mysql insert duplicate code example

Example 1: mysql insert on dupèlicate

INSERT INTO table_name(c1)
VALUES(c1)
ON DUPLICATE KEY UPDATE c1 = VALUES(c1) + 1;

Example 2: mysql on duplicate key update

UPDATE t1 SET c=c+1 WHERE a=1 OR b=2 LIMIT 1;

Example 3: duplicate row mysql

# Duplicate row and change values in the duplicated row
INSERT INTO table (col1, col2, col3)
# manually insert data to the duplicated row
SELECT "new value", "new value", "new value" FROM table
WHERE something...;