试题详情
- 单项选择题 Evaluate this SQL statement: SELECT e.EMPLOYEE_ID,e.LAST_NAME,e.DEPARTMENT_ID, d.DEPARTMENT_NAME FROM EMP e, DEPARTMENT d WHERE e.DEPARTMENT_ID = d.DEPARTMENT_ID; In the statement, which capabilities of a SELECT statement are performed?（）
A、Selection, projection, join
B、Difference, projection, join
C、Selection, intersection, join
D、Intersection, projection, join
E、Difference, projection, product
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