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format_percentage

Call or Deploy format_percentage ?

✅ You can call this format_percentage bigfunction directly from your Google Cloud Project (no install required).

  • This format_percentage function is deployed in bigfunctions GCP project in 39 datasets for all of the 39 BigQuery regions. You need to use the dataset in the same region as your datasets (otherwise you may have a function not found error).
  • Function is public, so it can be called by anyone. Just copy / paste examples below in your BigQuery console. It just works!
  • You may prefer to deploy the BigFunction in your own project if you want to build and manage your own catalog of functions. This is particularly useful if you want to create private functions (for example calling your internal APIs). Discover the framework

Public BigFunctions Datasets:

Region Dataset
eu bigfunctions.eu
us bigfunctions.us
europe-west1 bigfunctions.europe_west1
asia-east1 bigfunctions.asia_east1
... ...

Description

Signature

format_percentage(first_number, second_number, nb_decimals)

Description

Return first_number / second_number as a formatted percentage in a user-friendly format. You can use this function to handle a safe divide of the two numbers as well as your desired level of rounding.

Examples

select bigfunctions.eu.format_percentage(1, 3, 2)
select bigfunctions.us.format_percentage(1, 3, 2)
select bigfunctions.europe_west1.format_percentage(1, 3, 2)
+----------------------+
| formatted_percentage |
+----------------------+
| 33.33 %              |
+----------------------+

Need help using format_percentage?

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For professional suppport, don't hesitate to chat with us.

Found a bug using format_percentage?

If the function does not work as expected, please

  • report a bug so that it can be improved.
  • or open the discussion with the community on Slack.

For professional suppport, don't hesitate to chat with us.

Use cases

You're an analyst for an e-commerce company and you need to calculate and display the conversion rate for different marketing campaigns. You have a table with the number of clicks and the number of resulting purchases for each campaign.

WITH campaign_data AS (
    SELECT
        'Campaign A' AS campaign_name,
        1000 AS clicks,
        50 AS purchases
    UNION ALL
    SELECT
        'Campaign B' AS campaign_name,
        500 AS clicks,
        20 AS purchases
    UNION ALL
    SELECT
        'Campaign C' AS campaign_name,
        2000 AS clicks,
        150 AS purchases

)

SELECT
    campaign_name,
    bigfunctions.us.format_percentage(purchases, clicks, 2) AS conversion_rate
FROM campaign_data;

This query uses the format_percentage function to calculate the conversion rate (purchases / clicks) for each campaign and format it as a percentage with two decimal places. The result would be a table like this:

+---------------+----------------+
| campaign_name | conversion_rate |
+---------------+----------------+
| Campaign A    | 5.00 %         |
| Campaign B    | 4.00 %         |
| Campaign C    | 7.50 %         |
+---------------+----------------+

This makes it easy to compare the effectiveness of different campaigns in a human-readable format. You could also use this function to calculate and display other percentages, such as sales growth rates, discount percentages, or return rates.

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