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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2answers
35 views

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

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
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4answers
72 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
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2answers
87 views

Daily snapshot fact table

I have a list of products per costumer. Costumers can delete or add products to their list. I want to know in each day what is the list of products (and count) by costumer. My first approach is to ...
4
votes
1answer
104 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
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1answer
59 views

Which database (Graph, Riak, etc.) would most aptly solve the following problem?

I am working on a project and was wondering if a Graph database would best solve the following problem: (This is a simplified question) Say that you have a list of friends and you want to see when ...
0
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1answer
112 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 ...
0
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3answers
72 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
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1answer
52 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 ...
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1answer
85 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 ...
2
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1answer
45 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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1answer
55 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 ...
0
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4answers
245 views

Are there any in-memory hybrid databases available?

I am looking for a database that is - Relational (Not NoSQL). Has an in-memory store. Has disk-based backing storage. I want to set up a system where entire contents of the disk are replicated in ...
3
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2answers
783 views

Ready-to-Use Database models example

Where can I find ready-to-use database models ? I don't need a database with data in it, but only schemas (UML diagrams). Perhaps something like the data models at this link, but much more complex ...
0
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2answers
67 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
30 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
51 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 ...
-1
votes
1answer
58 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
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3answers
293 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 ...
2
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1answer
81 views

Method to keep track of large number of sets with high cardinality

We're building an analytics service. One of our needs is to maintain ~100MM sets each with anywhere between one member to 1MM members, with each member represented as a long. We need to be able to ...
13
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6answers
2k views

Is polling the only way for updating app's data from a database?

An application needs to have data as more freshly updated from a database as possible. In such a case, is there any other way for getting the data, besides of a timer based requesting (polling) the ...
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0answers
30 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 ...
2
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1answer
88 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
34 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 ...
1
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1answer
104 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 ...
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0answers
40 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 ...
1
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2answers
124 views

Appropriate database for web analytics? [closed]

I am working on the web analytics it is similar to google analytics, Currently i am using the mongoDB. Problem using MongoDB Writing and reading is performed at the same time so after some point ...
0
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1answer
53 views

Database for a startup [closed]

We are in the process of putting together a whole system for a new startup company. This project is meant to store thousands of requests and each one needs to be stored and displayed in real-time. ...
1
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1answer
71 views

Use Database to Store Data Extracted From Internet

I'm mining 500 million users, and their "followers" from a social network using their API. The extraction of data itself is not a problem, since I can do it with my scripts. However having 500 million ...
2
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2answers
844 views

Should I create a separate user table for different web products within the same platform?

We have a web product for young professional that gives them the possibility to create their page to show their professional identity. So a table users that has both information about the user (email, ...
0
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1answer
110 views

How to model medium.com paragraph comment

If you have used medium.com, I am interested to know more about how to model readers' paragraph comments in database. Specifically, how connections between these comments and paragraphs are modeled? ...
0
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2answers
76 views

DBMS recommandation for C# applications with provides triggers, procedures and if possible free [closed]

I'm here because I need somme advices about the best DBMS to use in my case. Indeed, I've only studied the theory about the databases. So I don't know a lot about the pratice. I'm searching after a ...
1
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3answers
116 views

in-memory SQL database system [closed]

In an application, I am using mysql's TEMPORARY TABLE. Since this application does not need permanent tables, I wonder if I can find an alternative RDMS designed for memory tables. I hope to find an ...
1
vote
0answers
28 views

What database to use for easily handling join-like queries on multiple very large tables? [closed]

I'm currently looking for a database engine than can easily handle queries on multiple collections/tables (at least 5) with aprox 10M entries each. Any advice on what to use?
0
votes
1answer
63 views

Two types of data, so two type of databases?

For a social network site, I need to propose a DB. The application is written in Java & will be hosted on VPS(s) initially. Broadly classified there is two type of data to be stored at backend: ...
1
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1answer
93 views

Handling or preventing conflicts in a multi-user system

I have a web application that is accessed by multiple users from different locations worldwide. Let's say I have an "edit" form for a specific document and two (or more) users are editing the document ...
0
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1answer
71 views

Is PostgreSQL appropriate for processing this large but simple dataset? [closed]

I have a dataset I'm not sure how to store. The structure is simple: 30 numeric attributes identified by about 15 billion x, y, and t values. We're expecting ~17k t values and maybe 90k x/y ...
0
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2answers
133 views

mySQL- large database

I need guideline to setup DBMS(MYSQL or SQL Server 2008). The database size is expected upto 80-100GB in next few months. One main table will contain textual content like essays. Can MySQL handle such ...
6
votes
5answers
3k views

What is the easiest way to get started using databases with real data?

I have a project that could benefit from using a database, but I have no experience with databases, don't have access to a server, and have relatively little experience working with things living ...
0
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1answer
83 views

Suitable database software for small business [closed]

First of all, I apologise if this is in the wrong area. I'm looking for a suitable database program for a small engineering business, which needs to log various jobs. Currently, we're just using an ...
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votes
1answer
106 views

recommendations needed in order to become a junior DBA [closed]

I want to start off work being a junior DBA very soon. At the moment I have a Bsc in ICT 2:2 but my database marks was very strong including an 86 in my oracle assessment which is following a ...
1
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2answers
461 views

Database design experienced view

I want to make a database that stores countries, their respective states, and cities. I am confused how to normalize these. Can anyone help? My ideas: Table 1 Countries (id pk, name , code) ...
2
votes
1answer
356 views

How to prevent high memory, CPU and time consumption by MySQL restore?

I have a local test machine with 2 GB RAM and a dual core processor. I imported a dump on that using mysql -uuser -psecret < script.sql script.sql is a 700 MB file which contains a single ...
1
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0answers
417 views

which role-permission database design?

I want to manage roles and permissions. Most of designs on web look like this tables: Users Roles UserRoles Permissions RolePermissions Here, what is permissions? I am thinking for such a design ...
0
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0answers
81 views

Choosing a database type for recording infrequent changes in a large number of variables

I am writing an application that monitors and archives the values of hundreds of thousands of variables. Since they change infrequently, only updates are recorded after the initial value. Three ...
6
votes
6answers
467 views

Which database engines will allow me to GRANT/REVOKE on a specific column?

If I have a table with a single column of sensitive data, and I want to grant broad use of the table without exposing that one column, I know that I can create a VIEW that gives them access to all the ...
3
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0answers
115 views

What are reasonable options for an in-memory multi-core database?

I'm going to preface this with pointing out that I only need somewhat persistent data. The purpose of this database platform would be to support statistical analysis in R. I usually build my tables ...
0
votes
1answer
84 views

Should database files be on different disk(s) than OS?

My very short overview SQL Server databases are installed as virtual machines on VMWare, there are plugged a few disk areas with the same (or very similair) parameters versions are SQL Server ...
1
vote
1answer
190 views

Switching to NoSQL for native JSON use?

I am rather comfortable writing concrete schemas with explicit primary keys, foreign keys, indexes, views and stored procedures. For queuing I use a NoSQL solution called: Redis. Recently I heard a ...
3
votes
3answers
527 views

Relational vs Non-Relational Database for Events Database

I'm trying to find out whether an SQL or no-SQL solution would be better for creating an events database. I'm creating a ticketing system, similar to ticket master. I know that for either ...
1
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1answer
89 views

Approach for a 2,000 table migration

What might be the best approach when converting or migrating a database containing over 2,000 tables? Where would you begin to tackle such an issue? Steps to take in the first weeks of designing? ...