试题详情
- 多项选择题 Examine the description of the STUDENTS table: STD_ID NUMBER(4) COURSE_ID VARCHAR2(10) START_DATE DATE END_DATE DATE Which two aggregate functions are valid on the START_DATE column? （）
A、SUM(start_date)
B、AVG(start_date)
C、COUNT(start_date)
D、AVG(start_date, end_date)
E、MIN(start_date)
F、MAXIMUM(start_date)
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