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April 2021
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Natural key
A natural key (also known as business key or domain key) is a type of unique key in a database formed of attributes that exist and are used in the external
Key signature
In Western musical notation, a key signature is a set of sharp (♯), flat (♭), or rarely, natural (♮) symbols placed on the staff at the beginning of a
Primary key
called a natural key, while an attribute created to function as a key and not used for identification outside the database is called a surrogate key. For
Surrogate key
object in the database. The surrogate key is not derived from application data, unlike a natural (or business) key which is derived from application data
Slowly changing dimension
the natural key and Supplier_Key is a surrogate key. Technically, the surrogate key is not necessary, since the row will be unique by the natural key (Supplier_Code)
Windows key
logo key (also known as Windows-, win-, start-, logo-, flag-, or super-key) is a keyboard key which was originally introduced on the Microsoft Natural keyboard
Minor scale
For instance, the A natural minor scale can be built by starting on the 6th degree of the C major scale: Because of this, the key of A minor is called
E minor
A, B, C, and D. Its key signature has one sharp. Its relative major is G major and its parallel major is E major. The E natural minor scale is: Changes
Natural selection
Natural selection is the differential survival and reproduction of individuals due to differences in phenotype. It is a key mechanism of evolution, the
Natural law
Because of the intersection between natural law and natural rights, natural law has been claimed or attributed as a key component in the Declaration of Independence