Determining what database product best fits the requirements and limitations in a specific situation. This is advice that generally requires much more insight into requirements than can easily be gleaned on a Q&A forum such as StackExchange.

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1answer
34 views

Which database is suitable for Restaurant Menus [on hold]

I just want to do simple service with Finagle which is about the restaurants and its menu. Which database will be suitable for this issue ? PS: I want to use NoSQL database with thrift ,because ...
0
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0answers
42 views

Database that supports fast prefix matching

I have a list of potentially millions of url's, e.g. twitter.com/user1, facebook.com/user2. For every incoming other url (10K/s) I want to find the longest prefix match among all the stored url's. ...
0
votes
2answers
44 views

What database should I use? [on hold]

I am writing a log analysis program in bash. As part of it, I am compiling a list of known errors, so that I can search and reference those errors as part of the known list. I originally was going to ...
1
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0answers
47 views

How to handle many columns / variable schema?

I apologize in advance in case this question has been asked already. I'm working on revamping a reporting application used within my company. The requirements are: Support addition of new fields ...
0
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0answers
16 views

Is there a database system specialized in versioning documents/records?

I'm trying to find the "best" database for my application, which involves: Large (or is it?) amount of data (~15GB of text data) Documents organized in hierarchies (up to ~5 levels of nesting) ...
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0answers
16 views

How to manage MySQL database with Oracle Fusion Middleware?

Is it possible to connect and manage a MySQL database with Oracle Fusion Middleware?
0
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1answer
55 views

Database design suggestions for a data scraping/warehouse application?

I'm looking into the database design for a data warehouse kind of project which involves a large number of inserts daily. The data archives will be further used to generate reports. I will have a ...
0
votes
1answer
19 views

Optional oneToOne relations and criteria field

Introduction: Visitors can fill reports on my website. Those report can either be filled by a legalPerson or a naturalPerson. Constraint: I don't like empty fields and I would like to normalize as ...
1
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0answers
44 views

Conceptual model vs Logical model vs Physical model

I'm doing a work about database, and now I need to show three different images, one image with the conceptual model, other with logical model and other with physical model of a database. I'm looking ...
3
votes
4answers
150 views

Are we a good fit for SQL Server Enterprise and table partitioning?

We currently have a production database that contains millions of records (14 million in the largest table). One function of the database is to provide time sheet information so a single table could ...
-2
votes
2answers
31 views

Repair Corrupt Access Database File [closed]

I am using MS Access 2010 and one of my databases on our shared network does not open for any user. Shows "Unrecognized Database Format." error message. I can't even get it to the point of opening. Is ...
0
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0answers
18 views

employees Evaluation System database

I am new to database designing I want to design an Employees Evaluation System for a company. Based on Competencies Rating Each Manager will rate his/her employees at the end of each year for 6 ...
0
votes
1answer
45 views

SQL or NoSQL for structured clinical data [closed]

I'm designing a database for a primary health center, the idea We basically have a Patient with many Encounters, also the Encounters have to be entered from different Users (Health Professionals). ...
1
vote
1answer
45 views

CRM Address table and it relation

Hi I want to ask about I have this DBD for my CRM I am trying to have the addresss in one table(customer and Employee Address) and both customerID and Employee ID are guid I have in address table FK ...
1
vote
1answer
27 views

Understanding how relationship sides works

So, I have this relations on my tables (see image) and I need to understand some things. I'll enumerate what I understand and what I need from yours is to say if I'm right or not and in case I'm not ...
0
votes
4answers
252 views

Database/Storage engine suggestion for a project involving heavy inserts?

I am looking into a project which involves large number of inserts daily.I will have a list of user's (for example a user set of 500k ) , for which I need to monitor daily certain activities ...
0
votes
1answer
61 views

Creating and designing Air Trafic Control System [closed]

I'm having a class about Database management system, and the prof. gave us a project regarding Air traffic controller system, exact question is "Design and create a system which can manage ...
1
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1answer
66 views

Way to run SQLCMD without storing password in text format

Is there a way to run sqlcmd from a batch file where I don't want to store the password in plain text format. I have done some research and found the system variables method(store password in system ...
1
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0answers
217 views

Mariadb new features vs PostgreSQL? [closed]

Mariadb 10 offer lot of new features. ( https://mariadb.com/products/mariadb/mariadb-vs-mysql) . I want to know, with these new features, will PostgreSQL would be a better solution for newly starting ...
0
votes
1answer
51 views

Train Fare Database Normalisation

I have a database to normalize. The database has details of train ticket fares. The trains have different fares depending on the distance and I have to store these fares in the database It is not an ...
0
votes
1answer
29 views

What table should I host data linking two objects from separate tables?

I've tried searching around, but I'm not too sure how to correctly formulate this question, and found nothing. Could be a duplicate. What is the best way (most efficient way) to host data that will ...
2
votes
0answers
36 views

Database for temporary data with 2^20 variables [closed]

I'm building a site to display graphs based on a data set with 1024^2 different variables (columns, traditionally) per point (record). That is to say, the points are in 1048576-space. The data is ...
1
vote
1answer
60 views

Get data from Berkeley DB with Java [closed]

I have a basic Java program which can list data from Berkeley DB database. The question is how I can list the database scheme to see what object are available? Unfortunately I don't have information ...
1
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0answers
21 views

What is the best type of database for numerous multi-threaded access? [closed]

I am developing a simulation and have limited experience working with databases (very limited SQLite3 exposure). Here is my task: Server that stores a potentially large database (no size requirement ...
0
votes
1answer
203 views

Storing multidimensional array in MongoDB

I am attempting to convert a large MySQL database of product information (dimensions, specifications, etc) to MongoDB for flexibility and to move away from the restriction of a column based table. I ...
3
votes
1answer
88 views

Optimum design / structure for product data database?

What would be the optimum design/structure for product data database, where each product have many variations and many attributes? Attribute sets vary between products, and some attributes have values ...
0
votes
1answer
162 views

Database design for mobile app

At first I would like to say hello to all of you, since it is my first post here on DB Administrators. I am writing an app which store drinks and their data. At the beginning it was storing all in ...
1
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0answers
108 views

How to generate data for News Feed efficiently like facebook , googleplus , twitter e.t.c?

I have created table as post ( post_id int(15) auto_increment primary key , user_id int(11) , post_text varchar(2000) , post_type int(1), ...
1
vote
1answer
67 views

What is the advantages of using auto_increment in database as primary key over set of attributes?

I have table as CREATE TABLE circle ( circle_id int(11) auto_increment primary key not null, user_id int (11) not null, title varchar(255) collate utf8_general_ci not null ); CREATE ...
0
votes
1answer
65 views

What is the strategy of query evaluation in DBMS when Limit is used in query?

I have following tables in database post(post_id , user_id , post_text , parsed_text) ; Comment(comment_id , post_id , user_id , comment_text) ; friend(id , user_id , friend_id ) ; group (id , ...
1
vote
4answers
124 views

Mass data upload from Excel - technology

I am a Developer seeking help in terms of DB technology for a specific requirement. I have done some research but can not conclude with list. Requirement: There will be a web application which will ...
2
votes
2answers
90 views

Is there a simple, safe and low cost way to implement a (limited) database to be outside (close) IT control? [closed]

This question is a spin off of the discussion here (What are the risks of building a database outside IT control?). Background: I'm a risk guy that builds little betas, mostly in Excel-VBA. I have a ...
2
votes
4answers
97 views

What are the risks of building a database outside IT control?

I've been looking for the best StackExchange community to ask this. I hope it fits well here. As a risk analyst in a trading business, I'm often confronted with large volumes of data, way beyond the ...
0
votes
3answers
800 views

MySQL vs. Microsoft Access [closed]

I'm trying to aggregate about 500-1000 MS Excel files that deal with various small business issues (inventory, purchase orders, etc) and I'm currently trying to decide what kind of RDMS I should use. ...
0
votes
1answer
62 views

Does redundancy exists in this table?

I'm studying a DB course and I found this table: In this exercise, the objective is to determine whether the table has redundancy or not. According to the definition of redundancy Data ...
5
votes
2answers
267 views

Searching 500 million records of binary data

I will inserting into a database the signatures of 500,000,000 pictures. The signatures will be generated using libpuzzle. Each signature is 338 bytes. (so 160 GB) plus a table for searching (read ...
0
votes
2answers
131 views

Help understanding database design logic for a secondhand bookstore project in MySQL

I am currently working on a small eCommerce based project that allows users to buy/sell second hand books to/from other users. I am having a hard time making design decisions on how to model the ...
0
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0answers
52 views

Elasticsearch and product characteristics

I have a small question about elasticsearch. Let's say I have a database with products to sell, like an ecommerce. I know that elasticsearch can help me to find the best product with, for instance a ...
1
vote
1answer
64 views

Will a specific denormalization increase performance in a specific scenario?

Suppose I have a table with fields | a | b | c | d | ... | z | which contains millions of records and which will serve millions of queries a day. And the field z holds the id of some parameter which ...
0
votes
1answer
593 views

Best Approach to storing chat history?

I'm building a chat application (Yes, another one :P) and am really curious about the best way to store a chat's history(String username, String Message, Time, and possibly string channel depending on ...
-1
votes
1answer
65 views

Database software advice [closed]

I have this strange question. I'm building a service that stores information into one table. That table has 20 columns. My database will have many billion rows. Right now I'm using Cassandra, but it ...
1
vote
3answers
315 views

Database throughful design vs Quick and dirty design comparison

Take the representation of an Address, here below is a complete and very detailed implementation: here instead is a quick implementation (which more or less contains the same fields, imagine all ...
3
votes
2answers
101 views

Data Modeling for different roles

This is my first post here, so I hope its clear enough. I want to make an application for people who sell, buy, rent and fix a certain product. I need to create a database that would keep the data of ...
0
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0answers
75 views

Using MySQL As A Graph Database, Can It Be Done Efficiently?

So I am currently working on a startup idea with a friend and we've come a long way, it's somewhat functional and I've tried to not let database design decisions slow the progress of the site. As of ...
0
votes
1answer
101 views

Automobile database logic

I am building a web based quoting system for a local automobile dealership. I think I have figured out the logic for the databases but I want to get a second opinion before I start just to make sure ...
2
votes
1answer
134 views

Does creating View cause an overhead to DB?

As my subject suggests, I would like to know does creating views cause an overhead to DB in terms of space, storage, performance?
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0answers
48 views

Best practices for ranking records in flexible way

Suppose we have 10000 records of any product. User search on our website with his given criteria. so we output search results based on given criteria. Now Admin want to rank products in search. so ...
0
votes
1answer
142 views

facebook group alike database scheme

Here are my requirements: one user can have many tasks one group can have many task one group can have many users only invited user by a user can be added into a group Does this db design appear ...
1
vote
1answer
143 views

Precautions when designing database schema if tables are going to have billons of rows

I am about to start work on telephone dictionary kind of project. Its confirm that there are going to be billions of records in dictionary table, and each entry from this dictionary table may have ...
0
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0answers
46 views

how to design my database for faster reads for my situation

I have a situation where i have two categories. Lets say type A and type B. In my database I have some 50,000 type A entries and 100,000 type B entries as of now. For each entry mentioned above(type ...