Custom Report For Database Availability

Question

SELECT target_name,
target_type,
SUM (up_time) up_time,
SUM (down_time) down_time,
SUM (blackout_time) blackout_time,
TRUNC( SUM (up_time)
/ (SUM (NVL (up_time, 1)) + SUM (NVL (down_time, 1)))
* 100)
availability_pct
FROM ( SELECT target_name,
target_type,
SUM(TRUNC( (NVL (end_timestamp, SYSDATE) - start_timestamp)
* 24))
total_hours,
CASE availability_status
WHEN 'Target Down'
THEN
0
WHEN 'Target Up'
THEN
0
WHEN 'Blackout'
THEN
SUM(TRUNC( (NVL (end_timestamp, SYSDATE)
- start_timestamp)
* 24))
END
blackout_time,
CASE availability_status
WHEN 'Target Down'
THEN
0
WHEN 'Target Up'
THEN
SUM(TRUNC( (NVL (end_timestamp, SYSDATE)
- start_timestamp)
* 24))
WHEN 'Blackout'
THEN
0
END
up_time,
CASE availability_status
WHEN 'Target Down'
THEN
SUM(TRUNC( (NVL (end_timestamp, SYSDATE)
- start_timestamp)
* 24))
WHEN 'Target Up'
THEN
0
WHEN 'Blackout'
THEN
0
END
down_time,
availability_status
FROM MGMT$AVAILABILITY_HISTORY
WHERE target_type IN ('oracle_database', 'rac_database')
AND availability_status IN
('Target Down', 'Target Up', 'Blackout')
GROUP BY target_name, target_type, availability_status
ORDER BY target_name, availability_status)
GROUP BY target_name, target_type
ORDER BY target_name
Above is the Query that i'm using for the element "Table from SQL" but getting the error "Error rendering element. Exception: ORA-01476: divisor is equal to zero "
Can anyone please help me with fixing this report.
Thanks
Edited by: 822424 on Aug 22, 2011 8:27 AM
Edited by: 822424 on Aug 22, 2011 8:27 AM

Answer 1

The error says that somewhere in you statement you are using a value 0 as an divisor.
So A / B where B = 0
Try to debug you SQL statement to make sure you will never use the value 0 as divisor.
Once you corrected your statement, your report will work fine
Rob
http://oemgc.wordpress.com