Other / Removed from syllabus

In the context of DBMS, consider the two sets T and S given below.

T                        S
I:   Logical schema      L: Views
II:  Physical schema     M: File organization and indexes
III: External schema     N: Relations

Which one of the following is the correct match from T to S?

Consider the following tables T1 and T2.

T1          T2
P   Q       R   S
2   2       2   2
3   8       8   3
7   3       3   2
5   8       9   7
6   9       5   7
8   5       7   2
9   8

In table T1, P is the primary key and Q is the foreign key referencing R in table T2 with on-delete cascade and on-update cascade. In table T2, R is the primary key and S is the foreign key referencing P in table T1 with on-delete set NULL and on-update cascade. In order to delete record $\langle 3, 8 \rangle$ from table T1, the number of additional records that need to be deleted from table T1 is ________.