The TCP protocol works at the network layer of the OSI model

Give an INSERT statement that might cause a phantom.

Consider a schema with two tables, Table1 and Table2, each having three attributes, attr1, attr2, and attr3, and consider the statement

SELECT T1.attr1, T2.attr1
FROM Table1 T1, Table2 T2
WHERE T1.attr2 = T2.attr2 AND T1.attr3 = 5
AND T2.attr3 = 7

In the linked list implementation of the queue, we had a destructor, copy constructor, and overloaded assignment operator function because:

A. every well-written data structure must have these three functions B. there are pointers to dynamic memory in the private section C. queues often need to be destroyed, copied, and assigned D. the insert function frequently makes use of these