Django complex partitioning & ordering for tree Table

I’m using Django with PostgreSQL as my Backend-Stack for an application of which the main feature is a complex, multilevel table displaying annotated time-series-data for different products. So …

declare variable with pd.read_sql_query

Can someone explain why do I get an error when executing the following simple query with pandas: import pyodbc import pandas as pd connstr = ‘Driver={SQL Server}; Server=sr1; Database=db’ conn = …

group by date and two different times in the same date in Sql

i want to select from my database the data that is BETWEEN to date and two different times in the same date but when I use the Sum in one of the variants it give me a wrong result i thnik that the …

python list in tuple compare

I have a list and a tuple ( from sqlite query) and what to check if the items in list are not in the db tuple. If not add to newJobs list links = [“example.com”, “mysite.com”] …

How to refactor my python to use a SQL Prepared statement?

Code to accept input from the user and gives a User for a given username. Now it is accepting the input directly into the SQL query but I would like to use it with prepared Statements, how could I do …

Primary key constraint gets removed when creating postgres table from pandas dataframe

I am trying to create few tables in Postgres from pandas dataframe but I am kept getting this error. psycopg2.errors.InvalidForeignKey: there is no unique constraint matching given keys for …

How to properly store a file location to a postgresql table?

I am very new to postgresql. I don’t plan to study it fully in-depth right now as I have other priority topics to finish. But now I need to know some basics of postgresql for the perfect completion of …

Storing struct_time in SQL

Some code I am writing in Python takes in a date from a server in the struct_time format (with the 9 args). How can I store this date in an SQL database, and be able to read back this date as a …

SQLAlchemy: Filter the Objects From Relationship When Accessed

Query Statement: Get Children that have their Names start with ‘A’. Link Them With their Parents. Schema: I Have a One-to-Many Relationship. Parent(id, Name, children(rel->child)) -> Child(id, …

Python/Excel/SQL column dates to exploded rows

I have an Excel spreadsheet table like this where it shows how many units were sold each week for 2019 and 2020 (columns) and I am trying to put it into an access database formatted like the second …