我的书签
添加书签
移除书签first() function
Empty tables
|> filter(fn: (r) =>r._measurement == "cpu" and)|> first()
first
- Visualize data
- Process data
- Query data
- Optimize queries
- Query with Flux
- Query SQL data sources
- Moving Average
- First & last
- Monitor states
- Fill
- Median
- Geo-temporal data
- Group
- Window & aggregate
- Sort and limit
- Cumulative sum
- Histograms
- Exists
- Query fields and tags
- Percentile & quantile
- Conditional logic
- Custom functions
- Calculate percentages
- Rate
- Extract scalar values
- Explore your schema
- Regular expressions
- Increase
- Manipulate timestamps
- Transform data with math
- Join
- Get started with Flux
- Common queries
- Query with InfluxQL
- Execute queries
- Account management
- Manage users
- Write data
- Get started
- Tools & integrations
- Telegraf configurations
- Security & authorization
- Back up & restore data
- Upgrade InfluxDB
- Monitor & alert
- Manage organizations
- InfluxDB templates
- Reference
- Command line tools
- influxd
- influxd run
- influxd generate
- influxd inspect
- influxd inspect report-tsi
- influxd inspect dump-tsi
- influxd inspect report-tsm
- influxd inspect verify-wal
- influxd inspect compact-series-file
- influxd inspect build-tsi
- influxd inspect verify-tsm
- influxd inspect export-blocks
- influxd inspect export-index
- influxd inspect dumpwal
- influxd inspect verify-seriesfile
- influxd upgrade
- influxd version
- influx
- influx config
- influx telegrafs
- influx apply
- influx completion
- influx query
- influx transpile
- influx bucket
- influx restore
- influx auth
- influx help
- influx secret
- influx backup
- influx template
- influx setup
- influx export
- influx version
- influx delete
- influx user
- influx task
- influx ping
- influx org
- influx v1
- influx dashboards
- influx stacks
- influx write
- influxd
- InfluxDB v2 API
- Key concepts
- Release notes
- Glossary
- Sample data
- InfluxDB URLs
- Configuration options
- Syntax
- InfluxDB Internals
- Flux language
- Flux specification
- Flux standard library
- InfluxDB Schema
- InfluxDB Tasks
- InfluxDB
- Profiler
- JSON
- Slack
- InfluxDB Secrets
- CSV
- InfluxDB v1
- System
- Regular expressions
- SQL
- Strings
- strings.isUpper
- strings.index
- strings.toTitle
- strings.splitN
- strings.indexAny
- strings.strlen
- strings.countStr
- strings.containsAny
- strings.isDigit
- strings.trimRight
- strings.splitAfter
- strings.substring
- strings.trimPrefix
- strings.hasSuffix
- strings.isLower
- strings.lastIndex
- strings.isLetter
- strings.title
- strings.split
- strings.replaceAll
- strings.compare
- strings.trim
- strings.joinStr
- strings.trimLeft
- strings.trimSuffix
- strings.equalFold
- strings.trimSpace
- strings.containsStr
- strings.repeat
- strings.toLower
- strings.splitAfterN
- strings.replace
- strings.toUpper
- strings.lastIndexAny
- strings.hasPrefix
- Built-in
- Inputs
- Transformations
- fill
- cumulativeSum
- filter
- doubleEMA
- relativeStrengthIndex
- stateCount
- tripleEMA
- pearsonr
- map
- difference
- set
- holtWinters
- rename
- keep
- stateDuration
- tail
- keyValues
- elapsed
- group
- union
- columns
- pivot
- drop
- truncateTimeColumn
- chandeMomentumOscillator
- keys
- range
- join
- Stream & table
- kaufmansAMA
- timeShift
- hourSelection
- tripleExponentialDerivative
- kaufmansER
- Type conversions
- sort
- movingAverage
- cov
- covariance
- derivative
- timedMovingAverage
- Selectors
- duplicate
- histogram
- exponentialMovingAverage
- Aggregates
- limit
- increase
- window
- Outputs
- Tests
- Miscellaneous
- View all functions
- Testing
- Date
- Experimental
- PagerDuty
- Contributed
- InfluxDB Monitor
- Pushbullet
- Runtime
- HTTP
- Math
- math.tan
- math.y0
- math.j1
- math.pow10
- math.abs
- math.asinh
- math.tanh
- math.logb
- math.float64bits
- math.isInf
- math.trunc
- math.sin
- math.atanh
- math.y1
- math.atan2
- math.asin
- math.floor
- math.sinh
- math.ldexp
- math.pow
- math.atan
- math.log2
- math.ilogb
- math.j0
- math.NaN
- math.acosh
- math.lgamma
- math.ceil
- math.mMin
- math.mod
- math.jn
- math.round
- math.log1p
- math.sqrt
- math.erfcinv
- math.log10
- math.exp
- math.remainder
- math.isNaN
- math.copysign
- math.yn
- math.sincos
- math.expm1
- math.hypot
- math.erfc
- math.mMax
- math.modf
- math.cosh
- math.signbit
- math.cos
- math.gamma
- math.log
- math.mInf
- math.exp2
- math.nextafter
- math.dim
- math.erf
- math.acos
- math.erfinv
- math.cbrt
- math.roundtoeven
- math.frexp
- Command line tools
暂无相关搜索结果！
本文档使用 全库网 构建
