Mysql query left join access to variable - mysql

Question

If someone can help me with this one I've got these tables And I would like to get all bookings between two dates, and to know whether any of it is done by someone else or it is fail.
Table:Bookings
id | date | date_end | repeat | day_of_week | user_id | price
---------------------------------------------------------------------
1 2013-07-01 0000-00-00 1 3 1 20
2 2013-07-16 0000-00-00 1 -1 1 10
Table:Bookings_done_by_other
id | date | user_id | booking_id
---------------------------------
1 2013-07-01 2 2
2 2013-07-13 2 2
Table:Bookings_fail
id | date | booking_id
---------------------------
1 2013-07-01 2
2 2013-07-11 2
Table:Tally
id
--
1
....
500
Here is my query which is working well, but I can't manage with it to give me all what I want.
SELECT f.date as fail, b.id, b.date, a.showdate, DATEDIFF(b.date, a.showdate) AS diff
FROM bookings as b
LEFT JOIN bookings_fail f ON (b.id = f.booking_id and DATE(f.date) = DATE(a.showdate) )
,
(
SELECT DATE_ADD('2013-07-01 00:00:00',INTERVAL Id DAY) as showdate
FROM `tally`
WHERE (DATE_ADD('2013-07-01 00:00:00',INTERVAL Id DAY) <= '2013-07-20 00:00:00')
ORDER BY Id ASC
) a
WHERE
MOD(DATEDIFF(b.date, a.showdate), b.repeat) = 0
AND
DATE(a.showdate)>= DATE(b.date)
when is like this is throw error that cant see a.showdate in left join, when I move the left join next to "a" table is throw error that cant see b.id so Is there any way to get this join working?
I would like to get result something like this
id | showdate | fail | by_other |
-----------------------------
1 2013-07-01 NULL 2
2 2013-07-01 1 NULL //Or date
1 2013-07-03 NULL NULL
1 2013-07-04 NULL NULL
1 2013-07-05 NULL NULL
1 2013-07-06 NULL NULL
.............................
1 2013-07-20 NULL NULL
Sorry if My English is not too good, and Thanks in advance to everyone who can help.
Here some pictures hope is getting clear I cant explain what I want properly
This is bookings
Booking table
This is fail
Fail table
I cant put more than 2 links so that's why these two are just like text
so what's happening when I want to get my bookings for some date I do this
s16.postimg.org/l00k1math/image.jpg
What I want to have done is
s12.postimg.org/5o5hbnmdp/image.jpg
But not only for booking with id 1 I wont to be b.id = un.booking_id and then if there is record for fail to appear how is on the last picture
Thanks for your patience

Answer 1

I think I finally understand what you are trying to do. My suggestion is to format your query like this:
SELECT b.id, a.showdate, f.id as fail, o.id as other
FROM (
SELECT DATE_ADD('2013-07-01 00:00:00',INTERVAL Id DAY) as showdate
FROM `tally`
WHERE (DATE_ADD('2013-07-01 00:00:00',INTERVAL Id DAY) <= '2013-07-20 00:00:00')
ORDER BY Id ASC
) a
LEFT JOIN Bookings b ON (
MOD(DATEDIFF(b.date, a.showdate), b.repeat) = 0 AND
DATE(a.showdate)>= DATE(b.date)
)
LEFT JOIN Bookings_fail f ON (
b.id = f.booking_id AND
DATE(f.date) = DATE(a.showdate)
)
LEFT JOIN Bookings_done_by_other o ON (
b.id = o.booking_id AND
DATE(o.date) = DATE(a.showdate)
)
You start by selecting from the generated a table, and join that with the Bookings table. Once you have those two joined it's easy to join any other tables based on the a.showdate and the b.id fields.
I've created a SQL Fiddle example, more or less based on your data, so you can see how it works. http://sqlfiddle.com/#!2/7e151/1