[Unri]

As the title says, how can i make an update command to create the row, if the row with the specified ID does not exist?

[overflow]

You have to check whether the row exists or not. If it doesn't create a new row (INSERT INTO) otherwise just update it (UPDATE). The update statement itself can't create new rows.

[Unri]

Theres no other way?

[Mauzen]

Search for "INSERT … ON DUPLICATE KEY UPDATE"
This one either creates a new row with the given data, or updates the existing one. Exactly what youre looking for I guess.