Questions tagged [data-modeling]
Elaborating passive data structures based on the analysis of data requirements for the purpose of designing and implementing standardised data formats, databases and data processing systems.
111
questions
3
votes
2
answers
768
views
Is Excel data model as good as or better than Microsoft Access?
I'm working with several Excel worksheets and workbooks that need to consolidated or linked to each other. These workbooks will track client interactions for different team members.
I did the initial ...
- 51
0
votes
1
answer
263
views
API Request/Response Model for showing differences in JSON objects
I am writing an API to merge two different JSON Objects.
Both of these objects can have same as well different number of properties.
Object 1 :
{
"name": "Sam",
"lastName": "Hanks",
"...
- 101
2
votes
1
answer
2k
views
Optional relationship on ERD diagram
Upon generating an entity-relationship diagram of my database I observed several occurrence like this:
This diagram (in IDEF1X notation) shows the following:
Our team's DB convention is that each ...
- 1,406
-1
votes
2
answers
348
views
Correct place to store semi dynamic data
What I mean by semi dynamic data are data that are expected to be changed only with product versions.
Now imagine this scenario, In version 1 of the product, I have item status : SUCCESS , FAIL
In ...
- 241
-1
votes
2
answers
2k
views
When self-referencing in a table, do you prefer `parent_id = null` or `parent_id = id` for a row referencing to itself?
For the discussion, I will provide my example. But I am interested in the broad guidelines.
I save in my postgres DB legislation (law texts) composed of a single header (H), paragraphs (P), sub-...
- 155
2
votes
3
answers
147
views
Many-to-many assignments in user system
I have a few software architecture/design questions related to a technically quite simple problem. We already have all the functionality implemented properly, however from a design perspective it is ...
- 129
1
vote
2
answers
46
views
Best way to model assay steps with low variability?
I have to process biological data input in the format of 96-well plates.
explainer for the non-biologists:
These plates are basically a 2D matrix of 8 rows x 12 columns of small cups called wells. ...
- 19
-1
votes
2
answers
140
views
Help designing a product model with vast amount of properties
I've been asked how to re-design a legacy system by a relative for a company that builds custom chairs. On their website you can customize your chair in about 30 permutations : chair type, material, ...
- 9
0
votes
2
answers
282
views
Creating a "pass-through" dynamic model
We have a layer that exists in our architecture that, for lack of a better term, bears the responsibility of defining the common models. In other words, when systems need to communicate, rather than ...
- 117
0
votes
0
answers
170
views
What kind of diagram best represents the field-level mapping from one system component to another?
In my environment, we have multiple systems developed independently by different teams. Those teams frequently recreate the wheel because they're building applications, not building blocks.
As a ...
- 1
4
votes
3
answers
238
views
ER diagram - feasibility of a requirement
I need to model the following requirement in an Entity-Relationship diagram.
"Customers place orders, which contain a list of products with their quantity and prices. A shipment is made when ...
- 49
0
votes
1
answer
344
views
How to create a flexible datamodel?
I'm trying to create a flexible datamodel and i'm not sure what's the right approach.
My application is used by several clients (big and small). Big clients need all the seperate layers, but small ...
- 49
0
votes
1
answer
97
views
Lightweight data mining + organization & visualization
I'm looking to do some simple data mining that consists of going once per day to a single page and collect the following information:
List of movie theaters
Movies today on each theater
Session times ...
- 11
2
votes
2
answers
870
views
Index / Unique on `deleted_at` column?
We have an Accounts table in a Postgres DB that has a unique index on user_id and product. Users can have many accounts, there's no product table. Occasionally users will create an account ...
- 129
2
votes
2
answers
133
views
how to model 2 objects that refer to each other in the DB
Now I have 2 objects which are "PROBLEM" and "SOLUTION", obviously "SOLUTION" is a proposed solution to a given "PROBLEM", my problem is that in my business I have the following relations:
a "...
- 241