What is the number of columns returned for the given Relation R if query passed is “∏Name(R)”?
|
Name |
|
A |
|
A |
|
B |
|
B |
|
C |
1
1
2
2
3
3
4
4
What is the number of columns returned for the given Relation R if query passed is “∏Name(R)”?
|
Name |
|
A |
|
A |
|
B |
|
B |
|
C |