Darm Darm - 5 months ago 12
MySQL Question

How to increment a field in MySql using "ON DUPLICATE KEY UPDATE" when inserting multiple rows?

How to increment a field in MySql using "ON DUPLICATE KEY UPDATE" when inserting multiple rows?

For one row:

INSERT INTO table
(a, counter_elem)
VALUES
(1, 1)
ON DUPLICATE KEY UPDATE counter_elem = counter_elem+1;


For multiple rows:

INSERT INTO table
(a, counter_elem)
VALUES
(1, 1),
(2, 1)
ON DUPLICATE KEY UPDATE counter_elem = ?;


This doesn't work:

counter_elem = VALUES(counter_elem)+1

TMS TMS
Answer

Exactly the same way!

INSERT INTO table 
  (a, counter_elem) 
VALUES 
  (1, 1),
  (2, 1)
ON DUPLICATE KEY UPDATE counter_elem = counter_elem + 1;

There's no problem there!

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