How to display ONLY first row for each value in table

Hi, I have a requirement to use display first row for every ACCNO.any Ideas? query: I used some transaction command |table ACCNO,VALUE ACCNO VALUE 1 100 1 110 2 125 2 134 2 143 3 156 3 123 4 124 5 567 5 129 5 345 EXPECTED OUTPUT: ACCNO VALUE 1 100 2 125 3 156 4 124 5 567