Upserting in MS-access

Question

I need to write an SQL query for MS-Access 2000 so that a row is updated if it exists, but inserted if it does not. (I believe this is called an \"upsert\")

i.e.

Answer 1

I usually run the insert statement first and then I check to see if error 3022 occurred, which indicates the row already exists. So something like this:

On Error Resume Next
CurrentDb.Execute "INSERT INTO Table1 (Fields) VALUES (Data)", dbFailOnError
If Err.Number = 3022 Then
    Err.Clear        
    CurrentDb.Execute "UPDATE Table1 SET (Fields = Values) WHERE Column1 = 'SomeValue'", dbFailOnError
ElseIf Err.Number <> 0 Then
    'Handle the error here
    Err.Clear
End If

Edit1:
I want to mention that what I've posted here is a very common solution but you should be aware that planning on errors and using them as part of the normal flow of your program is generally considered a bad idea, especially if there are other ways of achieving the same results. Thanks to RolandTumble for pointing this out.