Questions tagged [unique-data]

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2answers
105 views

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 ...
2
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4answers
162 views

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 (...
-1
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1answer
91 views

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 ...
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3answers
158 views

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 ...
2
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2answers
756 views

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
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1answer
82 views

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 ...
-1
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2answers
93 views

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 ...
3
votes
1answer
184 views

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 ...
10
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2answers
4k views

Is there an elegant way to check unique contraints 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 ...