Cheat Sheets
Quick-reference cards with essential commands, syntax, and tips. Copy any snippet with a single click.
SQL
Comprehensive SQL reference — DDL, DML, joins, window functions, CTEs, string/date functions, and performance tips.
Python
Complete Python reference — data structures, OOP, comprehensions, decorators, itertools, regex, and more.
PySpark
Complete PySpark DataFrame API — reads, transforms, joins, aggregations, window functions, UDFs, and performance tuning.
Snowflake
Complete Snowflake reference — warehouses, stages, streams, tasks, time travel, semi-structured data, RBAC, and Snowpark.
Command Line
Complete terminal reference — navigation, text processing, permissions, ssh, compression, cron, Docker, and system admin.
GitHub & Git
Complete Git & GitHub reference — branching, merging, rebasing, cherry-pick, tags, hooks, GitHub Actions, and PR workflow.
Gen AI & Copilot
Complete AI coding reference — prompt engineering, Copilot shortcuts, LLM APIs, RAG patterns, and AI best practices.