Using MariaDB, I have a view that provides information including the date of the event and whether the invitation was accepted. eventdate
is an event date of type date
. accepted
is a field of type tinyint
, which is 0 if the invitation is rejected, 1 if the invitation is accepted, otherwise it defaults to NULL.
I want to develop a query that sorts by accepted
and eventdate
so that my NULL values will appear in eventdate
order The front. However, if accepted
is not NULL, you want to sort by eventdate
.
My current query is:
SELECT * ORDER BY ACCEPTED FROM INVITE VIEW, eventdate
However, this query sorts the table so that all accepted = NULL
values come first, all 0 values follow, and finally all 1 values At the end, it looks like this:
eventname | eventdate | accepted --------------------------------- Event 1 | 2022-04-14 | NULL Event 2 | 2022-04-25 | NULL Event 3 | 2022-03-28 | 0 Event 4 | 2022-05-03 | 0 Event 5 | 2022-04-14 | 1 Event 6 | 2022-05-01 | 1
I hope to get results similar to this:
eventname | eventdate | accepted --------------------------------- Event 1 | 2022-04-14 | NULL Event 2 | 2022-04-25 | NULL Event 3 | 2022-03-28 | 0 Event 5 | 2022-04-14 | 1 Event 6 | 2022-05-01 | 1 Event 4 | 2022-05-03 | 0
One way is to use the CASE condition to sort the results
result: