(Choose 1 answer)
Suppose R and S are 2 relations. R is the parent of S.And the relationship between R and S is set to
"ON DELETE CASCADE".This means that:
A. We can delete a row from R if that row has children in S (and in this case, the database server will raise up an error)
B. We can delete a row from R although that row has children in S (and in this case, all the children will be deleted too)
I
Q: 32
