# \[Basic Question\] the measurement deletion still keep the old field name

**URL:** <https://community.influxdata.com/t/basic-question-the-measurement-deletion-still-keep-the-old-field-name/6757>\
**Category:** Systems\
**Tags:** influxdb\
**Created:** [September 25, 2018, 10:17pm UTC](https://community.influxdata.com/t/basic-question-the-measurement-deletion-still-keep-the-old-field-name/6757 "2018-09-25T22:17:21Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![peter-zyj](https://avatars.discourse-cdn.com/v4/letter/p/f1d935/32.png) [@peter-zyj](https://community.influxdata.com/u/peter-zyj)\
**Post date:** [September 25, 2018, 10:17pm UTC](https://community.influxdata.com/t/basic-question-the-measurement-deletion-still-keep-the-old-field-name/6757/1 "2018-09-25T22:17:21Z")

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Hi, Experts

as for the deletion of influxdb measurements, if i want to remove some fields from existing measurement in order to make the measurement looks simple and clean. but it seems not possible

```
> insert test,type="b" val=2 1504225728000123456
> select * from test
name: test
time caseAuthor caseName caseResult type val value
---- ---------- -------- ---------- ---- --- -----
2017-09-01T00:28:48.000123456Z "b" 2   
> 

```

the old field name caseName and caseAuthor still there, I guess maybe i did not delete correctly by  
`Drop series from test`

anyone could explain that to me

thanks  
/Yijun

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**Author:** ![samaust](https://sea1.discourse-cdn.com/flex023/user_avatar/community.influxdata.com/samaust/32/867_2.png) [@samaust](https://community.influxdata.com/u/samaust)\
**Post date:** [September 28, 2018, 2:46am UTC](https://community.influxdata.com/t/basic-question-the-measurement-deletion-still-keep-the-old-field-name/6757/2 "2018-09-28T02:46:05Z")

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I think you might need to drop a shard. Others could confirm.

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<div class="post-metadata">

**Author:** ![peter-zyj](https://avatars.discourse-cdn.com/v4/letter/p/f1d935/32.png) [@peter-zyj](https://community.influxdata.com/u/peter-zyj)\
**Post date:** [October 15, 2018, 6:52pm UTC](https://community.influxdata.com/t/basic-question-the-measurement-deletion-still-keep-the-old-field-name/6757/3 "2018-10-15T18:52:41Z")

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thanks for your help, Yes, probably del Shard could help to remove all the information,  
but not sure whether there is other way to cleanuo without Shard operation