Selecting distinct 2 columns combination in mysql

Question

I have a mysql table that looks like this:

1   value1    value2    3534
2   value1    value1    8456
3   value1    value2    3566
4   value1    value3    734         


        

Answer 1

THe simplest query for this is

SELECT col1, col2, MIN(col3)
FROM myTable
GROUP BY col1, col2