Skip to content
This repository has been archived by the owner on Nov 12, 2024. It is now read-only.

Add example of using ClickHouse #514

Open
wants to merge 2 commits into
base: main
Choose a base branch
from
Open

Add example of using ClickHouse #514

Changes from all commits
Commits
Show all changes
2 commits
Select commit Hold shift + click to select a range
7cd01b1
Add example of using ClickHouse
alexey-milovidov Oct 25, 2021
cb95435
Update README.md
alexey-milovidov Oct 25, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
11 changes: 11 additions & 0 deletions README.md
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -171,6 +171,17 @@ Invoke-WebRequest 'https://storage.googleapis.com/covid19-open-data/v3/latest/ep
where key -eq 'AU' | select date,cumulative_confirmed,cumulative_deceased,cumulative_recovered
```

### ClickHouse
You can load data into ClickHouse with the following query:
```sql
CREATE TABLE covid ENGINE = MergeTree ORDER BY (location_key, date)
AS SELECT * FROM url('https://storage.googleapis.com/covid19-open-data/v3/epidemiology.csv', CSVWithNames,
'date Date, location_key LowCardinality(String), new_confirmed Int32, new_deceased Int32, new_recovered Int32, new_tested Int32, cumulative_confirmed Int32, cumulative_deceased Int32, cumulative_recovered Int32, cumulative_tested Int32')
```
You can also process it directly with `clickhouse-local`:
```bash
clickhouse-local --input-format CSVWithNames --structure 'date Date, location_key String, new_confirmed Int32, new_deceased Int32, new_recovered Int32, new_tested Int32, cumulative_confirmed Int32, cumulative_deceased Int32, cumulative_recovered Int32, cumulative_tested Int32' --query "SELECT * FROM table" < epidemiology.csv
```


## Understand the data
Expand Down