loritndayish loritndayish
  • 12-06-2018
  • Computers and Technology
contestada

discuss the characteristics of relations that make them different from ordinary tables and files

Respuesta :

lilaipo
lilaipo lilaipo
  • 21-06-2018

Ordering of tuples in a Relation : The tuples are not considered to be in order, even though they appear to be in the tabular form. The Ordering of attributes in a relation schema R and of values within each tuples - We consider the attributes in R(A1, A2, .., An) and the values in t=<v1, v2, .., vn> to be in order. Values in a tuple :  All values are considered to be indivisible (atomic). A special null value is used to represent values that are unknown or not applicable to certain tuples.

Answer Link

Otras preguntas

Carmen is at a used bookstore. Paperback books cost $ 1 each, and hardcover books cost $ 2 each. Carmen can spend up to $ 10 in all.A. Write an inequality that
how many different (non-conguerent) triangles  have integer side lengths and perimeter 2014
2.375 divided by 0.05
2.375 divided by 0.05
A space probe has two engines. Each generates the same amount of force when fired, and the directions of these forces can be independently adjusted. When the en
what is 39/50 in a percent
2.375 divided by 0.05
Carmen is at a used bookstore. Paperback books cost $ 1 each, and hardcover books cost $ 2 each. Carmen can spend up to $ 10 in all.A. Write an inequality that
Skateboard Revenue: A skateboard shop sells about 50 skateboards per week for the price advertised. For each $1 decrease in price, about 1 more skateboard per w
Hellppppppp with this twoooooooo