I have table like this. So here in below table i have
5 Keys with outage type 0 and out of those for only KEYS(192408 ,192412,192410) i have got some duration in seconds
So here duration_seconds is the amount of time the system is down and hence i need to get the %of uptime by dividing the duration_Seconds with total duration and then substract that value by 1 to get the uptime %.
| ID | KEY | start_time | end_time | duration_seconds | outage_type |
| 232320 | 192408 | 3/19/2015 17:29 | 3/19/2015 17:29 | 0 | 0 |
| 232321 | 192409 | 3/19/2015 17:29 | 3/19/2015 17:29 | 0 | 0 |
| 232322 | 192410 | 3/19/2015 17:29 | 3/19/2015 17:29 | 0 | 0 |
| 318194 | 192412 | 5/15/2015 16:22 | 5/15/2015 16:22 | 0 | 0 |
| 318195 | 192408 | 5/20/2015 23:48 | 5/21/2015 0:12 | 1414 | 1 |
| 318196 | 192410 | 5/25/2015 22:30 | 5/25/2015 23:30 | 1200 | 1 |
| 318196 | 192412 | 5/5/2015 22:30 | 5/6/2015 8:10 | 34800 | 1 |
Here suppose i need to pull out the average uptime% of the month of may by selecting the Month May from Master Calendar so in above example i have only one KEY 192410,192412 as outage type 1 in the table so for the month of MAY all the other 3 KEYS values should be considered as 100% and then the average of all the percentages should be calculated and shown in TEXT BOX .
