Value deadband - query 2
- Last UpdatedFeb 07, 2025
- 1 minute read
This query specifies to only return data that changed by more than 5 percent of the tag's full engineering unit range. Using a value deadband of 5 percent equates to an absolute change of 2.95 for 'SysTimeSec.'
SELECT DateTime, Value
FROM History
WHERE TagName = 'SysTimeSec'
AND DateTime >= '2001-12-09 11:35'
AND DateTime <= '2001-12-09 11:37'
AND wwRetrievalMode = 'Delta'
AND wwValueDeadband = 5
The results are:
|
DateTime |
Value |
|
2001-12-09 11:35:00.000 |
0 |
|
2001-12-09 11:35:03.000 |
3 |
|
2001-12-09 11:35:06.000 |
6 |
|
2001-12-09 11:35:09.000 |
9 |
|
2001-12-09 11:35:12.000 |
12 |
|
2001-12-09 11:35:15.000 |
15 |
|
2001-12-09 11:35:18.000 |
18 |
|
2001-12-09 11:35:21.000 |
21 |
|
2001-12-09 11:35:24.000 |
24 |
|
2001-12-09 11:35:27.000 |
27 |
|
2001-12-09 11:35:30.000 |
30 |
|
2001-12-09 11:35:33.000 |
33 |
|
2001-12-09 11:35:36.000 |
36 |
|
2001-12-09 11:35:39.000 |
39 |
|
2001-12-09 11:35:42.000 |
42 |
|
2001-12-09 11:35:45.000 |
45 |
|
2001-12-09 11:35:48.000 |
48 |
|
2001-12-09 11:35:51.000 |
51 |
|
2001-12-09 11:35:54.000 |
54 |
|
2001-12-09 11:35:57.000 |
57 |
|
2001-12-09 11:36:00.000 |
0 |
|
2001-12-09 11:36:03.000 |
3 |
|
2001-12-09 11:36:06.000 |
6 |
|
2001-12-09 11:36:09.000 |
9 |
|
2001-12-09 11:36:12.000 |
12 |
|
2001-12-09 11:36:15.000 |
15 |
|
2001-12-09 11:36:18.000 |
18 |
|
2001-12-09 11:36:21.000 |
21 |
|
2001-12-09 11:36:24.000 |
24 |
|
2001-12-09 11:36:27.000 |
27 |
|
2001-12-09 11:36:30.000 |
30 |
|
2001-12-09 11:36:33.000 |
33 |
|
2001-12-09 11:36:36.000 |
36 |
|
2001-12-09 11:36:39.000 |
39 |
|
2001-12-09 11:36:42.000 |
42 |
|
2001-12-09 11:36:45.000 |
45 |
|
2001-12-09 11:36:48.000 |
48 |
|
2001-12-09 11:36:51.000 |
51 |
|
2001-12-09 11:36:54.000 |
54 |
|
2001-12-09 11:36:57.000 |
57 |
|
2001-12-09 11:37:00.000 |
0 |