# Column Operations

> For the complete documentation index, see [llms.txt](https://kotlin.github.io/dataframe/llms.txt).

* [statistics](columnstatistics.html) — summary statistics ([sum](sum.html), [mean](mean.html), etc.) and cumulative statistics ([cumSum](cumsum.html), etc.)

* [asIterable](asiterable.html) — returns values of [DataColumn](datacolumn.html) as [Iterable](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.collections/-iterable/)

* [asSequence](assequencecolumn.html) — returns values of [DataColumn](datacolumn.html) as [Sequence](https://kotlinlang.org/api/core/kotlin-stdlib/kotlin.sequences/-sequence/)

* [between](between.html) — returns a Boolean [DataColumn](datacolumn.html) indicating whether each value lies between two bounds

* [first](firstoncolumn.html) — returns the first value in a [DataColumn](datacolumn.html)

* [last](lastoncolumn.html) — returns the last value in a [DataColumn](datacolumn.html)

* [single](singleoncolumn.html) — returns the single value in a [DataColumn](datacolumn.html)

API reference: [api package](https://kotlin.github.io/dataframe/api-docs/core/org.jetbrains.kotlinx.dataframe.api/index.html)