Connection and query

Nuget package: System.Data.Odbc

// use an ODBC DSN name
using var odbcConnection = new OdbcConnection("DSN=MyConnection");

var odbcDataAdapter = new OdbcDataAdapter("SELECT * FROM table WHERE validity_date < ?", odbcConnection);
odbcDataAdapter.SelectCommand.Parameters.Add("@date", OdbcType.DateTime).Value = maxLimitDate;

var dataTable = new DataTable();
odbcConnection.Open();
odbcDataAdapter.Fill(dataTable);

Console.WriteLine(string.Join("\t,\t", dataTable.Columns.Cast<DataColumn>().Select(x => x.ColumnName)));
Console.WriteLine(string.Join("\n", dataTable.AsEnumerable().Select(x => string.Join("\t,\t", x.ItemArray)));

Get the table names

var tableNames = odbcConnection.GetSchema("Tables")
    .AsEnumerable()
    .Where(r => r.Field<string>("TABLE_TYPE") == "TABLE")
    .Select(x => x.ItemArray[2]);

Console.WriteLine(string.Join("\n", tableNames));