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Database scaling & optimization

Indexing, connection pooling, read replicas, query tuning, and throughput-aware SQL.

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Database scaling & optimization medium

How to Eager Load with JOIN to Reduce N+1 Queries in Python

Demonstrates eager loading with a SQL JOIN to reduce N+1 query patterns down to a single database call when fetching related data.

eager-loading n-plus-1 join
Python 
import sqlite3


def eager_load_join_reduce(mock_db_path=":memory:"):
    """Demonstrate eager loading where joins reduce query count from N+1 to 1."""
    conn = sqlite3.connect(mock_db_path)
    cursor = conn.cursor()
    cursor.executescript(
        """
        CREATE TABLE authors (id INTEGER PRIMARY KEY, name TE…
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