Need help in matrix report

Question

<p>Dear fellows,<br>
<br>
I am designing a matrix report of Rooms those are vacant at certian time and
days of week. In this time values are fixed, I have written the mention below
query to design the report.<br>
<b><br>
Table Description is</b> <br>
<br>
<br>
SQL> desc vac_rm<br>
Name                            
Null?     Type<br>
----------------------------------------- -------- ----------------------------<br>
RM_NO                                           
    NOT NULL VARCHAR2(8)<br>
DAY                                                     
NOT NULL VARCHAR2(9)<br>
TIME                                                    
NOT NULL VARCHAR2(20)<br>
VACANT                                                                  
CHAR(1)<br>
<br>
<b>Query is</b> <br>
SELECT day, time,<br>
LTRIM(MAX(SYS_CONNECT_BY_PATH(rm_no,','))<br>
KEEP (DENSE_RANK LAST ORDER BY curr),',') AS Room<br>
FROM (SELECT day,time, rm_no,<br>
ROW_NUMBER() OVER (PARTITION BY day ORDER BY rm_no) AS curr,<br>
ROW_NUMBER() OVER (PARTITION BY day ORDER BY rm_no) -1 AS prev<br>
FROM vac_rm <br>
where vacant = 'Y'))<br>
GROUP BY day, time<br>
CONNECT BY prev = PRIOR curr AND day = PRIOR day<br>
START WITH curr = 1<br>
<br>
The problem occur in this way that when I see the result It show same room no
many time in single cell.<br>
<br>
For Example there is Room A1 and it is vacant on monday at <br>
9:00 AM - 11:00 AM, then it will show<br>
<br>
<b>Time</b>            9:00 AM - 11:00
AM    11:15 AM - 1:00 PM<br>
<b>Day</b> <b><br>
Moday</b>            
A1, A1, A1                A1, A1, A1, A3, A2<br>
<br>
I am very grateful In this regard if you sort out this matter. <br>
 </p>

Answer 1

For the periods, create a seperate dummy query and then use it as column group in the multi query matrix.