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For questions about issues arising when multiple users or processes concurrently access or modify shared information in a database system.

7 votes
3 answers
1k views

Handle concurrency when insertion depends on reading

How can I solve this kind of concurrency in Azure SQL Database V12? [Detailed] The data the user is inserting is the beginning and end of a time interval, such as start: 6:00, end: 7:00. … How can I solve this kind of concurrency in Azure SQL Database V12? …
2 votes
2 answers
336 views

Handle concurrency on Sql Server to modify specific column

I have table that suffers from racing condition and I don't know how to fix it. I can't solve it 100% in code, so I need the server to help me. The scenario Admins of a system may accept or reject a …
3 votes
1 answer
4k views

Handle concurrency on sql server for a booking system

I've been banging my head against the wall trying to solve this problem and I couldn't come up with a solution that absolutely guarantees two users can't book an appointment for the same time. The fl …