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.

learn more… | top users | synonyms

-2
votes
0answers
24 views

SQL server Database Consolidation [on hold]

What are the best practices for consolidatig multiple SQL Server databases into a single SQL Server machine? I have gone through many of different solutions but I'm unable to find the best solution. ...
0
votes
0answers
12 views

MySQL along with Firebase for data sync

I'm currently working on a mobile app powered by a web platform, and the mobile app will have some offline capabilities. The application has a small amount of DB entities, and only about 3 of them ...
1
vote
1answer
55 views

Data structure design for supporting arbitrary number of columns in table or database [closed]

I am currently working on a sort-of a meta-modeler to build a free web service so that people can input data and run several models on that data. The task I am currently struggling is: user needs to ...
3
votes
5answers
945 views

Database: One table or many

I am working on a project of classified ads site. I have 12 main categories, and their items are 142, Like vehicles have cars, scooters, bikes, etc. Mobiles Phones have mobiles, tablets, accessories. ...
27
votes
6answers
10k 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 ...
0
votes
0answers
10 views

Merging two data-entry fields as one [closed]

Is merging two data-entry fields with completely different definition into one data-entry field so as to simplify data-entry, then have a schedule task to put it back into the correct fields ? Is this ...
0
votes
2answers
580 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 ...
2
votes
1answer
258 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 ...
0
votes
1answer
3k 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
2k 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 ...
5
votes
2answers
605 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
0answers
15 views

Dealing with multiple user types, modules and requirements

I have the following database schema. Basically, it all comes down to this: - users can have multiple user types - some user types come with specific requirements for a complete profile - there are ...
0
votes
0answers
22 views

Help creating database schema to build database off

not sure if this is the right area for a question such as this but I am looking to create a database for an IS warehouse who deliver laptops, desktops, monitors and other peripherals to different ...
-1
votes
1answer
44 views

Password protected Database Engine with Server features and Store procedure [closed]

I like MS access password protect feature but it does not useful for server based software like as SQLite which has password protect but not useful for server. MS SQL server is one of the best DB ...
1
vote
2answers
56 views

Database design for millions of posts

I have this issue. I have three types of posts a user can generate (some users can generate all some can only generate one type). I have the following types: main, employee and admin posts. I ...
1
vote
0answers
38 views

Alternative to EAV to store data with an unknown structure

For my bachelor thesis I have to build a reseach database which has to meet the requirement of provenance. In the present case it means that among other things I have to store the results of my ...
0
votes
1answer
24 views

Machine learning database Big data

Which databases can I use for storing object features for machine learning use case, in case of Big data? To explain a bit more - object features basically represent an object in a form of an array ...
2
votes
1answer
45 views

Which AWS database services are designed for storing logging records like log4j or log4perl?

I have been using the file system for log4j and log4perl records and want to start using a database to store the information, especially to lookup records organized by pid. We are using MySQL RDS for ...
1
vote
1answer
495 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 ...
0
votes
0answers
28 views

Sql or NoSql design for nested data

In our data model we have classes with one to many relations to eachother TestRun (HasMany) => TestData (HasMany) => AnalyzeRun (HasMany) => Output parameters. We have to query this data in multiple ...
4
votes
1answer
231 views

Re-designing a Database cost and advice [closed]

The web application I am working with has a huge Database that is a real mess, no foreign keys, no constraints, no indexes, no optimization, no normalization, nothing. Until now, the logic has been: ...
1
vote
3answers
267 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 ...
0
votes
2answers
218 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
2answers
112 views

How to design SQL schema that treats historical data as first-class citizen?

I'm currently designing a SQL Server database schema for an application that consists of highly structured "tree" data. So, a table might look like this: id parentId (references id in same table) ...
2
votes
1answer
2k 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. ...
-1
votes
2answers
76 views

DBA responsibilities: should they include suggesting a database engine for a new project? [closed]

I need your opinion on a subject. I have been working as DBA for a short time and I have been asked by the Project Manager which database engine I recommend for a new critical project. The options ...
4
votes
1answer
124 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
2k 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
63 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 ...
5
votes
1answer
156 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 ...
3
votes
1answer
41 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
0answers
26 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
48 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
48 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
2answers
40 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 ...
2
votes
1answer
140 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 ...
1
vote
4answers
415 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
71 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
37 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
361 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
41 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
136 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: ...
11
votes
4answers
12k 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
46 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
17 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
22 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
37 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 | ...
4
votes
2answers
163 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
140 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 ...