Category of database management systems characterised by the ability to join two data sets by matching on common fields, using mathematics-based relational logic.

learn more… | top users | synonyms

6
votes
3answers
1k views

How to normalize Time Sheet data?

I am having a terrible time finding an appropriate way to store this data in a database. The current excel (simple) version looks something like this: http://i.stack.imgur.com/BEZOw.png Staff and ...
4
votes
2answers
2k views

Two relationships to same table

i have one transaction table, each transaction has 5-6 contacts involved. each contact has the same fields like name, address, cell, email etc. So the best thing I guess is to use the same contact ...
2
votes
1answer
278 views

How to design relationships for variant data?

Help me define the table relationships for data with multiple structures. I need to track leads. Leads come from multiple sources. Each lead source has its own data structure. I need advice ...
8
votes
2answers
2k views

How do Application Like Yelp Retrieve distance information from data base efficiently

For example, say I have a table: Business(BusinessID, Lattitude, Longitude) All are indexed of course. Also there are 1 million records Say I want to find businesses closest to 106,5, for example, ...
0
votes
1answer
864 views

Database design for head to head sports

I am trying to create a database to store details relating to darts matches. Im relatively new to this so was wondering if the design I've come up with below would work. It seems I have lots of places ...
3
votes
1answer
321 views

What scope(s) is “hasMany” a part of?

I realize, when talking about structures, obviously if you say "post hasMany comments" there are many records about comments relating to each post. What I don't understand is what context these sort ...
5
votes
2answers
10k views

Relational Design - Multiple tables into one foreign key column?

Take a table that tracks meat purchases. It has a "meat_id" foreign key column to indicate what type of meat the purchase was. But, the different types of meat are unique in some way (such as USDA ...
0
votes
1answer
990 views

Entity Relationship Model for linked tables

Certainly a noobish question, but I'll ask it anyway. Perhaps someone else will be thankful. ^^ I am getting warmed up with MySQL and I try to understand the concepts of creating well structured ...
14
votes
5answers
2k views

What standard should I follow when naming tables and views?

What standard should I follow when naming tables and views? For instance, is it a good idea to put something like tbl_ at the beginning of table names? Should I designate code/lookup tables in some ...
8
votes
2answers
960 views

How to structure a model to properly and efficiently represent tree-like data on relational databases?

Based on Traversing tree-like data in a relational database using SQL question, I would like to know how the way regularly used to describe tree-like data on relational databases considering physical ...