If mycolumn is NULL, you need to handle it differently when incrementing it in a MySQL UPDATE statement. Instead of using the + operator to increment the value, you need to use the IFNULL() function to replace the NULL value with 0, and then add 1 to the result. Here’s an example:
UPDATE mytable SET mycolumn = IFNULL(mycolumn, 0) + 1 WHERE id = 1001;In this example, the IFNULL() function checks if mycolumn is NULL, and if so, replaces it with 0. Then, we add 1 to the result and assign it back to mycolumn.
This way, even if mycolumn is NULL, it will be treated as 0 for the purposes of incrementing.
Note that you can replace 1 with any value or expression that you want to increment mycolumn by.
