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Re:PostgreSQL anti-patterns: read-modify-write cycles (2014) by seunosewa on Wednesday December 21, 2016 @12:01PM (#13230650)
MSSQL transactions are trule serializable by default. MySQL InnoDB supports it too but you have to change the transaction isolation mode.
Re:PostgreSQL anti-patterns: read-modify-write cycles (2014) by wmfiv on Wednesday December 21, 2016 @02:23PM (#13231856)
I believe the default for SQL Server is actually read committed.

https://msdn.microsoft.com/en-us/library/ms175909.aspx

Re:PostgreSQL anti-patterns: read-modify-write cycles (2014) by seunosewa on Wednesday December 21, 2016 @05:22PM (#13233180)
Sorry, I was wrong.
Re:PostgreSQL anti-patterns: read-modify-write cycles (2014) by hmottestad on Thursday December 22, 2016 @11:03AM (#13238138)
MSSQL is read committed by default according to their documentation.