| ID (Int 11) (Primary key) (Auto increment) | TITLE |
| --- | --- |
| 1 | ... |
| 2 | ... |
| 3 | ... |
| 4 | ... |
| 5 | ... |
| To 10 million rows |  |

| ID (Char 32) (Primary key) | TITLE |
| --- | --- |
| a4a0FCBbE614497581da84454f806FbA | ... |
| 40D553d006EF43f4b8ef3BcE6B08a542 | ... |
| 781DB409A5Db478f90B2486caBaAdfF2 | ... |
| fD07F0a9780B4928bBBdbb1723298F92 | ... |
| 828Ef8A6eF244926A15a43400084da5D | ... |
| To 10 million rows |  |

*If I want to get a specific row from the first table, How much time will take approximately, Same thing with the second table, How much time will take approximately?*

*Is the primary key that carries numbers will be found faster than that carries characters?*

*I do not want to use auto-increment with int like the first table because of [this problem](https://stackoverflow.com/questions/17482554/change-autoindex-number-mysql)*