Python Recipes Pro vs SQL Practice

An everyday Python reference, from strings and collections to threading and design patterns. Every example comes with an explanation, and most of them run. The construct is on the tip of your tongue, but the exact syntax slips away: • How do you sort a dictionary by value? • How do you serialize a class to JSON and read it back? • How do you start a thread and wait for the result? The app answers with a working example; all that is left is to fit it to your task. • 22 sections: basic types, arrays and collections, classes, files, serialization, functions and lambdas, exceptions, regular expressions, threading, databases, algorithms, design patterns. • Run in the app: the example actually runs and the output appears under the code. Needs an internet connection; the daily limit is 30 runs. • What changed in new versions: 8 sections from Python 3.0 to 3.13, with the old and the new code side by side. • Keyword and function reference: over 200 articles, browsable as a list or searchable by word. • SQL alongside: over 200 queries against a live practice database (JOIN, GROUP BY, subqueries, data types). Queries have their own daily limit. • Edit examples and add your own; they stay in the app and are always at hand. • Search looks inside the code itself, not just the titles: remember a fragment and you will find the example. • Everything except running works offline: examples, search, favorites. • Comfortable to read: light and dark themes, your own font and size, line numbers, and long lines wrap instead of spilling off the screen. Examples are drawn from professional sources and verified by running them. Built by a developer for developers. In active development since 2015.

Learn SQL in 15-minute daily sessions — on your phone, anywhere. SQL Practice turns idle moments into practical data skills. With interactive exercises, realistic datasets, and instant feedback, you’ll build SQL confidence from beginner fundamentals to interview-ready skills. Who it’s for: - Career changers entering tech - Professionals adding SQL to their toolkit - Students preparing for technical interviews - Anyone curious about data and databases Why it’s different: - Learn by doing: write and run real SQL queries - SQL Patterns (Pro): understand reusable approaches instead of memorizing answers - Database Bits (Pro): build intuition with short, visual lessons - Smarter feedback (Pro): see why your result differs from the expected output - Progressive curriculum: start with the fundamentals and advance at your own pace - Mobile-first design: practice whenever you have a few spare minutes When you get stuck: With Pro, SQL Practice helps you move forward without immediately giving away the answer. Use progressive hints, compare your results with the expected output, and explore SQL X-Ray explanations that break queries into understandable steps. What you’ll learn: - SELECT, WHERE, ORDER BY, and filtering - JOINs and relationships between tables - COUNT, SUM, AVG, GROUP BY, and HAVING - Subqueries and advanced query techniques - Reusable SQL patterns (Pro) - Core database concepts, indexes, and data design (Pro) Practice your way: - Guided SQL lessons - Easy, medium, and hard exercises - Quick drills - Short visual database lessons (Pro) - Daily practice challenges - Streaks, XP, achievements, and progress tracking - Hardcore mode: turn off the advanced SQL keyboard and solve the toughest challenges without assistance—the highest level of SQL practice. Free and Pro: Core SQL lessons, exercises, drills, streaks, and basic progress tracking are free. An optional auto-renewing Pro subscription unlocks SQL Patterns, Database Bits, progressive hints, detailed result comparisons, and SQL X-Ray step-by-step explanations. Available plans, billing periods, trial eligibility, and localized prices are shown before purchase. No purchase is required to use the core learning and practice features. Start your data journey today — no prior coding experience required, just 15 minutes of curiosity. Privacy Policy: https://martongreber.github.io/mvp/privacy.html Terms of Use: https://martongreber.github.io/mvp/terms.html