SQL Select和UPDATE，其中有多列，应选择一行

Question

In SQL server is it possible to insert data where there are different usernames and I have to chose a particular username and under that I have to input the answer column as true for that username only.

This is the query I tried -

$sql = "UPDATE table SET Answer = Truee FROM (SELECT * FROM table WHERE Username='$username') WHERE Answer = 0";

This is shown as an error in my PHP page.

Answer 1

You can't use a FROM in an UPDATE . You shouldn't need to do the separate select.

$sql = "UPDATE table SET Answer = True WHERE Username='$username' AND  Answer = 0";