add influxdb docs

docs/influxdb.md

@@ -0,0 +1,35 @@
+## 官方文档地址
+    https://docs.influxdata.com/influxdb/v2/reference/cli/influx/delete/
+## 数据删除
+    influx delete --org nannong  --bucket metric --start '1970-01-01T00:00:00Z'  --stop $(date --utc +"%Y-%m-%dT%H:%M:%SZ")  --token "A-ZRjqMK_7NR45lXXEiR7AEtYCd1ETzq9Z61FTMQLb5O4-1hSf8sCrjdPB84e__xsrItKHL3qjJALgbYN-H_VQ=="
+
+## demo
+```text
+    Authentication credentials
+    The examples below assume your InfluxDB host, organization, and token are provided by either the active influx CLI configuration or by environment variables (INFLUX_HOST, INFLUX_ORG, and INFLUX_TOKEN). If you do not have a CLI configuration set up or the environment variables set, include these required credentials for each command with the following flags:
+
+    --host: InfluxDB host
+    -o, --org or --org-id: InfluxDB organization name or ID
+    -t, --token: InfluxDB API token
+
+    Delete all points in a measurement
+    influx delete \
+    --bucket example-bucket \
+    --start 1970-01-01T00:00:00Z \
+    --stop $(date --utc +"%Y-%m-%dT%H:%M:%SZ") \
+    --predicate '_measurement="example-measurement"'
+
+    Delete points in a measurement with a specific tag value
+    influx delete \
+    --bucket example-bucket \
+    --start 1970-01-01T00:00:00Z \
+    --stop $(date --utc +"%Y-%m-%dT%H:%M:%SZ") \
+    --predicate '_measurement="example-measurement" AND host="old-host"'
+
+    Delete all points within a specified time frame
+
+    influx delete \
+    --bucket example-bucket \
+    --start 2020-03-01T00:00:00Z \
+    --stop 2020-11-14T00:00:00Z
+```