# SummaryColumnIDs The summary data frame column identifiers. ``` enum SummaryColumnIDs ``` ## Topics ### Type Properties [`static let columnName: ColumnID`](/documentation/TabularData/SummaryColumnIDs/columnName) The identifier that represents the summary’s column that contains the column names in a data frame. [`static let firstQuartile: ColumnID`](/documentation/TabularData/SummaryColumnIDs/firstQuartile) The identifier that represents the summary’s column of first quartiles. [`static let maximum: ColumnID`](/documentation/TabularData/SummaryColumnIDs/maximum) The identifier that represents the summary’s column of maximums. [`static let mean: ColumnID`](/documentation/TabularData/SummaryColumnIDs/mean) The identifier that represents the summary’s column of arithmetic means. [`static let median: ColumnID`](/documentation/TabularData/SummaryColumnIDs/median) The identifier that represents the summary’s column of medians. [`static let minimum: ColumnID`](/documentation/TabularData/SummaryColumnIDs/minimum) The identifier that represents the summary’s column of minimums. [`static let mode: ColumnID<[Any]>`](/documentation/TabularData/SummaryColumnIDs/mode) The identifier that represents the summary’s column of most frequent elements. [`static let noneCount: ColumnID`](/documentation/TabularData/SummaryColumnIDs/noneCount) The identifier that represents the summary’s column of missing counts. [`static let someCount: ColumnID`](/documentation/TabularData/SummaryColumnIDs/someCount) The identifier that represents the summary’s column of non-missing counts. [`static let standardDeviation: ColumnID`](/documentation/TabularData/SummaryColumnIDs/standardDeviation) The identifier that represents the summary’s column of standard deviations. [`static let thirdQuartile: ColumnID`](/documentation/TabularData/SummaryColumnIDs/thirdQuartile) The identifier that represents the summary’s column of third quartiles. [`static let uniqueCount: ColumnID`](/documentation/TabularData/SummaryColumnIDs/uniqueCount) The identifier that represents the summary’s column of unique counts. ## Relationships ### Conforms To [`Sendable`](/documentation/Swift/Sendable) [`SendableMetatype`](/documentation/Swift/SendableMetatype) --- Copyright © 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)