How to merge the excel table properly

[ppr (Peter Preuss)]

we can implement it by doing a side by side merge:

How to copy one column from DT A to another column DT B - LINQ query

@Hiba_B Assumptions: take A Col Values when Col is not present in B A and B DataTables have same row count So we can implement a dynamic conditional side by side merge Calculate the cols not present in B: [grafik] [grafik] [grafik] prepare dt 3 and add missing cols /transfer also other col settings e.g. datatype [grafik] [grafik] Merge rows: [grafik] (From i In Enumerable.Range(0,dt2.Rows.Count) Let raB = dt2.Rows(i).ItemArray Let raA = arrMissingCols.Select(Function (x) dt1.Rows(i…