INSERT INTO table_name(c1) VALUES(c1) ON DUPLICATE KEY UPDATE c1 = VALUES(c1) + 1;
INSERT INTO t1 (a,b,c) VALUES (1,2,3) ON DUPLICATE KEY UPDATE c=3; INSERT INTO t1 (a,b,c) VALUES (4,5,6) ON DUPLICATE KEY UPDATE c=9;
UPDATE t1 SET c=c+1 WHERE a=1 OR b=2 LIMIT 1;
INSERT INTO table_tags (tag) VALUES ('tag_a'),('tab_b'),('tag_c') ON DUPLICATE KEY UPDATE tag=tag;