Last active
February 17, 2021 04:15
-
-
Save haleemur/37629d28490957268883e818f64d52c8 to your computer and use it in GitHub Desktop.
using model.columns in dbt
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
| the view definition | |
| ```sql | |
| -- target_view.sql | |
| {%- set frame = 'OVER (PARTITION BY transaction_id ORDER BY id DESC)' -%} | |
| SELECT DISTINCT | |
| transaction_id | |
| {%- for f in model['columns'] -%} | |
| {% if f != 'transaction_id' %} | |
| , FIRST_VALUE({{ f }}) {{ frame }} AS {{ f }} | |
| {%- endif -%} | |
| {% endfor %} | |
| , ROUND(DATE_DIFF( | |
| 'day' | |
| , FIRST_VALUE(purchase_date) {{ frame }} | |
| , FIRST_VALUE(expires_date) {{ frame }} | |
| ) / 30.4) AS purchase_duration_months | |
| FROM {{ ref('src_purchases_table') }} | |
| WHERE deleted_at IS NOT NULL | |
| ``` | |
| the model definition in the schema.yml file | |
| ```yaml | |
| # schema.yml | |
| models: | |
| - name: target_view | |
| columns: | |
| - name: column1 | |
| - name: transaction_id | |
| - name: id | |
| - name: user_id | |
| - name: purchase_date | |
| - name: expires_date | |
| ``` | |
| the compiled output | |
| ```sql | |
| -- target/compiled/project/target_view.sql | |
| SELECT DISTINCT | |
| transaction_id | |
| , FIRST_VALUE(column1) OVER (PARTITION BY transaction_id ORDER BY id DESC) column1 | |
| , FIRST_VALUE(id) OVER (PARTITION BY transaction_id ORDER BY id DESC) id | |
| , FIRST_VALUE(user_id) OVER (PARTITION BY transaction_id ORDER BY id DESC) user_id | |
| , ROUND(DATE_DIFF( | |
| 'day' | |
| , FIRST_VALUE(purchase_date) OVER (PARTITION BY transaction_id ORDER BY id DESC) | |
| , FIRST_VALUE(expires_date) OVER (PARTITION BY transaction_id ORDER BY id DESC) | |
| ) / 30.4) AS purchase_duration_months | |
| FROM source.src_purchases_table | |
| ``` |
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment