structured data
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formatted data
connectivity
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1:M, 1:1. M:M
3NF
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A table is in third normal form (3NF) when:
• It is in 2NF.
and
• It contains no transitive dependencies.
Structural independence
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exists when you can change the file structure without affecting the
applications ability to access the file
denormalization
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zip code example
weak entity
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formatted data
connectivity
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1:M, 1:1. M:M
3NF
, Give this one a try later!
A table is in third normal form (3NF) when:
• It is in 2NF.
and
• It contains no transitive dependencies.
Structural independence
Give this one a try later!
exists when you can change the file structure without affecting the
applications ability to access the file
denormalization
Give this one a try later!
zip code example
weak entity
Give this one a try later!