SQL Recipes vs LinuxTool

200+ SQL queries with explanations, 120+ of them free. Tap Run and see the result table right in the app. An everyday SQL cheat sheet, from your first SELECT to window functions. • 39 sections, including filtering, sorting, calculated fields, functions, GROUP BY, window functions, subqueries, JOIN, UNION, INSERT and UPDATE, data types, tables, views. • Changes by standard: 7 sections from SQL-92 to SQL:2023, with before-and-after queries. • Keyword and function reference: over 180 articles. Browse, search, or tap a word in a query to open its article. • Dialects compared: MySQL, PostgreSQL, SQLite, SQL Server, Oracle, Firebird, Access. Where they differ, the dialect-specific variants are shown. • Practice database: the classic MySQL “world” sample (countries, cities, spoken languages); its tables are described in the app. • Run in the app: more than half of the queries execute against the practice database, and the result table appears directly below the query. Requires an internet connection. • Search covers the queries themselves, not just titles: type a fragment you remember and find the query. • Edit queries and rerun the runnable ones; one tap brings the original back. • Add your own queries; they are saved in the app. • Everything except running queries works offline. No account needed. Queries are curated from professional sources and checked before release: the code works and is easy to follow. FREE VERSION • 12 runs and 12 edits a day • Full keyword and function reference; tap a word in a query for up to 12 articles a day • Up to 5 queries of your own The full version unlocks every query, removes the limits on edits and on your own queries, and raises the daily run limit to 80. One-time purchase, no subscription. Built by a developer for developers. The CodePro project has been in active development since 2015.

LinuxTool is an offline command reference and learning companion for developers, system administrators, students, and anyone who works with a command line. It does not connect to servers or execute commands. Open the app whenever you need to understand Linux, Windows CMD, or PowerShell syntax quickly and confidently. 1,200+ OFFLINE COMMANDS Browse Linux, CMD, and PowerShell commands covering files, text processing, networking, system administration, containers, version control, package management, and other everyday workflows. The knowledge base is bundled with the app, so core reference content remains available without a network connection. FIND THE RIGHT COMMAND FAST Search command names, summaries, and categories. Switch between list and grid views, then narrow results by practical task. From ls, grep, find, and ssh to Docker, Git, and PowerShell essentials, the command you need is never far away. UNDERSTAND BEFORE YOU RUN Command pages include a concise purpose, syntax, practical examples, related commands, and safety notes where appropriate. Select and copy code blocks only after reviewing what each option does. ORGANIZED FAVORITES Keep favorites and recently viewed commands together. Filter them by All, Linux, CMD, or PowerShell for a cleaner cross-platform workflow. 10 QUESTIONS A DAY Choose a Shell platform and reinforce your memory by matching commands with their meanings. Favorite a command from a question, share useful content, restart a round, and track your score and perfect-score streak. CLEAR, FOCUSED DESIGN LinuxTool is designed for repeated reference: readable typography, predictable navigation, and a bright default appearance. Themes can be selected manually in Settings. Great for: • Learning Linux and Shell fundamentals • Command lookup during development and operations work • Comparing Windows and Linux command-line concepts • Reviewing SSH, Docker, Git, and administration tools • Interview preparation, coursework, and daily practice LinuxTool is a reference handbook, not a terminal emulator or remote connection client. Always review the scope and parameters of commands that may modify or delete data before running them.