How to use ON DUPLICATE KEY in insert statement
Problem:In case of inserting or updating record we use separate logic using if statement or case statement:
e.g.:
if(i==0)
insert here
if(i=1)
update here
we can terminate the above if statement by using On Duplicate Key.
by using this only one statement can be use for insert and update record.
*note: user_nm coulmn must be unique
Example:
INSERT INTO `posts` (`user_nm`, `no_of_update`, `inserted_on`, `update_on`)
VALUES ('a_user', 1, NOW(), NOW())
ON DUPLICATE KEY
UPDATE `no_of_update` = `no_of_update` + 1, `update_on` = NOW()
Posts
