# queryTagHistory for a Boolean Tag CountOn **URL:** \ **Category:** Ignition\ **Tags:** ignition79, scripting\ **Created:** [February 7, 2018, 9:31pm UTC](https://forum.inductiveautomation.com/t/querytaghistory-for-a-boolean-tag-counton/16919 "2018-02-07T21:31:06Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![bfuson](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/bfuson/32/4597_2.png) [@bfuson](https://forum.inductiveautomation.com/u/bfuson)\ **Post date:** [February 7, 2018, 9:31pm UTC](https://forum.inductiveautomation.com/t/querytaghistory-for-a-boolean-tag-counton/16919/1 "2018-02-07T21:31:06Z")
I have a Boolean OPC Tag that’s tracked by the Historian. I’d like to get the number of times the tag turned on during a time period. Seems like it should be a relatively simple operation with: ```auto result = system.tag.queryTagHistory(paths=[tagPath], startDate=startDate, endDate=endDate, aggregationModes=['CountOn'], columnNames=['t','total'], noInterpolation=True) ``` Which I would expect to return a single row, with one cell being the integer total number of transitions. But instead I get this: ```auto Row | t total --------------------------- 0 | Wed Feb 07 15:24:06 EST 2018 0 1 | Wed Feb 07 15:24:16 EST 2018 0 2 | Wed Feb 07 15:35:16 EST 2018 0 3 | Wed Feb 07 15:35:26 EST 2018 0 4 | Wed Feb 07 15:45:17 EST 2018 0 5 | Wed Feb 07 15:45:27 EST 2018 0 6 | Wed Feb 07 15:45:37 EST 2018 0 7 | Wed Feb 07 15:45:47 EST 2018 1 8 | Wed Feb 07 15:49:47 EST 2018 0 9 | Wed Feb 07 15:49:57 EST 2018 1 10 | Wed Feb 07 15:57:27 EST 2018 1 11 | Wed Feb 07 15:57:37 EST 2018 0 12 | Wed Feb 07 15:57:47 EST 2018 1 13 | Wed Feb 07 16:01:37 EST 2018 1 ``` What am I doing wrong? ---
**Author:** ![accyroy](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/accyroy/32/3386_2.png) [@accyroy](https://forum.inductiveautomation.com/u/accyroy)\ **Post date:** [February 8, 2018, 10:23am UTC](https://forum.inductiveautomation.com/t/querytaghistory-for-a-boolean-tag-counton/16919/2 "2018-02-08T10:23:15Z")
You just need to add returnSize = 1 into your call. ```auto result = system.tag.queryTagHistory(paths=[tagPath], startDate=startDate, endDate=endDate, aggregationModes=['CountOn'], returnSize = 1, columnNames=['t','total'], noInterpolation=True) ```