I'm trying to update multiple tables in a single query, but what I'm using does not seem to do any updating.
UPDATE table1,table2 SET table1.name='John Doe',table2.name='John Doe' WHERE table1.id=1 and table2.id = 1;
Problem is, a row with the same id may not be present in both tables. How can I do an update in a case like this?
In this case, the
id 1 is present in table1, but not in table2.
The idea is to update data in both tables, even if an id does not exist in table1 or table2
How do I write the sql for something like this?
id is present in table1 but not in table2 -> Update table1.
id is present in table2 but not table1 -> update table2.
id is present in both table1 and table2 update both.
id is not present in either tables -> do nothing
just use two update statements
why the need for one?