I have two tables:
post_id user_id post_text post_time
----------------------------------------------------------
1 1 TEXT 2014-01-12 11:07:00
2 2 TEXT 2014-01-12 12:10:00
clicked_id post_id user_id
-----------------------------------------
1 1 1
2 1 2
3 2 1
Whenever an image is clicked, with ajax, I am adding such click to the clicked table and relate it to the user that clicked the image and the post whose click came from. This is just what the tables are used for.
The real question is:
I delete pictures older than the CURRENT_TIMESTAMP of the server** using an event that runs on a minute-ly manner. How to also delete the clicks that are associated with such image via the post_id of both tables?
This is the event that is currently runnning, only deleting the images older than the CURRENT_TIMESTAMP:
DELETE * FROM images WHERE post_time <= CURRENT_TIMESTAMP;
**the date of the posts are set to a future date
Can someone lead me in the right way please? That would be appreciated. Thank you.
declare @CurTime datetime = CURRENT_TIMESTAMP
delete from C
from Images I
join Clicked C
on C.post_ID = I.post_ID
where I.post_time <= @CurTime
delete from Images
where post_time <= @CurTime
It is true for MS SQL. Dont tried in MySQL
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