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How get difference of ((A of Start Reading(08/10/2013)) - (A of Stop Reading(07/10/2013))
for table given bellow
| Start Reading | Stop Reading | Date |
A | 5000 | 5200 | 07/10/2013 |
B | 3800 | 4000 | 07/10/2013 |
A | 5800 | 7000 | 08/10/2013 |
B | 5300 | 8000 | 08/10/2013 |
Hi,
maybe you could modify your script to get the previous stop reading value.