Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Critique of ANSI SQL Isolation Levels   ANSI SQL-92 defines Isolation Levels in terms of phenomena: Dirty Reads,
Non-Repeatable Reads, and Phantoms. This paper shows that these phenomena and
the ANSI SQL definitions fail to characterize several popular isolation levels,
including the standard locking implementations of the levels. Investigating the
ambiguities of the phenomena leads to clearer definitions; in addition new
phenomena that better characterize isolation types are introduced. An important
multiversion isolation type, Snapshot Isolation, is defined.

14
The categories of this paper are: math-ph
23
The categories of this paper are: solv-int
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The categories of this paper are: chem-ph
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio
22
The categories of this paper are: chao-dyn
27
The categories of this paper are: comp-gas
16
The categories of this paper are: stat
37
The categories of this paper are: supr-con
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The categories of this paper are: eess
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: astro-ph
3
The categories of this paper are: physics
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The categories of this paper are: hep-lat
2
The categories of this paper are: math