Metric aggregations (avg, sum, min, max) in Elasticsearch - Cheat Sheet & Quick Revision

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beginner

What is the purpose of metric aggregations in Elasticsearch?

Metric aggregations calculate numeric summaries like average, sum, minimum, and maximum values from your data.

beginner

How do you calculate the average value of a field using Elasticsearch aggregations?

Use the avg aggregation with the field name specified, for example:<br>

{ "aggs": { "average_price": { "avg": { "field": "price" } } } }

beginner

What is the difference between sum and avg aggregations?

sum adds all values of a field together, while avg calculates the average value by dividing the sum by the number of values.

beginner

How do you find the minimum and maximum values of a field in Elasticsearch?

Use the min and max aggregations with the field name, for example:<br>

{ "aggs": { "min_price": { "min": { "field": "price" } }, "max_price": { "max": { "field": "price" } } } }

intermediate

Can you combine multiple metric aggregations in one Elasticsearch query?

Yes, you can include multiple metric aggregations inside the aggs object to get several summaries in one query.

Which aggregation calculates the average value of a numeric field in Elasticsearch?

A sum

B min

C avg

D max

The avg aggregation calculates the average value of a numeric field.

What does the sum aggregation do?

A Finds the smallest value

B Finds the largest value

C Calculates the average

D Adds all values together

The sum aggregation adds all numeric values of a field.

How do you specify the field to aggregate in Elasticsearch metric aggregations?

A Using the <code>field</code> parameter

B Using the <code>index</code> parameter

C Using the <code>type</code> parameter

D Using the <code>value</code> parameter

The field parameter tells Elasticsearch which field to use for aggregation.

Which aggregation would you use to find the highest value in a field?

A avg

B max

C min

D sum

The max aggregation finds the highest value in a numeric field.

Can you run multiple metric aggregations in a single Elasticsearch query?

A Yes, by nesting them inside <code>aggs</code>

B Only if they are the same type

C No, only one aggregation per query

D Only if they use different fields

Multiple metric aggregations can be combined inside the aggs object in one query.

Explain how to use Elasticsearch metric aggregations to find average, sum, minimum, and maximum values of a numeric field.

Think about how you specify the field and how you combine multiple aggregations.

Describe the difference between the sum and average metric aggregations in Elasticsearch.

Consider what each aggregation calculates from the data.