数据库面试题实战解答

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发布时间：2019-03-01

本文共 2171 字，大约阅读时间需要 7 分钟。

??????SQL??????

1. ???????

??????????????????????????????????????????????????????????????????????????????????????

2. ??????????

?????????SQL?????????????????????????????????????????????????????????SQL?

3. ????????

???

????????????????????????

??????????????????

??????????????

???????????????

??????????????????????

???

?????????????????????

???????????????????

??????????????????

4. ????????

??????????????????????

??????????????

????????????????

?????????????????

??????????????????

5. ???????

??????????????????????new????????free?delete???????????????????

6. ?????????????

??????????????CHECK???????????????????????????????????????????????

7. ???????

???????SQL???????????????????????????????ACID???????????????????

???????????????????????

?????????????????

??????????????

????????????

?????????????????????

8. ??????????

??????????????????????????

??????????JOIN???

????????????

?????????????????????

9. where?having???

where?????????????????????????

having????????????????????????????

10. on?in???

on????????????????????????

in???????????????????????????

11. union?union all???

union?????????????????????????

union all?????????????????????????

12. ???????

?????????????

???????????????
- ?????????????????????
- ???????????????????????

13. ????????????????

???????????????????????????????????????????????

14. SQL????

NOT NULL????????

UNIQUE???????

PRIMARY KEY?????????????

FOREIGN KEY???????????????

CHECK??????????

15. ???????

????????????????????????????????????????????

???????????????????????????????????????

16. ??????

Read Uncommitted??????????????????

Read Committed???????????????????

Repeatable Read?????????????????????????

Serializable?????????????????????

17. Truncate vs Delete

Truncate??????????????ROLLBACK??????????

Delete???????????ROLLBACK???????????

18. ????????

???????????????????

?????

???cursor c [????] is SELECT???

???open c?

???fetch c into???

???close c?

19. ??????????

????????????????

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20. Oracle vs MySQL??

?????MySQL???????????????Oracle??????????

?????MySQL???????????Oracle??????????????

?????MySQL?InnoDB?????Oracle??????????????????

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