数据库面试题实战解答

阅读量：237 次

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. ??????????

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

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

20. Oracle vs MySQL??

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

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

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

??

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

转载地址：http://yxnv.baihongyu.com/

你可能感兴趣的文章

Permission denied (publickey,gssapi-keyex,gssapi-with-mic,password). 大数据ssh权限问题 hadoop起不来 hadoopssh错

查看>>

PermissionError:Python 中的 [Errno 13]

查看>>

PermissionError:[Errno 13] 权限被拒绝:‘/manage.py‘

查看>>

Permutation

查看>>

return torch._C._broadcast_coalesced(tensors, devices, buffer_size)RuntimeError: NCCL Error 2:unhand

查看>>

perspective意思_2020年12月英语四级词汇讲解丨考点归纳：perspective

查看>>