[单选]
Examine this statement:
SELECT student_id, gpa
FROM student_grades
WHERE gpa > &&value;
You run the statement once, and when prompted you enter a value of 2.0. A report is produced. What happens when you run the statement a second time?（）

A . An error is returned.
B . You are prompted to enter a new value.
C . A report is produced that matches the first report produced.
D . You are asked whether you want a new value or if you want to run the report based on the previous value.

You performed an incomplete recovery on your Oracle Database 10g database using the following command： SQL> RECOVER DATABASE 2 UNTIL TIME ’2004-08-05：12：10：03’ 3 USING BACKUP CONTROLFILE； In which situation would the above recovery be required？（） A user table was lost at the specified time.。 A redo log file was lost at the specified time.。 The backup control file is on a faster disk than the current one.。 The current control file has a different path compared with the intended time of recovery.。 The current control file does not match the physical structure of the database at the intended time of recovery.。分子机械理论曹禺一生共写下剧本（）。 14部。 15部。 16部。 17部。下述关于药物毒性反应的叙述，正确的是（）一次用量超过剂量。长期用药。病人对药物高度敏感。病人肝或肾功能低下。病人对药物过敏。简述使用DataAdapter获取数据的步骤。

Examine this statement:
SELECT student_id, gpa
FROM student_grades
WHERE gpa > &&value;
You run the statement once, and when prompted you enter a value of 2.0. A report is produced. What happens when you run the statement a second time?（）

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[单选] Examine this statement: SELECT student_id, gpa FROM student_grades WHERE gpa > &&value; You run the statement once, and when prompted you enter a value of 2.0. A report is produced. What happens when you run the statement a second time?（）

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[单选]
Examine this statement:
SELECT student_id, gpa
FROM student_grades
WHERE gpa > &&value;
You run the statement once, and when prompted you enter a value of 2.0. A report is produced. What happens when you run the statement a second time?（）