJlY29yZHMuZ2VucmVzKSBnZW5yZVxuO1xuIiwicmVzdWx0X3ZhcmlhYmxlIjoiZ2VucmVzIiwidGltZW91dCI6bnVsbH0","chunks":null,"kind":"Elixir.KinoDB.SQLCell","livebook_object":"smart_cell"} -->
+
+```elixir
+genres =
+  Exqlite.query!(
+    conn,
+    ~S"""
+    select distinct genre.value
+    from records, json_each(records.genres) genre
+    ;
+
+    """,
+    []
+  )
+```
+
+```elixir
+Enum.join(genres.rows, ",")
+```