Open tiniacoleyba opened 1 month ago
Hey, Thank you for this! Always glad to hear the value readers get from my posts as well as discovering it serendipitously.
At the time of writing the post I also found it a little weird, today I use it more often so I'm actually more inclined to use it within the same query. Also due to it being faster than wrapping the whole query in a CTE to only run something afterwards (in terms of writing, not necessarily performance).
Now that I also use BigQuery more it's pretty crazy that you can use the idea of window function after group by and you can then use it within QUALIFY
. I think that's an overkill but shows to what extent it can be leveraged.
Nice post about the relationship between SQL
GROUP BY
and window functions. I liked your explanation but agree that most people, including myself (before this post), won't understand the syntax, and it is probably more convenient to use CTEs. I encountered this convoluted syntax in a work repository of analytics queries and couldn't make sense of it at first. That's how I arrived at your post. It ranks very well on search engines. Good work!Sidenote: the Utterances tool scared me away from commenting at first. I don't want to let it access my GH account so I tried opening a issue instead to see if it is linked to the comments in your post.