Add query of subsetted stats file.

Author: mbjones

sections/parquet-arrow.qmd

@@ -198,6 +198,32 @@ os.stat("low_coverage.parquet").st_size / (1024 * 1024)
 1.4038171768188477
 ```
 
+And last, we can query this new table that we have created:
+
+```{python}
+#| eval: false
+duckdb.sql("SELECT * from low_coverage order by sum desc").limit(10).show()
+```
+```
+┌──────────────────────────────────────────────────────────────────────────────────┬───────────────────┐
+│                                      bounds                                      │        sum        │
+│                                     varchar                                      │      double       │
+├──────────────────────────────────────────────────────────────────────────────────┼───────────────────┤
+│ [116.99340820312375, 117.00439453124875, 71.32324218750009, 71.33422851562509]   │ 9.999709300915525 │
+│ [116.99340820312375, 117.00439453124875, 71.32324218750009, 71.33422851562509]   │ 9.999709300915525 │
+│ [-77.78320312500044, -77.76123046875044, 81.47460937500003, 81.49658203125003]   │ 9.999367985118123 │
+│ [-154.6655273437501, -154.6435546875001, 70.88378906250009, 70.90576171875009]   │ 9.998618022818269 │
+│ [-116.36169433593756, -116.35620117187506, 77.39868164062501, 77.40417480468751] │ 9.998248625671277 │
+│ [95.05920410156227, 95.06469726562477, 71.65832519531251, 71.66381835937501]     │ 9.997617767005346 │
+│ [-100.64575195312506, -100.64025878906256, 78.31054687500001, 78.31604003906251] │ 9.997102780461583 │
+│ [123.91479492187477, 123.92028808593727, 73.11950683593751, 73.12500000000001]   │ 9.996871067852531 │
+│ [-167.684326171875, -167.6788330078125, 65.73669433593751, 65.74218750000001]    │ 9.995733779230603 │
+│ [158.52172851562472, 158.52722167968722, 69.99938964843751, 70.00488281250001]   │ 9.995298698978356 │
+├──────────────────────────────────────────────────────────────────────────────────┴───────────────────┤
+│ 10 rows                                                                                    2 columns │
+└──────────────────────────────────────────────────────────────────────────────────────────────────────┘
+```
+
 Amazingly, DuckDB and parquet handle all of this high-performance access without any server-side services running. Typically, remote data access would be provided through a server side service like a postgres database or some other heavyweight process. But in this case, all we have is a file on disk be served up by a standard web server, and all of the querying is done completely client-side, and quickly because of the beauty of the parquet file format.
 
 Of course, you can also download the whole parquet file and access it locally through duckdb as well!