试题详情
- 单项选择题 Examine the description of the MARKS table: STD_ID NUMBER(4) STUDENT_NAME VARCHAR2(30) SUBJ1 NUMBER(3) SUBJ2 NUMBER(3) SUBJ1 and SUBJ2 indicate the marks obtained by a student in two subjects. Examine this SELECT statement based on the MARKS table: SELECT subj1+subj2 total_marks, std_id FROM marks WHERE subj1 > AVG(subj1) AND subj2 > AVG(subj2) ORDER BY total_ marks; What is the result of the SELECT statement?（）
A、The statement executes successfully and returns the student ID and sum of all marks for each student who obtained more than the average mark in each subject.
B、The statement returns an error at the SELECT clause.
C、The statement returns an error at the WHERE clause.
D、The statement returns an error at the ORDER BY clause.
关注下方微信公众号，在线模考后查看
热门试题
- You define a multipl
- Which two are true a
- You need to create
- In which scenario wo
- EvaluatetheSQLstatem
- Which two statements
- Which three statemen
- Which best describes
- Which three SELECT s
- In which scenario wo
- Evaluate these two
- Examine the descrip
- Examine the structu
- Evaluate the SQL st
- Examine the SQL sta
- The EMPLOYEES table
- Examine the data fr
- Which three SELECT s
- Which statement desc
- Which four statement