Learn SQL vs まいにち脳活｜物忘れ対策の脳トレ・計算・記憶力

Let Us SQL is a learn-anywhere app that takes you from zero to confident with SQL, the language behind every database. No prior coding experience needed — you'll learn by doing, one bite-sized lesson at a time, until reading and writing SQL feels like second nature. Best of all, everything is taught using PostgreSQL, one of the most widely used databases in the real world, so the skills you build here are skills you'll actually use. 85 LESSONS. 11 CHAPTERS. A CLEAR PATH FROM BEGINNER TO JOB-READY. We've laid out a complete, carefully sequenced curriculum: 11 chapters and 85 lessons in total. You'll start with your very first SELECT, then move on to filtering with WHERE, sorting with ORDER BY, working with text, date, and number functions, aggregating data with GROUP BY and HAVING, writing subqueries, combining tables with JOIN, handling transactions, and finally creating tables with primary and foreign keys. Each step builds naturally on the last — and a set of real-world practice exercises at the end ties everything together. LEARN BY DOING, NOT JUST READING Every lesson pairs plain-English explanations with real query examples and hands-on fill-in-the-blank exercises. The sample data is drawn from everyday scenarios — a zoo, restaurant reservations, an online store — so you always know why a query matters, not just how to type it. Answer a question and you'll see instantly whether you got it right, so nothing slips through the cracks. BUILD A HABIT THAT STICKS A progress bar shows how far you've come, and a daily streak counter keeps you coming back. Your progress is saved right on your device, so you can always pick up exactly where you left off. MADE FOR YOU IF YOU'RE… • Brand new to SQL and looking for a friendly place to start • Taking your first steps toward data analysis or engineering • Looking to learn in the small pockets of time throughout your day LITTLE THINGS YOU'LL LOVE • No sign-up required — just open it and start learning • Works offline, wherever you are • An AI helper on hand whenever a question comes up • Clean syntax highlighting and a simple, distraction-free design Start today and learn at your own pace. Let Us SQL makes mastering data feel easy.

「最近、人の名前がすぐ出てこない」 そんな方のための、毎日つづける脳トレアプリです。 まいにち脳活は、1日3種目・すき間時間の脳トレーニング。 広告は一切ありません。集中を邪魔されずに取り組めます。 ■6つの種目 ・計算 — 60秒で何問解けるか。計算力をきたえる ・数字タッチ — 1から25まで順にタッチ。注意力をきたえる ・記憶 — 光った順番を覚える。記憶力をきたえる ・色と文字 — 文字ではなく色を答える。判断力をきたえる ・違い探し — 1つだけ違う字を探す。観察力をきたえる ・熟語 — 二字熟語を完成させる。言語力をきたえる ■続けられる仕組み ・「きょうの脳活」が毎日3種目を自動で提案 ・連続日数と自己ベストを記録。昨日の自分と競えます ・大きな文字と大きなボタン。説明書なしで使えます ■安心してお使いいただけます ・広告は一切表示しません ・成績や記録は端末の中だけに保存します ・アカウント登録・ログインも不要です ■料金 「計算」「数字タッチ」は無料のままずっと使えます。 残り4種目は買い切り(1回のみ)で開放。月額課金はありません。 1日5分、頭の準備運動から始めましょう。