DB RelationalAlgebra vs App Screenshots

A native iPad and iPhone app that converts a SQL query typed, pasted, or imported from a .sql file into relational algebra, tuple relational calculus and domain relational calculus. Each notation gets a step by step derivation, a final oneline formula, and an interactive diagram an operator tree for the algebra, a quantifier scope tree for the calculus and a fourth view stacks all three against the same query. Whatever SQL asks for that a notation cannot express exactly is reported rather than quietly approximated.

Turn your screenshots into store-ready screenshots and auto localize in 30 languages! App Screenshots Studio drops your screenshots into device frames, then helps you build them into a clean, polished set ready for the App Store. Reach the world Build your screenshots once, then translate your captions into up to 30 languages in a tap. Each language becomes its own copy of your project, kept together in one folder, so you can check the wording, swap in localized screenshots, and export each set on its own. Update the translations after you edit the original, and tight captions are flagged so you know which ones to review. Make it your own •Captions in your choice of fonts, with full control over size, weight, alignment, and spacing •Solid colors, gradients, or your own images as backgrounds •Adjustable shadows with real depth and softness •Feature callouts •And more! Work the way you want Save your favorite mockups to reuse across projects. Keep every project, and every translated copy, organized and easy to find. Everything lives on your device. An optional account keeps your projects backed up and synced to any place this app is available. By downloading this app, you agree to Apple’s Standard License Agreement: https://www.apple.com/legal/internet-services/itunes/dev/stdeula/