Elizabeth J. O'Neil Hal Berenson Jim Gray Jim Melton Patrick E. O'Neil Philip A. Bernstein ACM SIGMOD Conference 1995 24 2 1 10 1171 KB ANSI SQL-92 [MS, ANSI] 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 properly charac- terize several popular isolation levels, in Information Systems, DATABASE MANAGEMENT, Languages, SQL. Information Systems, DATABASE MANAGEMENT, Physical Design, Deadlock avoidance. Information Systems, DATABASE MANAGEMENT, Systems, Concurrency. Information Systems, DATABASE MANAGEMENT, Systems, Transaction processing. H.2.2 Information Systems, DATABASE MANAGEMENT, Physical Design, Deadlock avoidance. H.2.3 Information Systems, DATABASE MANAGEMENT, Languages, SQL. H.2.4 Information Systems, DATABASE MANAGEMENT, Systems, Concurrency. H.2.4 Information Systems, DATABASE MANAGEMENT, Systems, Transaction processing.