ppl-top-command.md

PPL top command

Description

Using top command to find the most common tuple of values of all fields in the field list.

Syntax

top [N] <field-list> [by-clause] top_approx [N] <field-list> [by-clause]

• N: number of results to return. Default: 10
• field-list: mandatory. comma-delimited list of field names.
• by-clause: optional. one or more fields to group the results by.
• top_approx: approximate count of the (n) top fields by using estimated cardinality by HyperLogLog++ algorithm.

Example 1: Find the most common values in a field

The example finds most common gender of all the accounts.

PPL query:

os> source=accounts | top gender;
os> source=accounts | top_approx gender;
fetched rows / total rows = 2/2
+----------+
| gender   |
|----------|
| M        |
| F        |
+----------+

Example 2: Find the most common values in a field

The example finds most common gender of all the accounts.

PPL query:

os> source=accounts | top_approx 1 gender;
fetched rows / total rows = 1/1
+----------+
| gender   |
|----------|
| M        |
+----------+

Example 2: Find the most common values organized by gender

The example finds most common age of all the accounts group by gender.

PPL query:

os> source=accounts | top 1 age by gender;
os> source=accounts | top_approx 1 age by gender;
fetched rows / total rows = 2/2
+----------+-------+
| gender   | age   |
|----------+-------|
| F        | 28    |
| M        | 32    |
+----------+-------+