backend

What are some useful SQL statements that should be known by all developers who may touch the Back end side of the project? ( Update: just like in algorithm, we know there are sorting problems, shuffling problems, and we know some solutions to them. This question is aiming at the same thing). For example, one I can think of are: Get a list of Classes that are not registered by any students. (Outer join and check whether the match is NULL, or by Get from Classes table, all ClassIDs which are NOT IN (a subquery to get all ClassIDs from the Registrations table)) Are there some SQL statements that

Closed . This question needs details or clarity. It is not currently accepting answers. Learn more . Want to improve this question? Add details and clarify the problem by editing this post . How a newbie differentiate between this? How one can know he/she is working is back-end system or front-end system? "Front-end" typically means the parts of the project a user interacts with--such as the graphical user interface or command line. It's a vague term, there isn't an exact definition. "Back-end" means the parts that do the work, but the user is unaware of or cannot see. Databases, services, etc

Can we start a dynamic backend programatically? mean while when a backend is starting how can i handle the request by falling back on the application(i mean app.appspot.com). When i stop a backend manually in admin console, and send a request to it, its not starting "dynamically" Dynamic backends come into existence when they receive a request, and are turned down when idle; they are ideal for work that is intermittent or driven by user activity. Resident backends run continuously, allowing you to rely on the state of their memory over time and perform complex initialization. http://code

so I already finished all of the actual app for this. I just need to setup the backend. I figured Firebase was the best solution since Parse is no longer a thing. What I wanted was: Users with profiles - These profiles can be viewed by added friends but only edited (written) to by the actual profile owner. So I read through the Firebase Docs and still cannot really figure out how to do this. They only have 1 Swift application example that does not do anything similar and the one Obj C twitter one, will not even build. All of their docs still have println for Swift which just makes me think it

I have an Erlang/OTP application which does some business logic. It is written in Erlang mostly for fault-tolerance, because I can easily restart one of the crashed components of the system (high uptime is the most important requirement). Each of its components does some sort of specific "parallel" computations. As a result of one working cycle the application produces a list of values. Let's call this Erlang/OTP application a "back-end". This Erlang/OTP application would also use a PostgreSQL server to store the results in the persistent storage and to store additional meta-information needed

I need to implement a back-end for verifying Apple's in-app purchase receipt_data , for an in-app purchase of in-app points (i.e. not a subscription and not an item that needs to be "remembered" and re-verified in every application launch). I am not proficient in iOS. I just need to develop the back-end so that it can be integrated with a client's mobile app. I found tutorials and sample code for doing the verification, but I would very much like to have an actual receipt_data to test with. The best thing would be to have two receipt_data s: one sandbox and one production. I understand that

As it currently stands, this question is not a good fit for our Q&A format. We expect answers to be supported by facts, references, or expertise, but this question will likely solicit debate, arguments, polling, or extended discussion. If you feel that this question can be improved and possibly reopened, visit the help center for guidance. for my mobile application, I am searching for a possibility to easy link all instances of this running application together (on server), but I have no experience in developing a backend server software. Thus, a ready to use "backend as a service" solution

I would like to use AngularJS in my next project. The application with Python backend and html5, Angular frontend. I am going to use MVC framework on backend and I am little bit confused. Do I have to use routing on backend and also frontend? Because I always used backend routing and routing on frontend is really new idea for me. Is client side routing better? And when I choose to use frontend routing, there will be no routes on backend? All request will be send to one url? You can use client-side routing and let the backend return static files and JSON data. The routing in Angular basically