/// <summary>
/// Executes the query and returns the first column of the first row in the result set returned by the query. All other columns and rows are ignored.
/// </summary>
/// <typeparam name="TValue">The type of the value.</typeparam>
/// <param name="dataQuery">The <see cref="IDataQuery"/> for this extension method.</param>
/// <returns>
/// The value of the first column of the first row in the result set.
/// </returns>
public static TValue QueryValue <TValue>(this IDataQuery dataQuery)
{
return(dataQuery.QueryValue <TValue>(null));
}
