问题
单项选择题
至(32)题是基于如下两个关系，其中雇员信息表关系EMP的主键是雇员号，部门信息表关系DEPT的主键是部门号。
若执行下面列出的操作，哪一项操作不能成功执行
答案
参考答案：C
解析： 因为在EMP中存在部门号为’02’的记录，所以不能将DEPT中部门号=’02’的部门号改为’10’。
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至(32)题是基于如下两个关系，其中雇员信息表关系EMP的主键是雇员号，部门信息表关系DEPT的主键是部门号。
若执行下面列出的操作，哪一项操作不能成功执行
参考答案：C
解析： 因为在EMP中存在部门号为’02’的记录，所以不能将DEPT中部门号=’02’的部门号改为’10’。
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| John Brown, an office worker, lives in Washington. He inherited (继承) $ 1,000,000 when he was 23. He didn't feel 1 at all. His college friends were looking for their first jobs, but he didn't have to. John decided to 2 living a simple life like everyone else. He didn't tell any of his friends and gave his $100,000 of his money to a 3 that helped poor children to live better lives. Today he is 36, he 4 wears cheap shoes and owns a small car only, but he is much happier. Once, John went to meet a little girl in Africa. He said the meeting was very 5 . "When I met her, I felt very, very happy, "he said. "I saw that the money 6 for a very good plan. It brought me 7 to the child in a way that giving money 8 cannot. ""I want to do everything I can," he added. |
| ( )1. A. rich ( )2. A. stop ( )3. A. hospital ( )4. A. also ( )5. A. exciting ( )6. A. invented ( )7. A. friendly ( )8. A. pretty | B. happy B. have B. family B. still B. relaxing B. was invented B. honest B. alone | C. lucky C. keep C. school C. ever C. boring C. used C. closer C. sure | D. confident D. agree D. charity D. never D. frustrating D. was used D. quieter D. extremely |