Append String To Current Record

hello

does anyone know how to append a string to an existing text field so i have a record and the value of this text field is say "abc" i run an update query which pulls the string "def" out of another table and then now the value is "abcdef"

I have tried the following sql

UPDATE TBL_TmpSubmission
LEFT JOIN TBL_PropertyType ON TBL_TmpSubmission.PropertyType = TBL_PropertyType.PropertyType SET TBL_TmpSubmission.ErrorCode = [TBL_TmpSubmission].[ErrorCode] & "property"
WHERE (((TBL_PropertyType.PropertyType) Is Null));

which I expected to append the string "property" to the field which already had the value "measure" but it just overwrites the string having the same effect as

UPDATE TBL_TmpSubmission
LEFT JOIN TBL_PropertyType ON TBL_TmpSubmission.PropertyType = TBL_PropertyType.PropertyType SET TBL_TmpSubmission.ErrorCode = "property"
WHERE (((TBL_PropertyType.PropertyType) Is Null));

i have a temporary table in my db which is checked for errors, that is to say there are three fields in a further lookup table and three of the fields in this temporary table TBL_TmpSubmission are checked for nonexistent property types, fuel types and measure types by queries with the structure given above

it all has the effect i need of filling in this error code field so the error types can be displayed using a later select query - except when there is say a measure error AND a property error because then one query just overwrites the effect of the other

what i want is to be able to use say letter codes "P", "F", "M", append them to one another and then in my later select display that code so the user can see all the fields which need to be corrected