I want to use SQL and PHP to delete a specific row, events, and the foreign key eventlocation along with it. I tried to use an inner join function, but this gave me an error. Any ideas?
DELETE FROM Events, EventLocation JOIN ON EventLocation.EventLocationID = Events.EventLocationID WHERE EventID = '".$_POST["id"]."' AND EventLocationID = '".$_POST["id"]."'
使用内连接
DELETE Events, EventLocation FROM Events INNER JOIN EventLocation WHERE Events.EventID=EventLocation.EventID
Well bellow query works fine.
DELETE Events, EventLocation FROM Events INNER JOIN EventLocation WHERE Events.EventID=EventLocation.EventID
But in this case you handle easily if the table EventLocation
setting Cascade On Delete with EventID
whwres EventID
is a foreign key of table EventLocation
and primary key of table Events
. Then you just delete row of Events
. So the row of EventLocation
delete autometically which along with Events
.
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