面临
发表于 2025-3-21 19:32:12
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convulsion
发表于 2025-3-21 23:23:22
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exhilaration
发表于 2025-3-22 04:18:16
Optimistic Isolation Levels,na in a system. With optimistic transaction isolation levels, queries read “old” committed versions of rows while accessing data modified by the other sessions, rather than being blocked by the incompatibility of shared (S) and exclusive (X) locks.
小淡水鱼
发表于 2025-3-22 05:58:59
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Forsake
发表于 2025-3-22 10:56:43
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arterioles
发表于 2025-3-22 14:25:26
Yu Huang,Min Xiong,Hongqiang HuThis chapter will discuss the key concept in SQL Server concurrency—.. It will provide an overview of the major lock types in SQL Server, explain their compatibility, and, finally, demonstrate how different transaction isolation levels affect the lifetime of the locks in the system.
arterioles
发表于 2025-3-22 18:40:06
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充满人
发表于 2025-3-22 23:30:39
Case history: Product matching,A deadlock is a special blocking case that occurs when multiple sessions—or sometimes multiple execution threads within a single session—block each other. When it happens, SQL Server terminates one of the sessions, allowing the others to continue.
Moderate
发表于 2025-3-23 01:30:32
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doxazosin
发表于 2025-3-23 07:16:46
https://doi.org/10.1007/978-3-031-29152-4SQL Server uses two additional lock types called . to prevent table and metadata alterations during query execution. This chapter will discuss schema locks in depth along with low-priority locks, which were introduced in SQL Server 2014 to reduce blocking during online index rebuilds and partition switch operations.