Questions tagged [denormalization]
Denormalization is the process of moving from higher to lower normal forms of database modeling in order to speed up database read performance or to maintain a history.
denormalization
478
questions
-2
votes
0
answers
35
views
Normalized database structure would result in the lowest-level types containing huge amounts of data
I'm using Xano as my database management system.
Here’s how my website content is structured:
- Company (first level type)
-- Division (second level type)
--- Team (third level type)
---- Employee (...
0
votes
1
answer
73
views
Dynamic mapping arbitrary delimited files to single Json structure in ADF
I am looking for help implementing a “know nothing” import and load routine in Azure. Input would be, load-over-load, an arbitrary delimited file of N columns and M rows. Output would be to a Json ...
0
votes
0
answers
28
views
How to properly index by (UNIX) day (epochDay) a denornmalized database
It is impossible to keep a UNIX "universal anchor" for days (LocalDate.now().toEpochDay()) like the way UNIX-time does, since the days of ALL the different regions heavily overlap on top of ...
- 1,221
0
votes
2
answers
627
views
How to denormalize a DateTime-Array to DateTime-Object with Symfony Serializer
I need to denormalize this data with symfony 6
array:4 [
"createdAt" => array:3 [
"date" => "2024-01-09 17:04:37.209330"
"timezone_type" => 3
...
- 317
0
votes
0
answers
89
views
How best to Denormalize a SQL schema into a noSQL (Elasticsearch) mapping
I'm using Elasticsearch to store experiments data and I would like some advise on how best to build my data model.
I can easily imagine it with SQL tables, links and joins; but I struggle finding the ...
- 628
1
vote
1
answer
99
views
How do I model data containing movie titles to retrieve a list of movies by genre?
I have a question regarding data modeling in cassandra. I want to create a cassandra database with movies, actors, ratings etc. I already defined what my tables should look like and I want to create ...
- 21
1
vote
2
answers
407
views
How should I store nested JSON object inside Cassandra?
This is the first time I am working with Cassandra and I have a data structure like following, want to save it inside the Cassandra:
{"user_id": "123",
"user_cards": {
...
- 708
2
votes
0
answers
370
views
Is denormalization more useful in big query?
Is denormalization more useful in BigQuery given that BigQuery does not support indexing? In a traditional RDBMS we can index columns, or use foreign keys, to speed up JOINs, thus making ...
0
votes
1
answer
97
views
What am I doing wrong with this query
Good evening, I'm currently working on an SQL case study that involves solving this problem.
What is the total quantity of each ingredient used in all delivered pizzas sorted by most frequent first?
...
- 3
2
votes
2
answers
2k
views
Error with Symfony Serializer can't normalize int to float
I get an error when I try to denormalize an object with a float attribute but an int value.
Symfony\Component\Serializer\Exception\NotNormalizableValueException:
The type of the "solde" ...
- 321
-1
votes
2
answers
215
views
Surrogate keys in star schema hierarchy dimension
Is it necessary to have surrogate keys for each hierarchy level above the lowest level in a dimension table?
Row City_Key City_Name State
1 1234 Chicago Illinois
2 3245 ...
- 1
1
vote
0
answers
204
views
How to filter multiple fields from Firestore - React JS - Thinking of denormalization
I've been breaking my head thinking about a way to do this so I'll try to be as specific as possible.
I have an application where a user can upload a report of a lost, found or up for adoption pet. ...
0
votes
2
answers
675
views
MySQL select value range within a value range, from a dash-separated column value?
How do I select a value range from a column where two values in it are separated by a dash, using MySQL?
Here's my example table named "example":
The user enters a low value (X) and a high ...
user17225961
-2
votes
2
answers
167
views
Denormalize column
I have data in my database like this:
Code
meta
meta_ID
date
A
1,2
1
01/01/2022 08:08:08
B
1,2
2
01/01/2022 02:00:00
B
null
2
01/01/1900 02:00:00
C
null
3
01/01/2022 02:00:00
D
8
8
01/01/2022 02:...
- 17
0
votes
1
answer
413
views
Normalize and de-normalizing data in prediction model
I have developed a Random Forest model which is including two inputs as X and one output as Y. I have normalized both X and Y values for the training process.
After the model get trained, I selected ...
