Mysql three table join results empty set

Question

Hello I have three tables that I have joined but it returns empty result even though there suppose to some result. Here is my sql

SELECT c.code,c.name, a.ltp as begning, b.ltp as enddate, d.interim_cash,d.interim_rec_date,
CAST(((b.ltp - a.ltp) / a.ltp * 100) AS DECIMAL(10, 2)) as chng
FROM eod_stock a
JOIN eod_stock b ON a.company_id = b.company_id
LEFT OUTER JOIN company AS c
ON c.ID = a.company_id
RIGHT JOIN divident_info AS d
ON c.ID = d.company_id
WHERE a.entry_date = "2012-09-24"
AND b.entry_date = "2012-09-25"
AND d.interim_rec_date BETWEEN "2012-09-24" AND "2012-09-25"
AND a.company_id IN (13, 2)
AND d.company_id IN (13,2);

The result i am expecting is like this:

+--------+-----------------+---------+--------+--------+------------------+------------+
| code   | name            | begning | end    | chng   | interim_rec_date |interim_cash|
+--------+-----------------+---------+--------+--------+------------------+------------+
| ABBANK | AB BANK LIMITED |  518.00 | 459.00 | -11.39 |2012-09-24        |10          |
| 1STICB | 1ST ICB M.F.    |  227.00 | 253.00 |  11.45 |                  |            |
+--------+-----------------+---------+--------+--------+------------------+------------+

But I am getting empty set in my result is this because the second one interim info is 0? how can I get all info like above if row is empty then it could be blank but i need other info related to it.

Here are my table schema:

eod_stock:

+-----------------+------------------+------+-----+---------+-------+
| Field           | Type             | Null | Key | Default | Extra |
+-----------------+------------------+------+-----+---------+-------+
| company_id      | varchar(30)      | NO   | PRI | NULL    |       |
| entry_date      | date             | NO   | PRI | NULL    |       |
| entry_timestamp | int(10) unsigned | NO   |     | NULL    |       |
| open            | decimal(16,2)    | NO   |     | NULL    |       |
| high            | decimal(16,2)    | NO   |     | NULL    |       |
| low             | decimal(16,2)    | NO   |     | NULL    |       |
| ltp             | decimal(16,2)    | NO   |     | NULL    |       |
| ycp             | decimal(16,2)    | NO   |     | NULL    |       |
| cse_price       | decimal(9,2)     | NO   |     | NULL    |       |
| cse_volume      | decimal(18,2)    | NO   |     | NULL    |       |
| total_trade     | int(30)          | NO   |     | NULL    |       |
| total_volume    | int(30)          | NO   |     | NULL    |       |
| total_value     | decimal(18,4)    | NO   |     | NULL    |       |
+-----------------+------------------+------+-----+---------+-------+

divident Info:

+------------------+--------------+------+-----+-------------------+-----------------------------+
| Field            | Type         | Null | Key | Default           | Extra                       |
+------------------+--------------+------+-----+-------------------+-----------------------------+
| divident_ID      | int(11)      | NO   | PRI | NULL              | auto_increment              |
| company_id       | int(11)      | NO   |     | NULL              |                             |
| year             | year(4)      | NO   |     | NULL              |                             |
| right_base       | int(11)      | NO   |     | NULL              |                             |
| right_new        | int(11)      | NO   |     | NULL              |                             |
| right_dec_date   | date         | NO   |     | NULL              |                             |
| right_rec_date   | date         | NO   |     | NULL              |                             |
| interim_cash     | decimal(6,2) | NO   |     | NULL              |                             |
| interim_stock    | decimal(8,2) | NO   |     | NULL              |                             |
| interim_dec_date | date         | NO   |     | NULL              |                             |
| interim_rec_date | date         | NO   |     | NULL              |                             |
| annual_cash      | decimal(6,2) | NO   |     | NULL              |                             |
| annual_stock     | decimal(8,2) | NO   |     | NULL              |                             |
| annual_dec_date  | date         | NO   |     | NULL              |                             |
| annual_rec_date  | date         | NO   |     | NULL              |                             |
| update_time      | timestamp    | NO   |     | CURRENT_TIMESTAMP | on update CURRENT_TIMESTAMP |
+------------------+--------------+------+-----+-------------------+-----------------------------+

Please can you help me to find out the result?

Answer 1

So finally I got what i needed here is the query:

 SELECT c.code,c.name, a.ltp as begning, b.ltp as enddate, d.interim_cash,d.interim_rec_date,      d.annual_rec_date,d.annual_cash,
 CAST(((b.ltp - a.ltp) / a.ltp * 100) AS DECIMAL(10, 2)) as chng
 FROM eod_stock AS a

 LEFT OUTER JOIN eod_stock AS b
 ON a.company_id = b.company_id

 LEFT OUTER JOIN company AS c
 ON c.ID = a.company_id

 LEFT OUTER JOIN dividend_info AS d
 ON c.ID = d.company_id AND d.interim_rec_date BETWEEN "2012-09-24" AND "2012-09-25" AND       d.annual_rec_date BETWEEN "2012-09-24" AND "2012-09-25"

 WHERE a.entry_date = "2013-09-24"
 AND b.entry_date = "2013-09-25"
 AND a.company_id IN (13, 2,4,5);

Thanks Gordon Linoff for bring me on the track i was messing up with the right join

Answer 2

This is your query:

SELECT c.code,c.name, a.ltp as begning, b.ltp as enddate, d.interim_cash,d.interim_rec_date,
       CAST(((b.ltp - a.ltp) / a.ltp * 100) AS DECIMAL(10, 2)) as chng
FROM eod_stock a JOIN
     eod_stock b
     ON a.company_id = b.company_id LEFT OUTER JOIN
     company AS c
     ON c.ID = a.company_id RIGHT JOIN
     divident_info d
     ON c.ID = d.company_id
WHERE a.entry_date = "2012-09-24" AND
      b.entry_date = "2012-09-25" AND
      d.interim_rec_date BETWEEN "2012-09-24" AND "2012-09-25" AND
      a.company_id IN (13, 2) AND
      d.company_id IN (13, 2);

Personally, I find it very hard to follow queries where left joins are mixed with right joins: much easier to have a structure only using left joins so you can readily see which table drives the query.

In any case, your where clause is undoing the effects of the outer joins. In addition to the conditions you have explicitly listed, you are also saying:

a.entry_date is not null and
b.entry_date is not null and
d.interim_rec_date is not null and
a.company_id is not null and
d.company_id is not null

It is really hard to say which of these conditions you need to eliminate to get the results you want. What I can say is that some of these should go into the on clauses rather than the where clause. That is the best solution. You can also change the where to be something like this:

WHERE a.entry_date = "2012-09-24" AND
      b.entry_date = "2012-09-25" AND
      d.interim_rec_date BETWEEN "2012-09-24" AND "2012-09-25" AND
      a.company_id IN (13, 2) AND
      d.company_id IN (13, 2) AND
      (a.entry_date is null  or a.company_id is null or b.entry_date is null)

However, you might want only one or two of those conditions. Note the conditions on d should stay in the where clause because the right outer join is keeping all rows in d, so the would not be NULL (unless NULL in the original data).

Answer 3

try this :

SELECT c.code,c.name, a.ltp as begning, b.ltp as enddate, 
d.interim_cash,d.interim_rec_date,
CAST(((b.ltp - a.ltp) / a.ltp * 100) AS DECIMAL(10, 2)) as chng
FROM eod_stock a
JOIN eod_stock b ON a.company_id = b.company_id
LEFT OUTER JOIN company AS c
ON c.ID = a.company_id
RIGHT JOIN divident_info AS d
ON c.ID = d.company_id AND d.interim_rec_date BETWEEN "2012-09-24" AND "2012-09-25"
AND d.company_id IN (13,2)    
WHERE a.entry_date = "2012-09-24"
AND b.entry_date = "2012-09-25"
AND a.company_id IN (13, 2);