هذي الأسئلة اللي جتني ولا هي موجودة في المرفقات اللي فوق:
- Having the same number of attributes is called
1.
same arity
2.
compatibility
3.
unity
4.
identity
- The SQL aggregate function that gives the number of rows containing non-null values for the given column is
1.
min
2.
max
3.
count
4.
sum
- A functional dependency is a relationship between or among
1.
tables
2.
rows
3.
attributes
4.
relations
Tables in second normal form (2NF
Have a composite key
2.
Eliminate transitive dependencies.
3.
Have all non key fields depend on the whole primary key
4.
Have fields must contain a single value