单选题
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?（）
发布日期：2020-04-10
SELECT * FROM emp_dept_vu;
SELECT department_id, SUM(salary) FROM emp_dept_vu GROUP BY department _ id;
SELECT department_id, job_id, AVG(salary) FROM emp_dept_vu GROUP BY department _ id, job_id;
SELECT job_id, SUM(salary) FROM emp_dept_vu WHERE department_id IN (10,20) GROUP BY job_id HAVING SUM (salary) > 20000
None of the statements produce an error; all are valid.
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违约之诉
哪些部件在井道宽度和井道深度的布局中有影响？
使用完全倒圆角时可以直接选择一个面作为放置参照。
内部收益率一般采用插值法求得近似解,对于具有常规现金流量的投资方案来说,内部收益率的近似解与精确解在数值上存在下列关系（ ）。
对磺胺嘧啶正确的叙述是（）
明清科举考试最大的特点就是（）。考试的题目只能出自（），文章必须采用固定格式的（）文体。
机械的正确使用的标志（）
某投资项目，当折现率为15%时，净现值等于500；当折现率为18%，净现值等于—500，则这个固定资产投资项目的内部收益率为（）。
前列腺液检查不能用于诊断（）
哌替啶的临床适应证不包括（）
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