Second normal form (2NF) is the second step in normalizing a database. 2NF builds on the first normal form (1NF). Advertisements Normalization is the process of organizing data in a database so that it meets two basic requirements: There is no redundancy of data (all data is stored...
Question: What is the third normal form (3NF) and how does it differentiate from second normal form (2NF) and first normal form (1NF) ? Answer: Before we start with normalization definitions let’s looks at the goals. Normalization aims to: 1) Eliminate redundancy 2) Store data in ...
( )1.Whatcanweknowfromthesecondparagraph? A.Kérédesignedmanyschoolsasastudent. B.Kéré?sdesignsareappliedalloverAsiaandAfrica. C.KéréisthefirstmalewinnerofthePritzkerPrize. D.KéréwasquitepleasedtowinthePritzkerPrize. 30分钟能力强化组合练(二) 第6页 6 ( )2.WhydoesKéréusuallyusebricksmadeofloc...
Database Normal Forms 0NF — Zero Normal Form: Data that is not yet normalized 1NF — First Normal Form: Data that is de-duplicated and with key attributes identified 2NF — Second Normal Form: Achieves full functional dependencies on the key attributes 3NF — Third Normal Form: Removes tran...
As you might imagine, much like dimensional complexity, the first normal form is very basic compared to the forms that come after it. That's also true for the second normal form as well. Here are the basic definitions of each one of these three successive concepts. ...
What Normal Form is the student table shown ( ) student table (s _ id, s _ name, s _ sex, s _ old, depart _ id, depart _ name) s _ id→s _ name, s _ sex, s _ old, depart _ id depart _ id→depart _ name A.1NF...
13.Whatisthesecondparagraphmainlyabout? A.TheunexpectedbenefitofCOVID-19. B.TheeconomicinfluenceofCOVID-19. C.ThepreventivemeasuresforCOVID-19. D.ThepossiblecausesofCOVID-19. 14.Whatdoestheunderlined word “repress”inthe lastparagraphreferto? A.Control. B.Hold. C.Vary. D.Test. 15.Whatdoesthe...
The answer depends on what kind of system is ultimately adopted. Two distinct types are on the drawing board. The first is a special-purpose lane system, in which certain lanes are reserved for automated vehicles. The second is a mixed traffic system: fully automated vehicles would share the...
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