12.h. There are TWO illegal records (NOTE:
If there are 2 duplicates, only one of them is illegal). Which are they and
why.
|
Table Name |
Record(s) |
Why Illegal |
|
Teach |
1 & 9 65432109/A123-345 |
BOTH have the same PROF_ID and COURSE_ID Numbers (Violation of Primary Keys) |
|
Classes |
1 & 6 456-11110
|
BOTH have the same COURSE_ID (Violation of Primary Key) |