The ________ attribute specifies that a new e-mail message should be sent when a link is clicked
Fill in the blank(s) with correct word
mailto
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When the item marked 2 in the accompanying figure is selected, the movie will play once and then stop.
Answer the following statement true (T) or false (F)
A particular query can have several formulations, and a query optimizer may produce di?erent query plans with di?erent costs for each.
a. Assume that the Computer Science Department teaches only three 100-level courses: CS110, CS113, and CS114. Write an SQL statement whose result set contains the course codes of all courses that have these as prerequisites in three ways: using OR, UNION, and a nested subquery involving LIKE. b. Write an SQL statement whose result set contains the names of all computer science courses that are prerequisites to other courses in three ways: using a join, a nested subquery involving EXISTS, and a nested subquery involving IN.