【OVERVIEW】
By inputting standardSQL including BigQuery join clause, generate SQL to check the change in the number of records before and after join, and use the SQL for verification to detect unintended increase/decrease of records in join clause. I can. You can also visualize the SQL structure by analyzing the JOIN clause relationships.
【USE CASE】
When creating a mart SQL that connects sales and product data, etc., you can check from the record increase/decrease whether there is a non-normalization method. Examples of incorrect denormalization methods include the following possibilities:
・join key is wrong
・The id of the products table is not PK
・Join key is missing (sales.product_id contains NULL)
Extore is a team of professionals who are passionate about creating extensions for web browsers. This devotion also gives us opportunity to appreciate work of other people. We get inspired by useful, open source extensions made by developers all over the world. Our strong belief is that one should share helpful add-ons with others. That’s why we’d like to present you our ever-growing list of favourite extensions that have inspired us. Moreover, as you probably have already learned, sometimes struggling for the best brings an end to the good. Talking about add-ons it often turns out that an upgrade is worse then previous version. Also it can become really tricky to get back to the beloved version of your favourite extension. That’s why we’re going to make not only the latest, but all versions of our favourite (and we hope yours too) add-ons available for download. No more compromises, just stick to the version you really like!
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