更新查询不会更新行

Question

I'm struggling with a very basic query. I can not see what I'm doing wrong.

Here is the first query I tried:

UPDATE `qrm_logs` SET `billable` = '0' AND `invoice_id` = NULL WHERE `id` = '842'

And the second:

UPDATE `qrm_logs` SET `billable` = 0 AND `invoice_id` IS NULL WHERE `id` = '842'

Column billable has type enum . Column invoice_id is an int type. Also, invoice_id can be nullable.

What causes this problem?

Answer 1

Should be:

UPDATE `qrm_logs` SET `billable` = 0, `invoice_id` = NULL WHERE `id` = 842

note the comma instead of the AND.