? every tuple of r1 has adistinct value for k.
Computers and Technology, 31.07.2019 01:10 Ivonne728
If k is a foreign key in relation r1, then
? every tuple of r1 has adistinct value for k.
? k cannot have a nullvalue for tuples in r1.
? k is a key for someother relation.
? k is a primary key forr1.
Answers: 2
Computers and Technology, 23.06.2019 07:30
What is the original authority for copyright laws
Answers: 1
Computers and Technology, 23.06.2019 14:00
How are stop motion special effects in animated films created
Answers: 1
Computers and Technology, 24.06.2019 01:00
The initial tableau of a linear programming problem is given. use the simplex method to solve it. x 1 x 2 x 3 s 1 s 2 z 1 2 4 1 0 0 8 3 4 1 0 1 0 10 minus3 minus12 1 0 0 1 0 the maximum is nothing when x 1equals nothing, x 2equals nothing, x 3equals nothing, s 1equals3, and s 2equals0. (be sure to simplify to lowest terms if necessary.)
Answers: 2
Computers and Technology, 24.06.2019 11:00
Why is it uncommon for users to perform searches directly in database tables? a.)users are discouraged from interacting directly with tables because they might confuse tables with spreadsheets. b.) users are discouraged from interacting directly with tables because this may result in unintended changes to source data. c.)users do not have the technical skills required to perform searches directly in database tables. d.)users do not have the permissions required to perform searches directly in database tables.
Answers: 1
If k is a foreign key in relation r1, then
? every tuple of r1 has adistinct value for k.
? every tuple of r1 has adistinct value for k.
History, 16.07.2019 08:30
History, 16.07.2019 08:30
History, 16.07.2019 08:30
Mathematics, 16.07.2019 08:30
Mathematics, 16.07.2019 08:30
Biology, 16.07.2019 08:30
English, 16.07.2019 08:30
Mathematics, 16.07.2019 08:30