Looping through dataframe rows and compare them

I am working with a huge dataframe and I want to loop through rows and compare them. If Value and DATE are the same in different rows I would like to merge them doing some statistics, eg, minimum of minimums etc..

Value   MIN    MAX   MEAN     STD    DATE
0       -2460  -454  -1413.1  254.8  20181223
1       -2361   619  -1348.3  443.0  20181223
0       -2677  -483  -1626.3  258.8  20181227
1       -2629   256  -1477.5  378.0  20181227
2       -2682   598  -1486.0  319.4  20181227

Any ideas?