I want to get lowest value of each group from two table
Table Are Below
Table 1 Table 2
| GPN | Amt | | GPN | Date |
| A | 10 | | A | 2016-09-10 |
| A | 15 | | A | 2016-09-18 |
| A | 20 | | B | 2016-09-10 |
| A | 25 | | B | 2016-09-11 |
| A | 30 | | B | 2016-09-12 |
| B | 20 | | C | 2016-10-12 |
| B | 40 | | C | 2016-10-13 |
| B | 60 | | C | 2016-10-14 |
| B | 80 | | D | 2016-09-10 |
| B | 100 | | D | 2016-10-13 |
| C | 3 |
| C | 6 |
| C | 9 |
| C | 12 |
| C | 15 |
| D | 7 |
| D | 10 |
| D | 13 |
| D | 16 |
| D | 19 |
| D | 22 |
How i want that value
For Example
Date = 2016-09-10,
On That how many GPN are there so i have to get every GPN's Lowest Amt
So Result Will be like this
Result
| GPN | Amt |
| A | 10 |
| B | 20 |
| D | 7 |
I have tried by using ASC LIMIT 1 so obviously it will show only one raw but but i have no idea how to do that.
and i did it with php loop but i am looking if it is possible in mysql query so that will awesome.