Table.ColumnNames
A
- AccessControlEntry.ConditionToIdentities
- Access.Database
- ActiveDirectory.Domains
- AdobeAnalytics.Cubes
- AdoDotNet.DataSource
- AdoDotNet.Query
- AnalysisServices.Database
- AnalysisServices.Databases
- AzureStorage.BlobContents
- AzureStorage.Blobs
- AzureStorage.DataLake
- AzureStorage.DataLakeContents
- AzureStorage.Tables
B
- BinaryFormat.Binary
- BinaryFormat.Byte
- BinaryFormat.ByteOrder
- BinaryFormat.Choice
- BinaryFormat.Decimal
- BinaryFormat.Double
- BinaryFormat.Group
- BinaryFormat.Length
- BinaryFormat.List
- BinaryFormat.Null
- BinaryFormat.Record
- BinaryFormat.SignedInteger16
- BinaryFormat.SignedInteger32
- BinaryFormat.SignedInteger64
- BinaryFormat.Single
- BinaryFormat.Text
- BinaryFormat.Transform
- BinaryFormat.UnsignedInteger16
- BinaryFormat.UnsignedInteger32
- BinaryFormat.UnsignedInteger64
- BinaryFormat.7BitEncodedSignedInteger
- BinaryFormat.7BitEncodedUnsignedInteger
- Binary data
- Binary.ApproximateLength
- Binary.Buffer
- Binary.Combine
- Binary.Compress
- Binary.Decompress
- Binary.From
- Binary.FromList
- Binary.FromText
- Binary.InferContentType
- Binary.Length
- Binary.Range
- Binary.Split
- Binary.ToList
- Binary.ToText
- Binary.View
- Binary.ViewError
- Binary.ViewFunction
- Byte.From
C
- Cdm.Contents
- Character.FromNumber
- Character.ToNumber
- Combiner.CombineTextByDelimiter
- Combiner.CombineTextByEachDelimiter
- Combiner.CombineTextByLengths
- Combiner.CombineTextByPositions
- Combiner.CombineTextByRanges
- Comparer.FromCulture
- Comparer.Ordinal
- Comparer.OrdinalIgnoreCase
- Controlling byte order
- Csv.Document
- Cube.AddAndExpandDimensionColumn
- Cube.AddMeasureColumn
- Cube.ApplyParameter
- Cube.AttributeMemberId
- Cube.AttributeMemberProperty
- Cube.CollapseAndRemoveColumns
- Cube.Dimensions
- Cube.DisplayFolders
- Cube.MeasureProperties
- Cube.MeasureProperty
- Cube.Measures
- Cube.Parameters
- Cube.Properties
- Cube.PropertyKey
- Cube.ReplaceDimensions
- Cube.Transform
- Currency.From
D
- DateTime.AddZone
- DateTime.Date
- DateTime.FixedLocalNow
- DateTime.From
- DateTime.FromFileTime
- DateTime.FromText
- DateTime.IsInCurrentHour
- DateTime.IsInCurrentMinute
- DateTime.IsInCurrentSecond
- DateTime.IsInNextHour
- DateTime.IsInNextMinute
- DateTime.IsInNextNHours
- DateTime.IsInNextNMinutes
- DateTime.IsInNextNSeconds
- DateTime.IsInNextSecond
- DateTime.IsInPreviousHour
- DateTime.IsInPreviousMinute
- DateTime.IsInPreviousNHours
- DateTime.IsInPreviousNMinutes
- DateTime.IsInPreviousNSeconds
- DateTime.IsInPreviousSecond
- DateTime.LocalNow
- DateTime.Time
- DateTime.ToRecord
- DateTime.ToText
- Date.AddDays
- Date.AddMonths
- Date.AddQuarters
- Date.AddWeeks
- Date.AddYears
- Date.Day
- Date.DayOfWeek
- Date.DayOfWeekName
- Date.DayOfYear
- Date.DaysInMonth
- Date.EndOfDay
- Date.EndOfMonth
- Date.EndOfQuarter
- Date.EndOfWeek
- Date.EndOfYear
- Date.From
- Date.FromText
- Date.IsInCurrentDay
- Date.IsInCurrentMonth
- Date.IsInCurrentQuarter
- Date.IsInCurrentWeek
- Date.IsInCurrentYear
- Date.IsInNextDay
- Date.IsInNextMonth
- Date.IsInNextNDays
- Date.IsInNextNMonths
- Date.IsInNextNQuarters
- Date.IsInNextNWeeks
- Date.IsInNextNYears
- Date.IsInNextQuarter
- Date.IsInNextWeek
- Date.IsInNextYear
- Date.IsInPreviousDay
- Date.IsInPreviousMonth
- Date.IsInPreviousNDays
- Date.IsInPreviousNMonths
- Date.IsInPreviousNQuarters
- Date.IsInPreviousNWeeks
- Date.IsInPreviousNYears
- Date.IsInPreviousQuarter
- Date.IsInPreviousWeek
- Date.IsInPreviousYear
- Date.IsInYearToDate
- Date.IsLeapYear
- Date.Month
- Date.MonthName
- Date.QuarterOfYear
- Date.StartOfDay
- Date.StartOfMonth
- Date.StartOfQuarter
- Date.StartOfWeek
- Date.StartOfYear
- Date.ToRecord
- Date.ToText
- Date.WeekOfMonth
- Date.WeekOfYear
- Date.Year
- DB2.Database
- Decimal.From
- Diagnostics.ActivityId
- Diagnostics.Trace
- DirectQueryCapabilities.From
- Double.From
- Duration.Days
- Duration.From
- Duration.FromText
- Duration.Hours
- Duration.Minutes
- Duration.Seconds
- Duration.ToRecord
- Duration.TotalDays
- Duration.TotalHours
- Duration.TotalMinutes
- Duration.TotalSeconds
- Duration.ToText
E
F
G
H
I
L
- Lines.FromBinary
- Lines.FromText
- Lines.ToBinary
- Lines.ToText
- List.Accumulate
- List.AllTrue
- List.Alternate
- List.AnyTrue
- List.Average
- List.Buffer
- List.Combine
- List.ConformToPageReader
- List.Contains
- List.ContainsAll
- List.ContainsAny
- List.Count
- List.Covariance
- List.Dates
- List.DateTimes
- List.DateTimeZones
- List.Difference
- List.Distinct
- List.Durations
- List.FindText
- List.First
- List.FirstN
- List.Generate
- List.InsertRange
- List.Intersect
- List.IsDistinct
- List.IsEmpty
- List.Last
- List.LastN
- List.MatchesAll
- List.MatchesAny
- List.Max
- List.MaxN
- List.Median
- List.Min
- List.MinN
- List.Mode
- List.Modes
- List.NonNullCount
- List.Numbers
- List.Percentile
- List.PositionOf
- List.PositionOfAny
- List.Positions
- List.Product
- List.Random
- List.Range
- List.RemoveFirstN
- List.RemoveItems
- List.RemoveLastN
- List.RemoveMatchingItems
- List.RemoveNulls
- List.RemoveRange
- List.Repeat
- List.ReplaceMatchingItems
- List.ReplaceRange
- List.ReplaceValue
- List.Reverse
- List.Select
- List.Single
- List.SingleOrDefault
- List.Skip
- List.Sort
- List.Split
- List.StandardDeviation
- List.Sum
- List.Times
- List.Transform
- List.TransformMany
- List.Union
- List.Zip
- Logical.From
- Logical.FromText
- Logical.ToText
N
- Name
- Number.Abs
- Number.Acos
- Number.Asin
- Number.Atan
- Number.Atan2
- Number.BitwiseAnd
- Number.BitwiseNot
- Number.BitwiseOr
- Number.BitwiseShiftLeft
- Number.BitwiseShiftRight
- Number.BitwiseXor
- Number.Combinations
- Number.Cos
- Number.Cosh
- Number.Exp
- Number.Factorial
- Number.From
- Number.FromText
- Number.IntegerDivide
- Number.IsEven
- Number.IsNaN
- Number.IsOdd
- Number.Ln
- Number.Log
- Number.Log10
- Number.Mod
- Number.Permutations
- Number.Power
- Number.Random
- Number.RandomBetween
- Number.Round
- Number.RoundAwayFromZero
- Number.RoundDown
- Number.RoundTowardZero
- Number.RoundUp
- Number.Sign
- Number.Sin
- Number.Sinh
- Number.Sqrt
- Number.Tan
- Number.Tanh
- Number.ToText
O
P
R
- RData.FromBinary
- Record.AddField
- Record.Combine
- Record.Field
- Record.FieldCount
- Record.FieldNames
- Record.FieldOrDefault
- Record.FieldValues
- Record.FromList
- Record.FromTable
- Record.HasFields
- Record.RemoveFields
- Record.RenameFields
- Record.ReorderFields
- Record.SelectFields
- Record.ToList
- Record.ToTable
- Record.TransformFields
- Replacer.ReplaceText
- Replacer.ReplaceValue
- RowExpression.Column
- RowExpression.From
- RowExpression.Row
S
- Salesforce.Data
- Salesforce.Reports
- SapBusinessWarehouse.Cubes
- SapHana.Database
- SharePoint.Contents
- SharePoint.Files
- SharePoint.Tables
- Single.From
- Soda.Feed
- Splitter.SplitByNothing
- Splitter.SplitTextByAnyDelimiter
- Splitter.SplitTextByCharacterTransition
- Splitter.SplitTextByDelimiter
- Splitter.SplitTextByEachDelimiter
- Splitter.SplitTextByLengths
- Splitter.SplitTextByPositions
- Splitter.SplitTextByRanges
- Splitter.SplitTextByRepeatedLengths
- Splitter.SplitTextByWhitespace
- SqlExpression.SchemaFrom
- SqlExpression.ToExpression
- Sql.Database
- Sql.Databases
- Sybase.Database
T
- Tables.GetRelationships
- Table.AddColumn
- Table.AddFuzzyClusterColumn
- Table.AddIndexColumn
- Table.AddJoinColumn
- Table.AddKey
- Table.AddRankColumn
- Table.AggregateTableColumn
- Table.AlternateRows
- Table.ApproximateRowCount
- Table.Buffer
- Table.Column
- Table.ColumnCount
- Table.ColumnNames
- Table.ColumnsOfType
- Table.Combine
- Table.CombineColumns
- Table.CombineColumnsToRecord
- Table.ConformToPageReader
- Table.Contains
- Table.ContainsAll
- Table.ContainsAny
- Table.DemoteHeaders
- Table.Distinct
- Table.DuplicateColumn
- Table.ExpandListColumn
- Table.ExpandRecordColumn
- Table.ExpandTableColumn
- Table.FillDown
- Table.FillUp
- Table.FilterWithDataTable
- Table.FindText
- Table.First
- Table.FirstN
- Table.FirstValue
- Table.FromColumns
- Table.FromList
- Table.FromPartitions
- Table.FromRecords
- Table.FromRows
- Table.FromValue
- Table.FuzzyGroup
- Table.FuzzyJoin
- Table.FuzzyNestedJoin
- Table.Group
- Table.HasColumns
- Table.InsertRows
- Table.IsDistinct
- Table.IsEmpty
- Table.Join
- Table.Keys
- Table.Last
- Table.LastN
- Table.MatchesAllRows
- Table.MatchesAnyRows
- Table.Max
- Table.MaxN
- Table.Min
- Table.MinN
- Table.NestedJoin
- Table.Partition
- Table.PartitionValues
- Table.Pivot
- Table.PositionOf
- Table.PositionOfAny
- Table.PrefixColumns
- Table.Profile
- Table.PromoteHeaders
- Table.Range
- Table.RemoveColumns
- Table.RemoveFirstN
- Table.RemoveLastN
- Table.RemoveMatchingRows
- Table.RemoveRows
- Table.RemoveRowsWithErrors
- Table.RenameColumns
- Table.ReorderColumns
- Table.Repeat
- Table.ReplaceErrorValues
- Table.ReplaceKeys
- Table.ReplaceMatchingRows
- Table.ReplaceRelationshipIdentity
- Table.ReplaceRows
- Table.ReplaceValue
- Table.ReverseRows
- Table.RowCount
- Table.Schema
- Table.SelectColumns
- Table.SelectRows
- Table.SelectRowsWithErrors
- Table.SingleRow
- Table.Skip
- Table.Sort
- Table.Split
- Table.SplitAt
- Table.SplitColumn
- Table.ToColumns
- Table.ToList
- Table.ToRecords
- Table.ToRows
- Table.TransformColumnNames
- Table.TransformColumns
- Table.TransformColumnTypes
- Table.TransformRows
- Table.Transpose
- Table.Unpivot
- Table.UnpivotOtherColumns
- Table.View
- Table.ViewError
- Table.ViewFunction
- Teradata.Database
- Text.AfterDelimiter
- Text.At
- Text.BeforeDelimiter
- Text.BetweenDelimiters
- Text.Combine
- Text.Contains
- Text.End
- Text.EndsWith
- Text.From
- Text.FromBinary
- Text.InferNumberType
- Text.Insert
- Text.Length
- Text.Lower
- Text.Middle
- Text.NewGuid
- Text.PadEnd
- Text.PadStart
- Text.PositionOf
- Text.PositionOfAny
- Text.Proper
- Text.Range
- Text.Remove
- Text.RemoveRange
- Text.Repeat
- Text.Replace
- Text.ReplaceRange
- Text.Reverse
- Text.Select
- Text.Split
- Text.SplitAny
- Text.Start
- Text.StartsWith
- Text.ToBinary
- Text.ToList
- Text.Trim
- Text.TrimEnd
- Text.TrimStart
- Text.Upper
- Time.EndOfHour
- Time.From
- Time.FromText
- Time.Hour
- Time.Minute
- Time.Second
- Time.StartOfHour
- Time.ToRecord
- Time.ToText
- Transform operations
- Trigonometry
- Type.AddTableKey
- Type.ClosedRecord
- Type.Facets
- Type.ForFunction
- Type.ForRecord
- Type.FunctionParameters
- Type.FunctionRequiredParameters
- Type.FunctionReturn
- Type.Is
- Type.IsNullable
- Type.IsOpenRecord
- Type.ListItem
- Type.NonNullable
- Type.OpenRecord
- Type.RecordFields
- Type.ReplaceFacets
- Type.ReplaceTableKeys
- Type.TableColumn
- Type.TableKeys
- Type.TableRow
- Type.TableSchema
- Type.Union
V
- Value.Add
- Value.Alternates
- Value.As
- Value.Compare
- Value.Divide
- Value.Equals
- Value.Expression
- Value.Firewall
- Value.FromText
- Value.Is
- Value.Lineage
- Value.Metadata
- Value.Multiply
- Value.NativeQuery
- Value.NullableEquals
- Value.Optimize
- Value.RemoveMetadata
- Value.ReplaceMetadata
- Value.ReplaceType
- Value.Subtract
- Value.Traits
- Value.Type
- Value.VersionIdentity
- Value.Versions
- Value.ViewError
- Value.ViewFunction
- Variable.Value
In this article, we will take an in-depth look at the M code behind the Table.ColumnNames function and explore how it works.
Understanding the Table.ColumnNames Function
The Table.ColumnNames function is a simple but powerful function that returns a list of column names for a given table. The function takes a single parameter, which is the name of the table that you want to retrieve the column names for. Here is the syntax for the Table.ColumnNames function:
Table.ColumnNames(table as table) as list
The function returns a list of column names for the specified table. Here is an example of how to use the Table.ColumnNames function in Power Query:
let
Source = Excel.Workbook(File.Contents("C:MyWorkbook.xlsx"), null, true),
Sheet1_Sheet = Source{[Item="Sheet1",Kind="Sheet"]}[Data],
#"Promoted Headers" = Table.PromoteHeaders(Sheet1_Sheet, [PromoteAllScalars=true]),
ColumnNames = Table.ColumnNames(#"Promoted Headers")
in
ColumnNames
In this example, we are using the Table.ColumnNames function to retrieve a list of column names for a table that we have loaded from an Excel workbook. We are first loading the workbook using the Excel.Workbook function, and then selecting the Sheet1 worksheet using the Source{[Item=”Sheet1″,Kind=”Sheet”]}[Data] syntax. We are then promoting the headers of the table using the Table.PromoteHeaders function, and then using the Table.ColumnNames function to retrieve a list of column names for the resulting table.
The M Code Behind the Table.ColumnNames Function
The M code behind the Table.ColumnNames function is fairly simple and straightforward. Here is the M code for the Table.ColumnNames function:
(table as table) =>
let
ColumnNames = Table.ColumnNames(table)
in
ColumnNames
As you can see, the function takes a single parameter, which is the table that you want to retrieve the column names for. The function then uses the Table.ColumnNames function to retrieve a list of column names for the specified table. Finally, the function returns the list of column names as the result.
In this article, we have explored the M code behind the Table.ColumnNames function in Power Query. We have seen that the function is a simple but powerful function that can be used to retrieve a list of column names for a given table. We have also seen how to use the function in Power Query, and how to work with the M code behind the function.
If you are interested in learning more about Power Query and the M language, there are many great resources available online that can help you get started. With a little bit of practice, you can become a Power Query expert and transform your data in ways that you never thought possible.
