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Aggregate Functions
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2021-03-09 00:08:08
Introduction
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Aggregate Functions
Introduction
Reference
count
min
max
sum
avg
any
stddevPop
stddevSamp
varPop(x)
varSamp
covarPop
covarSamp
anyHeavy
anyLast
argMin
argMax
avgWeighted
corr
topK
topKWeighted
groupArray
groupUniqArray
groupArrayInsertAt
groupArrayMovingSum
groupArrayMovingAvg
groupArraySample
groupBitAnd
groupBitOr
groupBitXor
groupBitmap
groupBitmapAnd
groupBitmapOr
groupBitmapXor
sumWithOverflow
deltaSum
sumMap
minMap
maxMap
initializeAggregation
skewPop
skewSamp
kurtPop
kurtSamp
uniq
uniqExact
uniqCombined
uniqCombined64
uniqHLL12
quantile
quantiles
quantileExact
quantileExactWeighted
quantileTiming
quantileTimingWeighted
quantileDeterministic
quantileTDigest
quantileTDigestWeighted
simpleLinearRegression
stochasticLinearRegression
stochasticLogisticRegression
categoricalInformationValue
studentTTest
welchTTest
mannWhitneyUTest
median
rankCorr
Combinators
Parametric
Table Functions
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file
merge
numbers
remote
url
mysql
jdbc
odbc
hdfs
s3
input
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cluster
view
null function
Dictionaries
Introduction
External Dictionaries
General Description
Configuring an External Dictionary
Storing Dictionaries in Memory
Dictionary Updates
Sources of External Dictionaries
Dictionary Key and Fields
Hierarchical dictionaries
Polygon Dictionaries With Grids
Internal Dictionaries
Data Types
Introduction
UInt8, UInt16, UInt32, UInt64, UInt256, Int8, Int16, Int32, Int64, Int128, Int256
Float32, Float64
Decimal
Boolean
String
FixedString(N)
UUID
Date
DateTime
DateTime64
Enum
LowCardinality
Array(T)
AggregateFunction
Nested Data Structures
Nested(Name1 Type1, Name2 Type2, …)
Tuple(T1, T2, …)
Nullable
Special Data Types
Expression
Set
Nothing
Interval
Domains
Overview
IPv4
IPv6
Multiword Type Names
Geo
Map(key, value)
SimpleAggregateFunction
Operators
Operators
IN Operators
ANSI Compatibility
Window Functions
Window Functions
Guides
Overview
Applying CatBoost Models
Operations
Introduction
Requirements
Monitoring
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ClickHouse Upgrade
Access Control and Account Management
External User Authenticators and Directories
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LDAP
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Optimizing Performance
Query Profiling
System Tables
System Tables
system.asynchronous_metric_log
system.asynchronous_metrics
system.clusters
system.columns
system.contributors
system.crash_log
system.current_roles
system.data_type_families
system.databases
system.detached_parts
system.dictionaries
system.disks
system.distributed_ddl_queue
system.distribution_queue
system.enabled_roles
system.errors
system.events
system.functions
system.grants
system.graphite_retentions
system.licenses
system.merge_tree_settings
system.merges
system.metric_log
system.metrics
system.mutations
system.numbers
system.numbers_mt
system.one
system.opentelemetry_span_log
system.part_log
system.parts
system.parts_columns
system.processes
system.query_log
system.query_thread_log
system.quota_limits
system.quota_usage
system.quotas
system.quotas_usage
system.replicas
system.replicated_fetches
system.replication_queue
system.role_grants
system.roles
system.row_policies
system.settings
system.settings_profile_elements
system.settings_profiles
system.stack_trace
system.storage_policies
system.table_engines
system.tables
system.text_log
system.time_zones
system.trace_log
system.users
system.zookeeper
Server Configuration Parameters
Introduction
Server Settings
Testing Hardware
Settings
Introduction
Permissions for Queries
Restrictions on Query Complexity
Settings Profiles
Constraints on Settings
User Settings
MergeTree tables settings
Settings
Utilities
Overview
clickhouse-copier
clickhouse-local
clickhouse-benchmark
ClickHouse compressor
ClickHouse obfuscator
clickhouse-odbc-bridge
Usage Recommendations
OpenTelemetry Support
Caches
Development
For Beginners
Architecture Overview
Continuous Integration Checks
Build on Linux
Build on Mac OS X
Build on Linux for Mac OS X
Build on Linux for AARCH64 (ARM64)
C++ Guide
Testing
Third-Party Libraries Used
Source Code Browser
CMake in ClickHouse
How to add test queries to ClickHouse CI
Commercial
Cloud
Support
Introduction
F.A.Q.
General
Why ClickHouse is so fast?
Who is using ClickHouse?
What does “ClickHouse” mean?
What does “Не тормозит” mean?
What is OLAP?
What is a columnar database?
Why not use something like MapReduce?
Use Cases
Can I use ClickHouse as a time-series database?
Can I use ClickHouse as a key-value storage?
Operations
Which ClickHouse version to use in production?
Is it possible to delete old records from a ClickHouse table?
Integration
How do I export data from ClickHouse to a file?
How to import JSON into ClickHouse?
What if I have a problem with encodings when connecting to Oracle via ODBC?
What’s New
Changelog
2021
2020
2019
2018
2017
Roadmap
Security Changelog
What’s New in ClickHouse?
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