Transaction Isolation
Understand how transaction isolation levels in MS SQL Server prevent data inconsistencies during concurrent access. Explore different isolation levels, their effects on read phenomena like dirty or phantom reads, and how to set them to balance consistency and performance.
The MS SQL Server supports the parallel execution of queries. Several users can be connected to the server and perform queries at the same time. Therefore, there can be situations where one transaction tries to access the data while another is modifying it. When two transactions tamper with the same set of data, information might become inconsistent or the results of transactions might not be correct. To avoid such cases, the MS SQL Server employs a blocking mechanism called transaction isolation, which consists of several levels.
Potential issues
Before discussing different levels of transaction isolation, ...