Reference documentation and code samples for the Google Bigtable v2 API class Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount.
Computes an approximate unique count over the input values. When using
raw data as input, be careful to use a consistent encoding. Otherwise
the same value encoded differently could count more than once, or two
distinct values could count as identical.
Input: Any, or omit for Raw
State: TBD
Special state conversions: Int64 (the unique count estimate)
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-12 UTC."],[[["\u003cp\u003eThe latest version available for the \u003ccode\u003eHyperLogLogPlusPlusUniqueCount\u003c/code\u003e class within the Google Bigtable V2 API is 3.17.0.\u003c/p\u003e\n"],["\u003cp\u003eThis class, \u003ccode\u003eType.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount\u003c/code\u003e, is designed to compute an approximate unique count of input values in Google Bigtable.\u003c/p\u003e\n"],["\u003cp\u003eThe documentation provides reference for multiple versions of the \u003ccode\u003eHyperLogLogPlusPlusUniqueCount\u003c/code\u003e class, spanning from version 2.2.0 up to the latest 3.17.0.\u003c/p\u003e\n"],["\u003cp\u003eThe class implements several interfaces, including \u003ccode\u003eIMessage\u003c/code\u003e, \u003ccode\u003eIEquatable\u003c/code\u003e, \u003ccode\u003eIDeepCloneable\u003c/code\u003e, and \u003ccode\u003eIBufferMessage\u003c/code\u003e, in addition to inheriting from the base \u003ccode\u003eobject\u003c/code\u003e class.\u003c/p\u003e\n"]]],[],null,["# Google Bigtable v2 API - Class Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount (3.23.0)\n\nVersion latestkeyboard_arrow_down\n\n- [3.23.0 (latest)](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.22.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.22.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.21.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.21.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.20.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.20.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.19.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.19.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.18.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.18.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.17.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.17.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.16.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.16.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.15.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.15.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.14.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.14.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.13.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.13.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.12.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.12.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.11.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.11.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.10.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.10.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.9.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.9.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.8.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.8.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.7.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.7.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.6.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.6.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.5.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.5.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.4.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.4.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.3.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.3.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.2.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.2.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.1.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.1.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [3.0.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/3.0.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [2.6.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/2.6.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [2.5.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/2.5.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [2.4.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/2.4.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [2.3.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/2.3.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount)\n- [2.2.0](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/2.2.0/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount) \n\n public sealed class Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount : IMessage\u003cType.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount\u003e, IEquatable\u003cType.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount\u003e, IDeepCloneable\u003cType.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount\u003e, IBufferMessage, IMessage\n\nReference documentation and code samples for the Google Bigtable v2 API class Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount.\n\nComputes an approximate unique count over the input values. When using\nraw data as input, be careful to use a consistent encoding. Otherwise\nthe same value encoded differently could count more than once, or two\ndistinct values could count as identical.\nInput: Any, or omit for Raw\nState: TBD\nSpecial state conversions: `Int64` (the unique count estimate) \n\nInheritance\n-----------\n\n[object](https://learn.microsoft.com/dotnet/api/system.object) \\\u003e Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount \n\nImplements\n----------\n\n[IMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IMessage-1.html)[Type](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type)[Types](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types)[Aggregate](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate)[Types](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types)[HyperLogLogPlusPlusUniqueCount](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount), [IEquatable](https://learn.microsoft.com/dotnet/api/system.iequatable-1)[Type](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type)[Types](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types)[Aggregate](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate)[Types](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types)[HyperLogLogPlusPlusUniqueCount](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount), [IDeepCloneable](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IDeepCloneable-1.html)[Type](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type)[Types](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types)[Aggregate](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate)[Types](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types)[HyperLogLogPlusPlusUniqueCount](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2.Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount), [IBufferMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IBufferMessage.html), [IMessage](https://cloud.google.com/dotnet/docs/reference/Google.Protobuf/latest/Google.Protobuf.IMessage.html) \n\nInherited Members\n-----------------\n\n[object.GetHashCode()](https://learn.microsoft.com/dotnet/api/system.object.gethashcode) \n[object.GetType()](https://learn.microsoft.com/dotnet/api/system.object.gettype) \n[object.ToString()](https://learn.microsoft.com/dotnet/api/system.object.tostring)\n\nNamespace\n---------\n\n[Google.Cloud.Bigtable.V2](/dotnet/docs/reference/Google.Cloud.Bigtable.V2/latest/Google.Cloud.Bigtable.V2)\n\nAssembly\n--------\n\nGoogle.Cloud.Bigtable.V2.dll\n\nConstructors\n------------\n\n### HyperLogLogPlusPlusUniqueCount()\n\n public HyperLogLogPlusPlusUniqueCount()\n\n### HyperLogLogPlusPlusUniqueCount(HyperLogLogPlusPlusUniqueCount)\n\n public HyperLogLogPlusPlusUniqueCount(Type.Types.Aggregate.Types.HyperLogLogPlusPlusUniqueCount other)"]]
