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Get value for every date in table with date ranges

I’m working with table, its structure looks like this: from_date DATE %Y-%m-%d to_date DATE %Y-%m-%d person VARCHAR tax INT Table shows that in period between date_from and date_to for such person there was such tax The whole point is that these periods can intersect and activities can sum. Roughly spea…

SQL GROUP BY IN CASE STATEMENT

i have one table i would like to classify the apple as below i try to add code as below, but its not like what I expected I try this code also, but got error Answer You want conditional aggregation here, which involves summing over the CASE expression:

Junction table in PostgreSQL

I have two tables I created a junction table called “recipes_ingredients” My first question is: is it correct how I created the “recipes_ingredients” table? Do I need the “id” or I can just have the two foreign keys “fk_recipe” and “fk_ingredient”? A…

Creating a cumulative sum column with_order in R

I’m working alongside a SQL tutorial using queryparser and tidyquery in R. This has been going well until I was asked to do: Tidyquery reported that it did not support OVER functions so I am trying to replicate the OVER (PARTITION BY…) function with dplyr. This led me to with_order(order_by =&#823…