Database to be used: COLLEGE DATABASE: STUDENT (USN, SName, Address, Age, Phone, Gender), SEMSEC (SSID, Sem, Sec), CLASS (USN, SSID), SUBJECT (Subcode, Title, Sem, Credits), INTMARKS (USN, Subcode, SSID, UT1, UT2, MTI, MT2)
Answer the following based on the above-given relations:
1) Create tables on Student, Class, Subject
2) Alter relations with any key constraint integrity constraint