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troubleshooting Question

Select Distinct certain fields using SQLDataReader

Avatar of ttphil
ttphil asked on
Microsoft SQL Server.NET Programming
11 Comments1 Solution1925 ViewsLast Modified:

I am trying to figure out how to pull in data from an SQL DB without duplicate names.
The fields im using are fname, sname, company and notes.
I use SELECT DISTINCT to  pull in data to a datagrid where sname is in a textbox. I only want it to return 1 instance of each fname, sname and company and to return only the most recent notes instance. There can be many rows with the same fname, sname and company, but at the moment, its including the notes too so I get more than one result.

How might i go about doing this?

Hope this is clear, ive posted my code below.

string sSelectSQL = "SELECT DISTINCT fname, sname, company, notes FROM Main WHERE sname like '" + snametxt.Text + " %' ORDER BY fname ASC";
                    SqlCommand oCommand = new SqlCommand(sSelectSQL, oConnection);
                    oReader = oCommand.ExecuteReader();
                    DataSet ds = new DataSet();
                    DataTable dt = new DataTable("Table1");
                    ds.Load(oReader, LoadOption.PreserveChanges, ds.Tables[0]);
                    datagridview1.DataSource = ds.Tables[0];
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