Find and count unique values
These examples use NOAA water sample data.
The following examples identify and count unique locations that data was collected from.
Find unique values
This query:
- Uses
group()to ungroup data and return results in a single table. Uses
keep()andunique()to return unique values in the specified column.from(bucket: "noaa") |> group() |> keep(columns: ["location"]) |> unique(column: "location")
Example results
| location |
|---|
| coyote_creek |
| santa_monica |
Count unique values
This query:
- Uses
group()to ungroup data and return results in a single table. Uses
keep(),unique(), and thencount()to count the number of unique values.from(bucket: "noaa") |> group() |> unique(column: "location") |> count(column: "location")
Example results
| location |
|---|
| 2 |
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