my sql update script code example

Example 1: update query in mysql

-- Set New Employee Password 
UPDATE employee
SET employee.password = '1234'
WHERE employee.email = '[email protected]';

Example 2: php mysql update all rows in table new values

$idresult = $conn->query("SELECT id FROM pictures");

while ($row = $idresult->fetch_assoc()){
   mysqli_query($conn, "UPDATE pictures SET UniqueKey = '$UniqueKey' WHERE id = " . $row['id'];
}