I am trying to build a function where it calls a dialog box to select an excel file to upload. Once the file is selected then read all data from worksheet 1 except for the header row and insert them into a table while omitting duplicates.
In the excel file, I have 4 columns of data I need to insert into a table called tblParcel which already contains some data from previous transactions. Since there might be overlapping of data, I need a function where it would omit duplicate data when inserting them into the table.
p.s. I need to do this without the usage of SQL Import and Export feature.