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feat(docs): Update manage-database.md (#5603) 

Part three of deletion outside of default retention policy feature request work. This updates the InfluxQL documentation to reflect that a retention policy can now be specified in the `FROM` clause for `DELETE`. 

closes https://github.com/influxdata/feature-requests/issues/175
pull/5597/head^2
WeblWabl 2024-09-19 12:40:07 -05:00 committed by GitHub
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content/influxdb/v1/query_language/manage-database.md
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@ -171,6 +171,11 @@ Delete all data in the database that occur before January 01, 2020:
> DELETE WHERE time < '2020-01-01'
```
Delete all data associated with the measurement `h2o_feet` in retention policy `one_day`:
```
> DELETE FROM "one_day"."h2o_feet"
```
A successful `DELETE` query returns an empty result.
Things to note about `DELETE`:
@ -178,7 +183,8 @@ Things to note about `DELETE`:
* `DELETE` supports
[regular expressions](/influxdb/v1/query_language/explore-data/#regular-expressions)
in the `FROM` clause when specifying measurement names and in the `WHERE` clause
when specifying tag values.
when specifying tag values. It *does not* support regular expressions for the retention policy in the `FROM` clause.
`DELETE` requires that you define *one* retention policy in the `FROM` clause.
* `DELETE` does not support [fields](/influxdb/v1/concepts/glossary/#field) in the `WHERE` clause.
* If you need to delete points in the future, you must specify that time period as `DELETE SERIES` runs for `time < now()` by default. [Syntax](https://github.com/influxdata/influxdb/issues/8007)