Examine the structure of the EMP_DEPT_VU view: Column Name Type Remarks EMPLOYEE_ID NUMBER From the EMPLOYEES table EMP_NAME VARCHAR2(30) From the EMPLOYEES table JOB_ID VARCHAR2(20) From the EMPLOYEES table SALARY NUMBER From the EMPLOYEES table DEPARTMENT_ID NUMBER From the DEPARTMENTS table DEPT_NAME VARCHAR2(30) From the DEPARTMENTS table Which SQL statement produces an error?()
- A、SELECT*FROMemp_dept_vu;
- B、SELECTdepartment_id,SUM(salary)FROMemp_dept_vuGROUPBYdepartment_id;
- C、SELECTdepartment_id,job_id,AVG(salary)FROMemp_dept_vuGROUPBYdepartment_id,job_id;
- D、SELECTjob_id,SUM(salary)FROMemp_dept_vuWHEREdepartment_idIN(10,20)GROUPBYjob_idHAVINGSUM(salary)>;20000;
- E、Noneofthestatementsproduceanerror;allarevalid
正确答案:E
答案解析:有

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