I was wondering what would be the easiest way to update a column by +1? I will be updating a post count of a category based on when users submits a new post. Thanks.
Tag: aggregate-functions
SQL: difference between PARTITION BY and GROUP BY
I’ve been using GROUP BY for all types of aggregate queries over the years. Recently, I’ve been reverse-engineering some code that uses PARTITION BY to perform aggregations. In reading through all the documentation I can find about PARTITION BY, it sounds a lot like GROUP BY, maybe with a little extra functionality added in. Are they two versions of the
MySQL “Group By” and “Order By”
I want to be able to select a bunch of rows from a table of e-mails and group them by the from sender. My query looks like this: The query almost works as I want it — it selects records grouped by e-mail. The problem is that the subject and timestamp don’t correspond to the most recent record for a