# Unable to see tag history in database

**URL:** <https://forum.inductiveautomation.com/t/unable-to-see-tag-history-in-database/17405>\
**Category:** Module Development\
**Created:** [March 18, 2018, 6:30pm UTC](https://forum.inductiveautomation.com/t/unable-to-see-tag-history-in-database/17405 "2018-03-18T18:30:08Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![zhailujun123](https://avatars.discourse-cdn.com/v4/letter/z/71c47a/32.png) [@zhailujun123](https://forum.inductiveautomation.com/u/zhailujun123)\
**Post date:** [March 18, 2018, 6:30pm UTC](https://forum.inductiveautomation.com/t/unable-to-see-tag-history-in-database/17405/1 "2018-03-18T18:30:08Z")

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there is a problem with Tag historian. When I create a tag, for example memory Tag A , and then configure the tag history parameter, and store the Tag history in DB , the rest of parameters keep default. (DB has been connected in Gateway configuration). I changed the Tag A’s Value to see how it stored in DB.

So I wen to Tools\> Database QueryBrowser\>history table. But I did not found the Tag A column.

Any insight would be appreciated! Thanks!

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [March 18, 2018, 11:57pm UTC](https://forum.inductiveautomation.com/t/unable-to-see-tag-history-in-database/17405/2 "2018-03-18T23:57:33Z")

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The tag historian doesn’t make a column for every tag being recorded. It records everything in one table in the intValue, or floatValue, or stringValue column, with a tagID to identify what it belongs to. Which is why should never query those tables yourself – always use the tag history binding or the system.tag.\* script functions.