Questions tagged [unique-data]
The unique-data tag has no summary.
12 questions
6
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4
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Protecting against malicious duplicate IDs in a distributed environment
Let's say we have multiple (somewhat autonomous) (micro-)services, and when entities are created, the ID (UUIDs or whatever) can be set externally. How can we ensure that an ID remains unique across ...
- 71
1
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4
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Is using multiple UUIDs decrease chance of collisions exponentially?
For example if you have a single UUID with a collision probability of x, if you concatenate 2 UUIDs, does the collision probability become x^2?
val0 = generate_uuid()
val1 = generate_uuid()
final_val ...
- 1,980
0
votes
2
answers
1k
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Ensure unicity of a 10 characters alphanumeric String
I have a requirement of developing a service that must generate each day few millions of random and unique alphanumeric String of length 10 (I can't increase this length, this is a customer ...
- 137
2
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4
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1k
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Algorithm for permutations of a string of characters, with no duplicate orders
I've seen a lot of good questions about similar problems but not exactly what I'm looking for.
Given: a non-unique set of symbols (or characters)
(1, 1, 2, 3)
Expected: an output similar to this (...
- 223
-1
votes
1
answer
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How to maintain unique, customer facing Booking or Reservation Ids
I am facing trouble in creating a unique, customer facing Booking Id.
It's a simple thing to do at backend where we can create a UUID and maintain uniqueness. But the UUID looks ugly from a Frontend ...
- 161
1
vote
3
answers
2k
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Deduplicating data during batch processing
I constantly struggling to solve data duplication problems
efficiently (storing data from any source to RDBMSes). My main concern is speeding up inserts/batch processing.
Scenario: I read data from ...
- 149
3
votes
2
answers
2k
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Should email be unique across application users?
I am working on a medical application which will be implemented for USA patients and health providers.
I want that there should be only 1 record of a user without any duplication. And I believe that ...
0
votes
1
answer
117
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CRM and external systems: How to associate data with contacts?
This question is about Dynamics CRM but is valid for every system that allows merging entities.
Having data related to a contact in multiple external systems, how would you know which contact the ...
- 180
-1
votes
2
answers
261
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Identifying similar customer data [duplicate]
I have a large database of customers. There's a need to identify customers who have two or more customer IDs.
This comes mostly from people at the front-desk creating new customers instead of ...
- 107
3
votes
1
answer
639
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Reproducible uniqueness
So, I have a bunch of calls that are all being generated with a UUID1 throughout the day. At the end of the call the call is processed and some metrics around that call are generated and stored in ...
- 163
23
votes
2
answers
12k
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Is there an elegant way to check unique constraints on domain object attributes without moving business logic into service layer?
I have been adapting domain-driven design for about 8 years now and even after all these years, there is still one thing, that has been bugging me. That is checking for a unique record in data storage ...
- 10.4k
1667
votes
11
answers
860k
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Which hashing algorithm is best for uniqueness and speed?
Which hashing algorithm is best for uniqueness and speed? Example (good) uses include hash dictionaries.
I know there are things like SHA-256 and such, but these algorithms are designed to be secure,...
- 23.1k