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R Tyler Croy 2021-06-13 19:25:04 -07:00
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README.adoc
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= Delta Lake Shell
`dlsh` is a shell for simple querying of Delta Lake tables.
[source]
----
dlsh> load ./data/COVID-19_NYT as covid
dlsh> select * from covid where county = 'Sonoma' order by date desc limit 5
+------------+--------+------------+------+-------+--------+
| date | county | state | fips | cases | deaths |
+------------+--------+------------+------+-------+--------+
| 2021-03-11 | Sonoma | California | 6097 | 28638 | 306 |
| 2021-03-10 | Sonoma | California | 6097 | 28601 | 306 |
| 2021-03-09 | Sonoma | California | 6097 | 28571 | 306 |
| 2021-03-08 | Sonoma | California | 6097 | 28533 | 303 |
| 2021-03-07 | Sonoma | California | 6097 | 28484 | 303 |
+------------+--------+------------+------+-------+--------+
dlsh> load ./data/simple_table as simple
dlsh> select * from covid where county = 'Sonoma' order by date desc limit 5
+------------+--------+------------+------+-------+--------+
| date | county | state | fips | cases | deaths |
+------------+--------+------------+------+-------+--------+
| 2021-03-11 | Sonoma | California | 6097 | 28638 | 306 |
| 2021-03-10 | Sonoma | California | 6097 | 28601 | 306 |
| 2021-03-09 | Sonoma | California | 6097 | 28571 | 306 |
| 2021-03-08 | Sonoma | California | 6097 | 28533 | 303 |
| 2021-03-07 | Sonoma | California | 6097 | 28484 | 303 |
+------------+--------+------------+------+-------+--------+
dlsh> select * from simple
+----+
| id |
+----+
| 5 |
| 7 |
| 9 |
+----+
dlsh>
----