MIS questions. thank you

Which of the following does not violate the referential integrity of a database? updating a foreign key with a value that doesn't match a primary key in the related table deleting a row in a foreign key table without deleting the related row in the related primary key table inserting a new row into a table with a foreign key that doesn't match a primary key in the related table updating a primary key in a primary key table without also updating the foreign keys for the related rows in all related tables Consider the following SQL commands I-SELECTII-ALTERIII-DROPIV-INSERTV-UPDATEVI-CREATE Which commands are DDL commands? II, III, and VI only IV and V only I and IV only I, IV and V only II and III only In total there are forms of normalization. Best practice requires the furst normalization for databases. forms of 3,2 7.2 5. 2 7,3 5. 3