MySQL ON DUPLICATE KEY UPDATE for multiple rows insert in single query

Question

I have a SQL query where I want to insert multiple rows in single query. so I used something like:

$sql = "INSERT INTO beautiful (name, age)
  VALUES
  ('Helen', 24),
  ('Katrina', 21),
  ('Samia', 22),
  ('Hui Ling', 25),
  ('Yumie', 29)";

mysql_query( $sql, $conn );

The problem is when I execute this query, I want to check whether a UNIQUE key (which is not the PRIMARY KEY), e.g. 'name' above, should be checked and if such a 'name' already exists, the corresponding whole row should be updated otherwise inserted.

For instance, in the example below, if 'Katrina' is already present in the database, the whole row, irrespective of the number of fields, should be updated. Again if 'Samia' is not present, the row should be inserted.

I thought of using:

INSERT INTO beautiful (name, age)
      VALUES
      ('Helen', 24),
      ('Katrina', 21),
      ('Samia', 22),
      ('Hui Ling', 25),
      ('Yumie', 29) ON DUPLICATE KEY UPDATE

Here is the trap. I got stuck and confused about how to proceed. I have multiple rows to insert/update at a time. Please give me a direction. Thanks.

Answer 1

Use keyword VALUES to refer to new values (see documentation).

INSERT INTO beautiful (name, age)
    VALUES
    ('Helen', 24),
    ('Katrina', 21),
    ('Samia', 22),
    ('Hui Ling', 25),
    ('Yumie', 29)
ON DUPLICATE KEY UPDATE
    age = VALUES(age),
     ...