Commands for Linux Terminal vs SQL Guide

A Complete Set of Linux commands in your pocket, with Markdown-formatted command references for quick lookup and offline use. Easily search commands and learn how to use them — anytime, anywhere. Bonus: monitor your servers in real time, track CPU, memory, disk, load and Docker containers over SSH, all from one app.

SQLGuide — Learn SQL, One Chapter at a Time SQLGuide is a modern, lightweight SQL learning app built around short chapters, interactive quizzes, and a practical reference library. It is designed for beginners who want to learn core SQL concepts clearly and build confidence with real query patterns. Learn by doing SQLGuide combines guided reading with quick practice so you can move from understanding → recall → application: - Read a chapter with focused explanations and examples - Practice with multiple quiz formats - Keep a reference library for fast lookups - Bookmark what matters and come back later Guide (SQL Basics) Progress through a structured curriculum that starts from fundamentals and builds up step by step: - Queries: SELECT, DISTINCT, LIMIT - Filtering: WHERE, AND/OR, IN, BETWEEN, LIKE - Sorting and grouping: ORDER BY, GROUP BY, HAVING - Aggregation: COUNT, SUM, AVG, MIN, MAX - Joins: INNER/LEFT/RIGHT, practical join patterns - Data shaping: CASE, COALESCE, NULL handling - Subqueries, CTEs, UNION - Basic DDL/DML concepts: CREATE TABLE, INSERT, UPDATE, DELETE (concepts and patterns) Quiz (with explanations) Practice with short, focused prompts that reinforce both syntax and reasoning: - Clear explanations after each question to help you learn from mistakes - SQL snippets and realistic scenarios that mirror everyday query work - Smooth “continue” flow to keep you moving without friction - Progress tracking that shows what you have mastered and what is next Reference (quick SQL lookup) A curated reference list for frequently used SQL topics, with concise notes and examples to reduce context switching while you learn. Bookmarks and progress - Bookmark chapters and reference topics - Track course progress and quiz completion - Earn badges as you complete milestones Who this is for - Students learning SQL fundamentals - Developers refreshing core SQL skills - Analysts practicing queries and concepts - Anyone preparing for SQL interviews or assessments Privacy and access No account required. No login. No external sign-in at all. Everything is free. Download and get all content immediately.