INSERT INTO .. ON DUPLICATE KEY UPDATE for multiple items

Question

I want to do something like this

INSERT INTO t (t.a, t.b, t.c) 
VALUES (\'key1\',\'key2\',\'value\') 
ON DUPLICATE KEY UPDATE 
t.c = \'value\';
INSERT INTO          


        

Answer 1

Too low on rep for comment, but I wanted to add a slightly more complex syntax that was inspired by @ʞɔıu response. To update multiple fields on duplicate key:

INSERT INTO t (t.a, t.b, t.c, t.d)
VALUES ('key1','key2','value','valueb'), ('key1','key3','value2','value2b')
ON DUPLICATE KEY UPDATE
t.c = VALUES(t.c),
t.d = VALUES(t.d)

Hope that helps someone out there looking to perform bulk insert with multiple on duplicate key update. The syntax escaped me.