Merge Data Table , Join Data Table query

[ppr (Peter Preuss)]

Sounds like a side by side merge
Have a look here:

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…

How to merge the excel table properly

@Vi_ciel have a look on following flow, supporting different rows count e.g. on dt1, dt2 [grafik] With datatable merge details: [grafik] input / output: [grafik] Kindly note: in case of multiple datatables will have the same column name, it has to be handled in advance by making the col names unique find starter help here: SideBySideMerge_AlsoDifferentRCnts.xaml (10.8 KB)

Another option is to write out the different DataTables to the same sheet just by ofssetung the range to right for each datatable