I have a table like this: ID OtherID Date 1 z 2022-09-19 1 b 2021-04-05 2 e 2022-04-05 3 t 2022-07-08 3 z 2021-03-02 I want a table like this: ID OtherID Date 1 z 2022-09-19 2 e 2022-04-05 3…
I'm trying to select the rows for MEDs (type) and the related child rows for ORAL (type) where each MED type has multiple ORAL types from the following table. ID PARENT_ID TYPE 1 NULL MED 2 1 ORAL 3 NULL…
I'm trying to add a generated column in existing table. I've a transaction table, in that table I've one column named as dateTime(containing date and time in timestamp format). I want to create a virtual column named as transactionDate which…
so i have an Django app that i currently working on, this app will do euclidean distance for 2000+ data. Im using this data to make recommendation system using Content Based Filtering. Content Based works like if you clicked an…
I have two tables: Company, Event. Company { id, name } Event { id, id_company, date, name } It's one to many relation. I want to have results of companies (every company only once) with the latest event. I'm using…
I have an existing table like this: CREATE TABLE public.data ( id integer, name text, sell_value real) ); and I define a domain as: CREATE DOMAIN dataDomain AS TEXT CHECK(name = ANY ('{joe, john, jack}'::text[])); How can I apply the…
Suppose I have the following table in SQL: id year value 1 2022 10 1 2020 5 2 2019 10 2 2021 4 3 2018 2 3 2017 10 And for each id, I want the last value based on…
How to check if the email_id/ username already exists in the database in django? I want to check the existence of the email/username in the views rather than in serializer. Following is the code: @api_view(['POST']) def registerUser(request): f_name = request.data.get('f_name')…
Suppose I have a query: SELECT max(ended_at) - min(started_at) FROM test_run How would I return the result as a ISO8601 duration? i.e. If time different is 5 seconds, I would I expect the response to be PT5S.
I'm trying to figure out a way to make the rank() window function "skip" in its counting some rows with null values in a specific column. Pretty much, what I want is to count how many paid transactions there are,…