You want to create a pie-style chart using the Chart Wizard. What must be you do to determine the fields available for use in this chart? （） Select the block that contains the data to appear in the pie chart. 。 Select the table that contains the data to appear in the pie chart. 。 Select the view that contains the data to appear in the pie chart. 。 Nothing. The wizard will automatically create the pie chart based on the highlighted data.。
在（）条件下天然气中某些气体组分能和液态水形成水化物 一定压力。 一定温度。 一定的压力和温度。
You work as a database administrator for Certkiller .com. In your transaction application， you have scheduled a job to update the optimizer statistics at05：00 pm every Friday. The job has successfully completed. Which three pieces of information would you check to confirm that the statistics have been collected？（） Average row size。 Last analyzed date。 Size of table in bytes。 Size of table in database blocks。 Number of free blocks in the free list。 Number of extents present in the table.。
Click the Exhibit button and examine the data in the EMPLOYEES table. Which three subqueries work? （） SELECT * FROM employees where salary > (SELECT MIN(salary) FROM employees GROUP BY department_id);。 SELECT * FROM employees WHERE salary = (SELECT AVG(salary) FROM employees GROUP BY department_id);。 SELECT distinct department_id FROM employees WHERE salary > ANY (SELECT AVG(salary) FROM employees GROUP BY department_id);。 SELECT department_id FROM employees WHERE salary > ALL (SELECT AVG(salary) FROM employees GROUP BY department_id);。 SELECT last_name FROM employees WHERE salary > ANY (SELECT MAX(salary) FROM employees GROUP BY department_id);。 SELECT department_id FROM employees WHERE salary > ALL (SELECT AVG(salary) FROM employees GROUP BY AVG(SALARY))。
静摩擦
关于在下塞柄作业时，对压力平衡叙述错误的是（）
