Performing Insert OR Update (upsert) on sql server compact edition

Question

I have c# project that is using sqlserver compact edition and entity framework for data access. I have the need to insert or update a large amount of rows, 5000+ or more to

Answer 1

Maybe you could obtain the result you seek by using simple queries. Let's say the the table you want to insert into or update is like this

TABLE original
     id integer,
     value char(100)

first you could create a temporary table with the new values (you can use a SELECT INTO or other ways to create it)

TABLE temp
    id integer,
    value char(100)

now, you need to do two things, update the rows in original and then insert the new values

UPDATE original 
SET original.value = temp.value
FROM original, temp
WHERE original.id = temp.id

INSERT INTO original 
SELECT * from temp 
WHERE temp.id not IN (select o.id from original o)