sort.rst

sort

Table of contents

• Description
• Syntax
• Example 1: Sort by one field
• Example 2: Sort by one field return all the result
• Example 3: Sort by one field in descending order
• Example 4: Sort by multiple field
• Example 4: Sort by field include null value

Description

Using sort command to sorts all the search result by the specified fields.

Syntax

sort <[+|-] sort-field>...

• [+|-]: optional. The plus [+] stands for ascending order and NULL/MISSING first and a minus [-] stands for descending order and NULL/MISSING last. Default: ascending order and NULL/MISSING first.
• sort-field: mandatory. The field used to sort.

Example 1: Sort by one field

The example show sort all the document with age field in ascending order.

PPL query:

od> source=accounts | sort age | fields account_number, age;
fetched rows / total rows = 4/4
+------------------+-------+
| account_number   | age   |
|------------------+-------|
| 13               | 28    |
| 1                | 32    |
| 18               | 33    |
| 6                | 36    |
+------------------+-------+

Example 2: Sort by one field return all the result

The example show sort all the document with age field in ascending order.

PPL query:

od> source=accounts | sort age | fields account_number, age;
fetched rows / total rows = 4/4
+------------------+-------+
| account_number   | age   |
|------------------+-------|
| 13               | 28    |
| 1                | 32    |
| 18               | 33    |
| 6                | 36    |
+------------------+-------+

Example 3: Sort by one field in descending order

The example show sort all the document with age field in descending order.

PPL query:

od> source=accounts | sort - age | fields account_number, age;
fetched rows / total rows = 4/4
+------------------+-------+
| account_number   | age   |
|------------------+-------|
| 6                | 36    |
| 18               | 33    |
| 1                | 32    |
| 13               | 28    |
+------------------+-------+

Example 4: Sort by multiple field

The example show sort all the document with gender field in ascending order and age field in descending.

PPL query:

od> source=accounts | sort + gender, - age | fields account_number, gender, age;
fetched rows / total rows = 4/4
+------------------+----------+-------+
| account_number   | gender   | age   |
|------------------+----------+-------|
| 13               | F        | 28    |
| 6                | M        | 36    |
| 18               | M        | 33    |
| 1                | M        | 32    |
+------------------+----------+-------+

Example 4: Sort by field include null value

The example show sort employer field by default option (ascending order and null first), the result show that null value is in the first row.

PPL query:

od> source=accounts | sort employer | fields employer;
fetched rows / total rows = 4/4
+------------+
| employer   |
|------------|
| null       |
| Netagy     |
| Pyrami     |
| Quility    |
+------------+