echo mysqli_query($con, "UPDATE stuff SET fieldd = 2 WHERE bla = 7");
It returns 1
when 7
exists in bla
But it also returns 1
when 7
in bla don't exists, why???? Is there a way to find out if the update was successfull/if this row exists without checking if this row exists with extra query before?
One method uses variables:
SET @found = 0;
UPDATE stuff
SET fieldd = if(@found := 1, 2, 2)
WHERE bla = 7;
SELECT @found;
A more formal way is to use mysql_affected_rows()
(see here ). By default, though, this only shows if the row has actually changed.
The technical post webpages of this site follow the CC BY-SA 4.0 protocol. If you need to reprint, please indicate the site URL or the original address.Any question please contact:yoyou2525@163.com.