Need help with a situation. Example table below: column1,column2,column3,_time 1,2,3,21st 1,2,3,22nd 1,2,3,23rd 3,2,1,23rd 4,5,6,23rd if on multiple days/times, column1 ,2 and 3 are same(4th column is _time ) , then add a new field(count) with incrementing numbers by _time , like below. how can this be done ? need help with query.. column1,column2,column3,_time,count 1,2,3,21st,1 1,2,3,22nd,2 1,2,3,23rd,3 3,2,1,23rd,1 4,5,6,23rd,1
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