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This prevents records from being overwritten incorrectly, but allows only one record to be processed at a time, locking out other users who need to edit records at the same time. To allow several users to edit a database table at the same time and also prevent inconsistencies created by unrestricted access, a single record can be locked when ...
A transaction Ti that inserts, updates or deletes a tuple ti in a relation r must update all indices to r and it must obtain exclusive locks on all index leaf nodes affected by the insert/update/delete; The rules of the two-phase locking protocol must be observed. [1] Specialized concurrency control techniques exist for accessing indexes. These ...
In the figure, the fraction 1/9000 is displayed in Excel. Although this number has a decimal representation that is an infinite string of ones, Excel displays only the leading 15 figures. In the second line, the number one is added to the fraction, and again Excel displays only 15 figures. In the third line, one is subtracted from the sum using ...
Vietnam was mentioned in Josiah Conder's 1834 Dictionary of Geography, Ancient and Modern as the other name to refer to Annam. Annam, which originated as a Chinese name in the seventh century, was the common name of the country during the colonial period. Nationalist writer Phan Bội Châu revived the name "Vietnam" in the early 20th century ...
Vietnam, A History. New York: Viking Press, ISBN 0-14-026547-3; Michael P. Kelley. 2002 Where We Were In Vietnam, 1945–1975. Hellgate Press. ISBN 1-55571-625-3; Gabriel Kolko. 1994. Anatomy of a War: Vietnam, the United States, and the Modern Historical Experience London: Phoenix Press. Guenter Lewy. 1978. America in Vietnam. New York: Oxford ...
France, including its overseas territories, has the most time zones with 12 (13 including its claim in Antarctica and all other counties). Many countries have daylight saving time, one added hour during the local summer, but this list does not include that information. The UTC offset in the list is not valid in practice during daylight saving time.
Common English country name: Vietnam or Viet Nam; Official English country name: Socialist Republic of Vietnam; Common endonym: Việt Nam; Official endonym: Cộng hòa Xã hội Chủ nghĩa Việt Nam; Adjectival: Vietnam, Vietnamese; Demonym: Vietnamese; Etymology: Name of Vietnam; International rankings of Vietnam; ISO country codes: VN ...
In Vietnam, dates follow the "day month year" order. All-numeric dates can be written as: [1] d/m/yyyy (9/1/2021) d-m-yyyy (9-1-2021) dd/mm/yyyy (09/01/2021) dd-mm-yyyy (09-01-2021) A dot in the line (period or full stop) can also be used (i.e. 9.1.2021, 09.01.2021). In the full form, the month name is alphanumeric. Example: "9 tháng 1 năm 2021".