You accept an IT internship at a local charity. The charity wants you to help them with compliance
and auditing requirements.
You need to ensure that a column or combination of columns uniquely identifies each row of a table.
Which constraint should you define?
A.
Primary key
B.
Secondary key
C.
Foreign key
D.
Default key
Primary key – an attribute or set of attributes used to uniquely identify each row.
6
0
I’d say Primairy key too…
4
0
Yes, A is correct answer.
3
0
A
4
0
shit, you suck
1
0
It said ” COMBINATION OF COLUMNS UNIQUELY IDENTIFIES”
2
0
A
1
0