Examine the structure of the EMPLOYEES and DEPARTMENTS tables: EMPLOYEES EMPLOYEE_ID NUMBER DEPARTMENT_ID NUMBER MANAGER_ID NUMBER LAST_NAME VARCHAR2(25) DEPARTMENTS DEPARTMENT_ID NUMBER MANAGER_ID NUMBER DEPARTMENT_NAME VARCHAR2(35) LOCATION_ID NUMBER You want to create a report displaying employee last names, department names, and locations. Which query should you use?（） ["SELECT e.last_name, d. department_name, d.location_id FROM employees e NATURAL JOIN departments D USING department_id ;","SELECT last_name, department_name, location_id FROM employees NATURAL JOIN departments WHERE e.department_id =d.department_id;","SELECT e.last_name, d.department_name, d.location_id FROM employees e NATURAL JOIN departments d;","SELECT e.last_name, d.department_name, d.location_id FROM employees e JOIN departments d USING (department_id )"]
剪应力的影响
用直流电桥测量开关的接触电阻时，电桥指示的电阻随时间的增大而（）。 ["增加","不变","减小"]
广州公共汽车561路“柯子岭――车陂”，始末站为“柯子岭”和“车陂”，安排两个站长（基层调度员）分别负责这两个始末站的调度组织工作。设该线路17：00~18：00为高峰期，行车作业方案为高峰期单程运行时间40min，平峰期为35min。某天编号为001的车辆在线运行片段如下：第3车次在18：40从“柯子岭”发车开出，发车间距为5分钟，车辆在19：20到达终点站“火车站”，运行是否正点？
You work as a database administrator for Certkiller .com. Users in the Certkiller PROD database complain about the slow response when accessing the database. In the Active Session Waiting： Configuration page you find that the majority of the wait time is for the redo log buffer.Further investigation using the Run Queue graph and operating system tools reveals that the redo log files are on the same disks， and that the disk I/O for the redo log files is the reason for the performance degradation. Which two actions would you take to gain performance？（） ["Increase the size of redo log files","Increase the size of redo log buffer","Increase the number of redo log files","Place the redo log files on a separate disk","Decrease the number of redo log groups to two","Increate the number Log Writer （LGWR） proce"]
有氧耐力训练
