Doing practise exam questions. Was just looking for some feedback on my attempt at this task. Do you think this caters for what it's asking for, is it missing anything?
Related
im a new student of computer science and i got this database modelling course,
on my last course my lecturer explain me about basic erd modelling such as relation,entities,chen and crowsfoot notation
and i got a task that tell me to make an erd about train booking with some spesific requirements, here's the requirement
requirements
and here's what i've made from what i know from my last course
my work
im stuck about the requirements, im very glad if someone can help/explain me about how to make an erd with that requirements, Thanks
I'm revising for uni using mock questions and I'm wondering where I could find materials or information to answer this question or if someone could walk me through it?
Thanks
Ever hear of the "2-Phase Commit" algorithm? That's how they do it. Incidentally, I met the guy who has the patent on "2-Phase Commit"; he's an old-timer like me :).
I am having trouble visualizing a Graph Database.
Visualizing an RDBMS is really very simple and I was able to understand from the first tutorial itself when I started learning it some 4-5 years ago.
But I am not able to understand Graph Databases.
I am also unable to get any good links on this topic, hence posting this question here.
Specifically, I am looking for the following:
Some really simple book/link on Graph Dbs
Atleast some knowledge on the implementation details of a Graph DB (I hope all Graph DBs would be having atleast a few basic things in common).
Thanks a lot in advance guys,
Protoge is your best bet to get started understanding ontologies.
IsaVis is a pretty common tool for visualizing you db.
Jena and Sesame are you best bets for implementations (both in java) but for prototyping python rocks and rdflib is the must use tool there.
There are plenty of others out there but those are my suggested entry vehicles. YMMV
Neo4j did a quite good job for me explaining the concept. Also starting with it to test is quite easy to do. You could start here:
http://neo4j.org/learn/
This question I found in my DBMS college question paper. I am confused whether it belongs to ER Diagram topic or something else. Please help.
It is related to whole DBMS processes and knowledge specially part of DBMS architecture/design process.
For the detailed explanation over the topic, yes this unbend under UML diagrams - ER diagrams.
I am pretty new in this game so please do not judge me harshly.
So I need to build a question/answer database for an app.
The idea is simple:
User types a question and if I have an answer in my database, it gives an answer. If I do not have an answer, it goes for my manual moderation, so I can add new answers for the future.
I do not know if someone has already build a software like this and I can just buy one, or do I have to hire someone to build one from the ground. Which language should I use? Which software?
I know that Java, C++ and SQL are most popular languages for that type of jobs, but are they the best solution or there are better languages?
I need a database that can hold a really huge amount of data.
I would really appreciate any help guys!
and if any of you can build me this database, I do not mind to hire a freelancer.
Thank you!
Best Regards,
Ayazhan.
Yes you can do it.
if you have some knowledge in SQl then you can make an local Db in your app and consume it according to requirement. The simple question and answer app contains set of predefined questions.
The above link will help you to develop this app.