I had read data from an XML file into DataSet by using c# than I want to identify duplicate (completely the same ) rows in that set. I tried such kind of grouping and that works!
var d= from r1 in table.AsEnumerable()
group r1 by new
{
t0 = r1[0],
t1 = r1[1],
t2 = r1[2],
t3 = r1[3],
t4 = r1[4],
t5 = r1[5],
t6 = r1[6],
t7 = r1[7],
t8 = r1[8],
}
into grp
where grp.Count() > 1
select grp;
But the number of data columns can be differ, so I cannot apply static grouping in query like above. I had to generate the grouping array dynamically?
I don't want to delete dublicate, I just want to find them!
DataFrame. duplicated() method is used to find duplicate rows in a DataFrame. It returns a boolean series which identifies whether a row is duplicate or unique.
A find duplicates query allows you to search for and identify duplicate records within a table or tables. A duplicate record is a record that refers to the same thing or person as another record.
var rows = table.AsEnumerable();
var unique = rows.Distinct(DataRowComparer.Default);
var duplicates = rows.Except(unique); // , DataRowComparer.Default);
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