用唯一的行ID更新mysql表行

Question

I want to update a table row within mysql that doesn't have row id's.

The table name is "unit_status"

unit     is_active   enabled
17625012    Active      0

I have 2 million of these but want to update this single row to change enabled to "1"

I'm struggling - sorry.

Answer 1

update unit_status
set enabled = 1
where unit = 17625012    
and is_active = 'Active'
and enabled = 0
limit 1

Answer 2

You can try:

UPDATE unit_status SET enabled = 1 WHERE unit = 17625012 AND is_active = 'Active' AND enabled = 0

But you should always have a primary key or a unique key.