string-aggregation

How can I aggregate rows together according to a selected column using a pandas DataFrame Question: this is my first question in Stack Overflow. I will water down the problem that I have at the moment. I am trying to clean a dataset for a User-based collaborative filtering recommendendation system. Here’s an oversimplication of the …

SQL how to prevent duplicates in STRING_AGG when joining multiple tables Question: Here’s the relational model for the database that I’m going to talk about (a show can have multiple actors and multiple genres): Relational model (sorry, don’t have enough reputation to insert an image) What I would like to achieve is to get every …