Update individual fields of a model instance without deleting related rows using Django's bulk update feature and retrieving corresponding `Item` instances from the Django database.

Understanding Row Fetching in MySQL for Select Statements: A Guide to Optimizing Performance

Selecting and Unlinking Data from Multiple Tables with Foreign Keys: A Step-by-Step Guide for Advanced Database Users

Understanding MySQL Errors and Group By with Having Clauses: The Ultimate Guide to Resolving Error 1111

Parsing MySQL `WHERE` Strings with Regex: A Comprehensive Guide

Categorizing Movie Renters Based on Frequency: A Step-by-Step SQL Solution

Extracting 4-Digit Numbers from a String Column Using Regular Expressions in SQL

Grouping By Day/Month/Year on a Subquery

Return Only Rows When Specific Value Doesn't Exist in Another Table

Understanding Delimited Columns in Databases: Best Practices for Handling Delimited Columns in MySQL and Beyond