Question

Hello I have 2 SQL tables that I would like to merge to view both simultaneously in a datagridview. I can already set this up to view one, via binding it to a dataset, but how can I merge these two based off of a common ID number (for example) that both tables contain?

Current datagridview populate code (the function is fed an empty, new DataTable):

public void populateSingleDataGridView(DataTable dt,  DataGridView dg, string SN_DB_Name)
{
     string selectProgramString = "select * from " + SN_DB_Name;
     SqlDataAdapter sqlDataAdaptor = new SqlDataAdapter(selectProgramString,connectionString);
     dt.Locale = System.Globalization.CultureInfo.InvariantCulture;
     sqlDataAdaptor.Fill(dt);
     dg.DataSource = dt;
}

Answer 1

You can join two tables together:

select table1.Field1 as GridColumn1, table2.Field2 as GridColumn2
from table1
    inner join table2
    on table1.CommonId = table2.CommonId

If you want to keep your current code as is, then one option is to create a view, e.g.

create view GridData
as
    select table1.Field1 as GridColumn1, table2.Field2 as GridColumn2
    from table1
        inner join table2
        on table1.CommonId = table2.CommonId

Then you can pass view name into SN_DB_Name.

Note: This option will force you to create views for any queries with joins. IMHO a better option would be to pass an entire sql string.

Good luck