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
22 views

Testing databasis for learning [on hold]

I just instal oracle 12 c on Virtual Dub. I would love to get some sample of working database I can add in and use - to lear, how SQL works, how can I make an export to .xls and so on. Please, can you ...
0
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0answers
26 views

What kind of data cannot be stored economically in a database / data-warehouse?

Someone mentioned this in a presentation but didn't provide any examples. This stuck with me and I am trying to figure out what kind of data couldn't be stored economically in datbases ever since. It ...
0
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0answers
15 views

linking a single table (comment) to multiple tables (article,link,attachment)?

the main idea is that i can post an article , link or an attachment and i can receive comments on each of these types of posts (the structure of the comment is the same) , the problem here is that i ...
0
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3answers
37 views

Which databases support encryption [closed]

I'm searching for a database that can run on Windows and can be accessed with C#. The Database also requires that the data can be encrypted (ideally without backdoors). Can MariaDB serve here?
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0answers
24 views

Database migration for Large Data Set from MySQL to NoSQL

I have an existing APP that has N types of products that is normalized with MySQL. Each types of products have over 500K skus, and one of them are in the in 2M currently. We are currently tracking on ...
0
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1answer
60 views

What is the best design for storing courses subscription data?

Building an app that will manage lessons, students, courses. Each lesson belongs to a certain course. A student can subscribe to a single lesson or to a whole course. So it seems straightforward that ...
1
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2answers
42 views

Database design for attendance feature

My app has a requirement wherin we need to capture attendance details of a class. A class typically has 50-60 students and there will be records with attendance/absense status of each student for a ...
0
votes
1answer
38 views

Database Limits and Possibilities [closed]

I quite obviously have a question about databases. To give you the pertinent information: I am a creative person, college student, wannabe entrepreneur and big dreamer. I take inspiration and ...
0
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0answers
17 views

Retrieving log files from users and dumping into a web based database

Please forgive me for not being familiar with database tools. I am trying to figure out even the best jumping off point for my senior project. Basically I've designed a front end application in ...
0
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1answer
59 views

What's the best database if i want save data temporally? [closed]

I want to create a datalog system so I need to store some int data temporally. What would be the best database (Relational, NO-SQL or some specific) for that purpose? And what would be the best way to ...
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0answers
21 views

Platform to manage and analyze peer evaluations?

Our academic department (at a US university) collects mandatory paper-based peer evaluations at undergraduate level for a number of classes each semester. So in a typical class of 60 students, folks ...
1
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0answers
37 views

postgresql 9.3 with Ubuntu 14.04.1 LTS throw 's ERROR: invalid page in block 105 of relation base/16385/17407

This is Ubuntu 14.04.1 LTS with postgresql 9.3 in production, Now i got this below error's in log. # tail -f /var/log/postgresql/postgresql-9.3-main.log 2015-01-08 14:10:16 IST CONTEXT: automatic ...
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0answers
15 views

Should I install hadoop on a single node

I just bought a desktop computer with 16GB RAM and 1TB drive, i7-quad core. I will be partitioning off 800GB for Ubuntu so I can do some data science type tasks. Is there any advantage to installing ...
0
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0answers
21 views

TPC-DS data generation

Is there a way to generate TPC-DS/TPC-H data using Normal Distribution, i.e., is there a way to specify the distribution type while generating TPC-DS/TPC-H? EDIT : I believe there is an option for ...
1
vote
2answers
36 views

Separate login for user / administrators using mongodb

I have 2 separate groups of users on my website. One is user and the other one is admin. Currently I put them in 2 different collections user and admin and login respectively. My questions is: ...
0
votes
1answer
29 views

tables relationships in database

Just a basic question here but it's been bothering me for a while. Do all tables have to be related to another? I'm trying to design a database so far I have 15 tables, 13 of them have relationships ...
0
votes
1answer
42 views

How can I quantify the business value of normalization?

My company is developing an internal application with a SQL server database which was started earlier by another developer. Now I am Looking at the model,the developer has stopped at 1NF. I proposed ...
0
votes
2answers
68 views

Creating tables with inheritance

I'm fairly new to SQL. I just wanted to create a database from scratch to learn. So I have a table called Addresses and I want to create two tables dependent on it that are Country and State, Im not ...
0
votes
1answer
137 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
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3answers
85 views

Database Design for Paper Submission System

I am learner of Database design, I want to design a database for a journal paper submission system in which one paper can be submitted by one or more author. I have initially two tables Author and ...
1
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1answer
21 views

Does InnoDB Log Files take RAM space or Disk Space

When I set InnoDB Log File size to 512M, does it take the space (512M * 2) from RAM or the SSD Disk space? When I explored, I can see that the log files are located inside /var/lib/mysql folder. So ...
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votes
1answer
347 views

What are the advantages and disadvantages of Firebase for a database?

I am currently developing a site to track credits gained from exams, and how these stack up against the user's goal credits. I am looking for a database system that will store all the possible exams ...
0
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3answers
77 views

Confused about Primary Keys, and Foreign Keys

Im brand new to database design and, I'm slightly confused about Primary Keys, and Foreign Keys and my database design. Context: I'm working on a database of museums and Categories will be one way ...
0
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1answer
66 views

Copy database from one mysql sever to another mysql server

Following are the details of the database and server: Server1: Host Name: abc Port Num: 01 database: test Server2: Host Name: xyz Port Num 02 database: spareparts userid: spts password: abcdefgh@123 ...
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3answers
67 views

Converting huge ASCII file to flat and convert

I am not a db administrator but I thought to ask this question here. I have several very large ASCII files (3-5GB each) that I need to extract the data and then sort it. The instructions say to ...
1
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1answer
64 views

Saas MySQL Multiple Databases or One Database [closed]

I am using MYSQL so Database is the Schema, sorry if not using right terminology. I currently have a Saas product which has multiple databases one for each client with a main databases which we ...
1
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1answer
39 views

Database setup for datalogging

We're currently starting to build a version 2 of our system and one of the things we've noticed with version 1 is that we'll have quite a bit of data so we started to rethink our approach to how to ...
0
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1answer
10 views

Debate on which id to use as reference when quering a one to many table

I have a database that has a One to Many relationship. A few changes are in order and now when I query the output I need to provide just one ID field. The output contains all iterations of the one to ...
1
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1answer
441 views

Small startup: Cassandra + Hadoop or ElasticSearch

To give some context, I am from a small start up (4 team members) and we work in the education space. We've developed an e-learning platform that several schools are already using. We currently have ...
1
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2answers
186 views

Relational Model vs. Database Products [closed]

The formal Relational Model (logical level) for databases is not exactly the same thing as you get with MySQL, Oracle or other major products / implementations of ‘relational’ database management ...
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0answers
16 views

Database Engine Tuning Advisor - is number of queries important or not

By number i don't mean number of unique signature queries I mean raw number For example i have this query select name from my table where id=3 It is a single unique signature Having it only 1 ...
1
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2answers
37 views

DB for storing simple time-stamped values

I don't have that much experience in databases but I need to accomplish this as best as I can. It is rather specific. Database will contain only data structured like this: dataID-timestamp-value ...
1
vote
2answers
102 views

How to architect an analytical BI platform? [closed]

I am working on a new BI project for a medium sized corporation. Right now there is no Analytical infrastructure in place and the reporting is done manually in Excel. There are a few different data ...
0
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0answers
50 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
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2answers
48 views

What database should I use? [closed]

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
109 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 ...
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0answers
29 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
50 views

How to manage MySQL database with Oracle Fusion Middleware?

Is it possible to connect and manage a MySQL database with Oracle Fusion Middleware?
1
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2answers
138 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
30 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
99 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
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4answers
195 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 ...
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votes
2answers
84 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
37 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
93 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
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1answer
199 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
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1answer
36 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
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4answers
308 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
76 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
129 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 ...