如果唯一键已存在，则插入或更新记录

Posted 2021-02-22

This snippet allows you to insert new record into table. In case a unique key already exists - it updates appropriate fields only, leaving other fields untouched.

-- Unique key for table must be pre-defined
INSERT INTO `tableName`
VALUES (field1,field2,field3,'-1',...,fieldN,'0')
ON DUPLICATE KEY
UPDATE `field1` = 'abc', `field2` = '123'