Do distinct inside SSRS report

My existing SQL returns these values in the dataset select a,b,c,d,e,f,g,h from tableA 1 2 3 4 5 6 7 8 1 2 3 4 9 8 6 5 1 2 3 4 6 3 1 2 1 2 3 4 9 3 1 0 8 6 5 4 2 3 4 5 But in the report I am displaying only a,b,c,d so this is resulting in duplicates being displayed. How do I do distinct inside the SSRS report so that I only display 1 2 3 4 8 6 5 4 as the result. Thanks