Efficient Data Operations and Advanced Querying in Django ORM
Single Table Operations
Creating Records
Method 1: Using save() on an instance
from app.models import Product
new_product = Product(name='Laptop', cost=1500, category='Electronics')
new_product.save()
Method 2: Using the create() manager method (Recommended)
Product.objects.create(name='Tablet', cost=800, category='Electronics')
Method 3: Ba ...
Posted on Thu, 29 Oct 2026 16:03:34 +0000 by plautzer
Mastering SQL Data Retrieval, Constraints, and Relational Joins
Sorting Query Results
The ORDER BY clause controls how rows are returned. It does not alter the stored data, only the presentation.
SELECT column_list FROM table_name
WHERE condition
ORDER BY column1 [ASC|DESC], column2 [ASC|DESC];
Single‑column ordering
Sort employees by age in descending order:
SELECT name, age FROM employees ORDER BY age DE ...
Posted on Sun, 10 May 2026 02:14:43 +0000 by deffe