MS-Access: SQL UPDATE syntax error, but why? - sql

Question

I'm getting a syntax error in this SQL, and can't seem to figure out why?
The SQL UPDATE returns this on the error:
UPDATE Tankstationer
SET Long='12.5308724', Lat='55.6788735'
WHERE Id = 2;
Here's my code:
foreach (var row in reader)
{
var id = reader.GetInt32(0);
var adress = reader.GetString(1);
var zip = reader.GetDouble(2);
var city = reader.GetString(3);
var adressToParse = adress + " " + zip + " " + city;
GMapGeocoder.Containers.Results result = Util.Geocode(adressToParse, key);
foreach (GMapGeocoder.Containers.USAddress USAdress in result.Addresses )
{
var google_long = convertNumberToDottedGoogleMapsValid(USAdress.Coordinates.Longitude);
var google_lat = convertNumberToDottedGoogleMapsValid(USAdress.Coordinates.Latitude);
Message.Text = "Lattitude: " + google_long + System.Environment.NewLine;
Message.Text = "Longitude: " + google_lat + System.Environment.NewLine;
string updatesql = "UPDATE Tankstationer SET Long='" +google_long+ "', Lat='" +google_lat+ "' WHERE Id = " +id+"";
OleDbCommand update = new OleDbCommand();
update.CommandText = updatesql;
update.Connection = conn;
reader = update.ExecuteReader();
Message.Text = "Done";
}
}

Answer 1

The error is probably because you are executing a reader, but your query does not return anything. Call update.ExecuteNonQuery() instead.

Answer 2

"Long" is a reserved word in Access. If you can't change the schema to call that column something else, put it in brackets:
UPDATE Tankstationer
SET [Long]='12.5308724', Lat='55.6788735'
WHERE Id = 2;

Answer 3

try using update.ExecuteNonQuery() instead of reader.
Saw other comments too late.
I don't use access often, but mine it's using <"> for text delimiter, not <'>

Answer 4

Try:
"id" is being set to Int32 (var id = reader.GetInt32(0);) but you are concatenating it to a string (WHERE Id = " +id+"";). Make sure that id is cast as a string value and not an int.