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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2
votes
1answer
36 views

Best database design for website ranking

I am working on a project in which I need to rank websites in two way - Global rank and their rank in a particular country. There are various factors based on which both are calculated. There are ~200 ...
4
votes
6answers
805 views

Best database to store and retrieve Word and Excel documents

My current project is to create a barcode system (for lack of a better word) that is linked to a database (was not given more information or directions). My task is to have a barcode scanner ...
1
vote
1answer
46 views

What kind of database should I use?

I'm designing a new system and I'm wondering what kind of DB should I use for my needs. I have a tree structure of nodes, where each node has historic values. For each historic value it should hold 2 ...
1
vote
1answer
418 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 ...
4
votes
1answer
60 views

Managing and speeding up queries on PostgreSQL table with over 3 trillion rows

I have time series data which spans over 10 years and has over 3 trillion rows and 10 columns. At the moment I use a PCIe SSD with 128GB of RAM and I am finding that querying takes a significant ...
-1
votes
0answers
28 views

What is the right database for my use? [closed]

I need to insert and select them by name, but almost never update. I have 7B records in this format: Id | name(40-50char) | status (bool) what is the right database type for my use? thank ...
-2
votes
0answers
74 views

How to find or create database(s) for use in webapp design?

I'm looking to find out where I'd be able to populate a local database of the parts available through all the vendors in the industry. Preferably something that's updated & maintained by others ...
0
votes
1answer
656 views

Mirror / replicate only 1 table of a database

I need a good way to replicate a single table in SQL Server 2012 between different servers and different databases. I tried replica which works just fine, but there might be a much better / easier way ...
3
votes
1answer
38 views

Confused about what to use to create the data

I want to create a database for myself. The data has complex grouping. I don't know which system to use to create my database. The data is in groups and sub-group forms, it almost has 5-6 layers of ...
0
votes
2answers
202 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 ...
-1
votes
0answers
24 views

how to shrink database log file size where the database is in full recovery and configured for AOA [duplicate]

How can i shrink database log file where the database is in full recovery and configured for Always on Availability group and i am unable to change it to simple recovery model. Earlier i used to ...
0
votes
1answer
2k 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 ...
1
vote
1answer
1k views

Can I copy a collection in mongoDB from one database to another by copying the db files directly?

I tried using cloneCollection http://docs.mongodb.org/manual/reference/command/cloneCollection/ , but clonecollection takes a lot of time in case of big collection because it starts indexing the data. ...
0
votes
0answers
21 views

Which database is suitable for simple querying/filtering/paging and ability to expire the data?

From what I read, i have to maintain index if I were to use redis. I can set EXPIRE of an object but then I have to update index set myself which is something I rather not do. mongodb has this ...
1
vote
0answers
39 views

Which database technologies to use? [closed]

We are a small construction company that currently has a very old, outdated database system that has been written over the past 20 years in Visual FoxPro. I have now been designated with the task of ...
2
votes
0answers
34 views

How to implement search for world-wide Wikipedia/OSM places with alternative-names

I would like to implement a search-backend which returns a location-aware search results of all Wikipedia / OSM place names, while recognising place names in all languages. Thus, if you search for ...
1
vote
1answer
43 views

Database design for a car dealers website

I am creating a new website for all the car dealers in my region to show their cars on and i need your opinion on the database I have created because I have some doubts. For instance, is it best to ...
1
vote
2answers
31 views

How to set-up a distributed data storage system for The Real Junkfood Project

Context The Real Junkfood Project consists of a network of pay as you feel (PAYF) cafes. We need to log the data from each of ~100 cafes, generating perhaps 50 rows each par day. I estimate that this ...
0
votes
2answers
238 views

How to build a table for a private messaging system that supports replies?

I'm writing a private messaging web application in PHP, the application allows replies such that when you view a message, you also get to see to what was that a reply to, and to what was that a reply ...
1
vote
1answer
83 views

What is a suitable,stable, high performing database for Large Financial Time Series Data? [closed]

I realise this question may have be answered in some form but I would like to gather the thoughts and opinions of actual users with experience in this field of Database design and development. I have ...
22
votes
6answers
8k views

What problems will I get creating a database per customer?

I remember from the stackoverflow podcasts that Fog Creek use a database per customer for Fogbugz. I assume that means the Fogbugz On Demand servers have 10s of thousands of databases. We are just ...
1
vote
4answers
383 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 ...
2
votes
1answer
14 views

Easiest method to retrieve the content of BLOBs from a Sybase databse

I would like know the easiest way (no coding) to extract the content of the blobs of a database. For example, I have a table which contains a column whose format is BLOB. The result I would like to ...
1
vote
0answers
23 views

Dealing with joins in persistent key-value stores

One promising emerging category of NoSQL databases is key-value stores. These include Redis (disk-backed), Riak, Aerospike and others. The problem I struggle with the most is the lack of joins. ...
2
votes
1answer
280 views

Design advice regarding a users/groups/tasks 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
0answers
28 views

Best way to perform real time analytics on a growing collection of json file ( very large ) [closed]

I have a very large collection of JSON file (tens of millions) on S3 and I need to have some kind of aggregation (perform continuously as the collection grows). The aggregation is mainly counter ...
0
votes
1answer
112 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: ...
10
votes
4answers
9k views

Is there a tool to check if my database is normalized to the third normal form?

I learned about normalization recently, and understand how important it is when implementing a new schema. How can I check if my database is 2NF or 3NF compliant ? Manual review is a sure option, ...
0
votes
0answers
8 views

Database storage engine and performance [duplicate]

What will be the performance issue when I change my database storage type from MyISAM to InnoDB?
1
vote
1answer
40 views

Computed Columns Or Views - Database Table Design

I want to store values in certain units along with their corresponding conversions. So for example, there would be following columns DateTime Millimetres Centimetres Metres For a ...
1
vote
0answers
16 views

DBMS for working with sets [closed]

I want to simulate some stochastic system which deals a lot with small sets of integers, e.g. [0,1,5],[2,5,7,9,11]. The number of the sets is so large, and I need to look them up so often that it is ...
0
votes
0answers
20 views

Are there any databases other than DB2 for z/OS that implement true data sharing?

Are there any database products for Linux/Unix/Windows that implement true independent member data sharing similar to what DB2 for z/OS implements? Specifically the individual members are each ...
0
votes
1answer
32 views

Entries with 2 variables. Do I need to make 2 more tables by entries?

In the case of shipment carriers, I have a table with products which price and delay will vary with 2 variables. PRODUCT | SHIPPING DATE | PRICE Carrier 1 | A | B Carrier 2 | ...
2
votes
2answers
77 views

Optimal engine for small lookup tables in MySQL

I have following question: I am designing web application with several dozens of small lookup tables: These tables usualy contain three columns (ID, Name, Description) and a couple of rows (mostly ...
1
vote
0answers
89 views

best way to log large amounts of data

I'm building a new logging system for our company. I'm wondering about the best way to store about 50-100GB data each year. I'm looking at both MySQL and MongoDB. I'm considering MongoDB because it ...
0
votes
0answers
35 views

table design approach for a rental application with several one to many relationships

I'm trying to go about designing a database/tables for the following situation I'm being presented. I'm developing a rental web application with MySQL as db engine. It is for a nonprofit organizations ...
1
vote
0answers
180 views

Backend for social networking mobile app [closed]

I am building a social networking app. I've seen a lot of questions about the very same subject, but none of them answer my questions. I want to store users, relations between them (friends or not, ...
1
vote
0answers
27 views

Which database for microcontroller?

I'm choosing database for my project which involve about 20 Arduino devices. Every device should run standalone, without any external server. This devices will be connected to each other in a network ...
0
votes
0answers
60 views

Design Payment System - Best way to track different payment types and reasons

I am designing a system to track incoming payments from external entities. Payments will be stored on tblPayment and take place in different ways, to mention some: 1) cash 2) cheque 3) credit ...
1
vote
1answer
35 views

Database table data with different set of values

I am trying to create a database table for my project but I stuck in this type of data. The purpose is the admin can add, modify or insert types of questions and choices example: Do you like ...
0
votes
1answer
31 views

DB Recommendation While Minimizing Size

I apologize if this question is too specific, if it is, please let me know! I have searched around both on here and the web on selecting the best project-specific engine to fit your needs, and have ...
0
votes
1answer
33 views

How often to backup database and what are the favoroble practices to do so [closed]

Curious to know on how often you guys back up SaaS? I have determine that i need backups to be done every hour for an application I have, based on how often data is updated an amount of users. I have ...
0
votes
0answers
39 views

What is wrong with my ERD?

I am trying to create a reservation/booking ERD. Is their anything wrong with my current ERD? It must show a supertype and subtype, and it must identify attributes for regular, weak, and associative ...
0
votes
3answers
86 views

secure way to connect with remote Mysql database

I created my application using MySQL and it relies completely on the database I have around 190 tables, and I'm afraid of security breaches and another problem is for remote access I have to add the ...
1
vote
0answers
34 views

Which major database platforms support TTL?

I need to store some data in a database that will be hosted on Amazon Web Services, and I have complete freedom over choosing which database platform to install, based on what I think will best suit ...
0
votes
1answer
24 views

Putting some calculations on a database entry from phpmyadmin

I am creating an online store website for sale/purchase. I have to put a specific percentage of an amount (User enters) in database. for example If user enters 100. I have to deduct 30% of it and I ...
0
votes
2answers
15 views

Structure database(s) dealing with different time points

I have few data sets that give a score for a specific account at a specific point in time. So, account A might have a different score each quarter going back 5 years so. There aren't a ton of data ...
0
votes
1answer
54 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) ...
1
vote
1answer
63 views

Difference beetween mysql 5.5 and 5.6

I have a big performance problem beetwen my local mysql instance and the server. I have this request : DELETE a FROM a LEFT OUTER JOIN ( SELECT MAX(id) as id, `v_id`, `v_statut`, `c_controle`, ...
0
votes
1answer
49 views

Need help on a database model design

I am creating a small booking application with Laravel. It lists some centers. Each center has its own unique rooms. Each room may be booked several times (with dates). From my application, I post the ...