【简答题】阅读理解。 Many (许多) English people (人) have three names, a first name, a middle name and a last name (or a family name). For example (例如), my name is James Allan Green. James is my first name. Allan is my...
【单选题】Examine the structure of the EMPLOYEES table: You need to create an index called NAME_IDX on the first name and last name fields of the EMPLOYEES table. Which SQL statement would you use to perform th...
A.
CREATE INDEX NAME_IDX (first_name, last_name);
B.
CREATE INDEX NAME_IDX (first_name AND last_name);
C.
CREATE INDEX NAME_IDX ON (first_name, last_name);
D.
CREATE INDEX NAME_IDX ON employees (first_name AND last_name);
E.
CREATE INDEX NAME_IDX ON employees(first_name, last_name);
F.
CREATE INDEX NAME_IDX FOR employees(first_name, last_name);