Learning SQL vs Job Interview Prep & Coding

Learn SQL from beginner to advanced with a practical and structured approach. Aprendendo SQL is designed to help you truly understand databases through hands-on practice, real challenges, and step-by-step lessons. Whether you are starting from scratch or improving your skills, the app guides you with clear explanations and interactive content. What you will learn: Master the core SQL commands such as SELECT, INSERT, UPDATE, and DELETE Work with filters and data organization using WHERE, GROUP BY, HAVING, and ORDER BY Understand table relationships with INNER JOIN, LEFT JOIN, and RIGHT JOIN Explore advanced concepts including Views, Stored Procedures, Triggers, and Indexes Practice with real exercises that reinforce learning and build confidence App features: Interactive lessons with clear explanations Practical SQL challenges to test your knowledge Progressive learning from beginner to advanced Self-paced study, learn anytime Designed for students, developers, and professionals Build real SQL skills that you can apply in projects and jobs Start learning SQL today and take your database skills to the next level.

Coding interviews are not a memory test. They are a test of whether you can explain why one correct answer beats another correct answer. Interview Prep is built around exactly that moment. Before you agree to anything, the app shows you what it means. One real question — Two Sum — and two solutions that both work: check every pair, or remember what you have already seen. They run side by side on the same 64 numbers, with every comparison and every lookup counted as it happens. Same answer. Sixteen times the work. That is the difference an interviewer is listening for, and now you have watched it. WHAT'S INSIDE • A question every day — read it, think, reveal the answer, and keep your streak alive. Free, every day, no account needed to start. • 90 short courses in three tracks: data structures and algorithms, SQL for interviews, and competitive programming. Arrays and hashing, two pointers and sliding windows, binary search, stacks and queues, trees and graphs, dynamic programming, SQL joins, window functions and indexes, and system design basics. • 60 coding problems you solve in Python in a built-in editor: write your solution, run it and get it checked. 20 easy, 20 medium, 20 hard. • 20 guided pattern projects: build two pointers, hash maps, sliding window, BFS, tree DFS, heaps and more, one step at a time. • An AI mentor you can ask anything, in plain language, whenever a concept refuses to click. • Mini quizzes and flashcard review to turn "I read it" into "I can recall it". • Save any question, keep notes on any lesson, and browse cheatsheets and worked examples. • Streaks and XP that reward showing up daily, which is the only study schedule that survives a real job. HOW IT IS DIFFERENT • Complexity is shown, not asserted. Where the app says an approach costs more, the number comes from running it. • Built for the commute, the queue and the ten minutes before a stand-up. Short sessions, one question at a time. • Available in 22 languages. FREE AND PRO Get started for free: the daily question is free every day, the first course of each track is free in full, two coding problems and one guided project are free, and the AI mentor answers three questions a day at no cost. Interview Prep Pro unlocks all 90 courses, all 60 coding problems, all 20 guided projects, course certificates and unlimited AI mentor answers. It is a subscription you can manage or cancel at any time from your device's account settings; it renews automatically unless cancelled at least 24 hours before the period ends. We take your privacy seriously. Read our full privacy policy at https://coddykit.com/terms/privacy-policy before subscribing, and review our Terms of Use below. By downloading this app you agree to both. Your next interview is going to ask you why. Come in with the answer. Terms of Use https://www.apple.com/legal/internet-services/itunes/dev/stdeula/ Privacy Policy https://coddykit.com/terms/privacy-policy