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ClickHouse v21.9 Documentation
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SQL Reference

 来源:ClickHouse 浏览 408 扫码 分享 2021-09-30 08:14:50
    • Statements
    • Functions
    • Aggregate Functions
    • Reference
    • Table Functions
    • Dictionaries
    • Data Types
    • Operators
    • Window Functions
    • Window Functions
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    • 书签
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    • Introduction
      • Overview
      • Distinctive Features
      • Performance
      • History
      • Adopters
    • Getting Started
      • Example Datasets
        • Introduction
        • GitHub Events
        • Yandex.Metrica Data
        • Recipes Dataset
        • Star Schema Benchmark
        • WikiStat
        • Terabyte Click Logs from Criteo
        • AMPLab Big Data Benchmark
        • Brown University Benchmark
        • New York Taxi Data
        • OpenSky
        • UK Property Price Paid
        • Cell Towers
        • Menus
        • OnTime
      • Installation
      • Tutorial
      • Playground
    • Interfaces
      • Introduction
      • Command-Line Client
      • Native Interface (TCP)
      • HTTP Interface
      • MySQL Interface
      • Input and Output Formats
      • JDBC Driver
      • ODBC Driver
      • C++ Client Library
      • Third-Party
        • Third-Party Interfaces
        • Client Libraries
        • Integrations
        • Visual Interfaces
        • Proxies
    • Engines
      • Table Engines
        • Integrations
          • Table Engines for Integrations
          • ODBC
          • JDBC
          • MySQL
          • MongoDB
          • HDFS
          • S3
          • SQLite
          • Kafka
          • EmbeddedRocksDB
          • RabbitMQ
          • PostgreSQL
          • ExternalDistributed
          • MaterializedPostgreSQL
          • Introduction
        • MergeTree Family
          • Introduction
          • MergeTree
          • Data Replication
          • Custom Partitioning Key
          • ReplacingMergeTree
          • SummingMergeTree
          • AggregatingMergeTree
          • CollapsingMergeTree
          • VersionedCollapsingMergeTree
          • GraphiteMergeTree
        • Log Family
          • Introduction
          • StripeLog
          • Log
          • TinyLog
        • Special
          • Special Table Engines
          • Distributed
          • Dictionary
          • Merge
          • File
          • Null
          • Set
          • Join
          • URL
          • View
          • MaterializedView
          • Memory
          • Buffer
          • External Data
          • GenerateRandom
      • Database Engines
        • Introduction
        • MaterializedMySQL
        • MaterializedPostgreSQL
        • MySQL
        • Lazy
        • Atomic
        • SQLite
        • PostgreSQL
        • Replicated
    • SQL Reference
      • Statements
        • SELECT
          • Overview
          • ALL
          • ARRAY JOIN
          • DISTINCT
          • FORMAT
          • FROM
          • GROUP BY
          • HAVING
          • INTO OUTFILE
          • JOIN
          • LIMIT
          • LIMIT BY
          • OFFSET
          • ORDER BY
          • PREWHERE
          • SAMPLE
          • UNION
          • WHERE
          • WITH
          • INSERT INTO
        • CREATE
          • Overview
          • DATABASE
          • TABLE
          • VIEW
          • DICTIONARY
          • FUNCTION
          • USER
          • ROLE
          • ROW POLICY
          • QUOTA
          • SETTINGS PROFILE
        • ALTER
          • ALTER
          • COLUMN
          • PARTITION
          • SETTING
          • DELETE
          • UPDATE
          • ORDER BY
          • SAMPLE BY
          • INDEX
          • CONSTRAINT
          • TTL
          • USER
          • QUOTA
          • ROLE
          • ROW POLICY
          • SETTINGS PROFILE
          • PROJECTION
          • VIEW
          • SYSTEM
          • SHOW
          • GRANT
          • EXPLAIN
          • REVOKE
          • ATTACH
          • CHECK
          • DESCRIBE
          • DETACH
          • DROP
          • EXISTS
          • KILL
          • OPTIMIZE
          • RENAME
          • EXCHANGE
          • SET
          • SET ROLE
          • TRUNCATE
          • USE
          • WATCH
          • Syntax
          • Distributed DDL
      • Functions
        • Introduction
        • Arithmetic
        • Arrays
        • Comparison
        • Logical
        • Type Conversion
        • Dates and Times
        • Strings
        • For Searching in Strings
        • For Replacing in Strings
        • Conditional
        • Files
        • Mathematical
        • Rounding
        • Working with maps
        • Splitting and Merging Strings and Arrays
        • Bit
        • Bitmap
        • Hash
        • Pseudo-Random Numbers
        • Encoding
        • UUID
        • URLs
        • IP Addresses
        • JSON
        • External Dictionaries
        • Yandex.Metrica Dictionaries
        • IN Operator
        • arrayJoin
        • Geo
          • Geographical Coordinates
          • Geohash
          • H3 Indexes
          • Nullable
          • Machine Learning
          • Introspection
          • Tuples
          • Encryption
          • NLP
          • Other
      • 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
        • deltaSumTimestamp
        • sumMap
        • minMap
        • maxMap
        • sumCount
        • rankCorr
        • sumKahan
        • intervalLengthSum
        • skewPop
        • skewSamp
        • kurtPop
        • kurtSamp
        • uniq
        • uniqExact
        • uniqCombined
        • uniqCombined64
        • uniqHLL12
        • uniqTheta
        • quantile
        • quantiles Functions
        • quantileExact Functions
        • quantileExactWeighted
        • quantileTiming
        • quantileTimingWeighted
        • quantileDeterministic
        • quantileTDigest
        • quantileTDigestWeighted
        • quantileBFloat16
        • median
        • simpleLinearRegression
        • stochasticLinearRegression
        • stochasticLogisticRegression
        • categoricalInformationValue
        • studentTTest
        • welchTTest
        • mannWhitneyUTest
        • Combinators
        • Parametric
      • Table Functions
        • Introduction
        • file
        • merge
        • numbers
        • remote
        • url
        • mysql
        • postgresql
        • jdbc
        • odbc
        • hdfs
        • s3
        • input
        • generateRandom
        • cluster
        • view
        • null function
        • dictionary function
        • s3Cluster
        • sqlite
      • 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
        • Date32
        • 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
      • Troubleshooting
      • ClickHouse Upgrade
      • Access Control and Account Management
      • External User Authenticators and Directories
        • Introduction
        • Kerberos
        • LDAP
        • Data Backup
        • Configuration Files
        • Quotas
      • 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_skipping_indices
        • 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.query_views_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
        • system.zookeeper_log
      • 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-format
        • ClickHouse compressor
        • ClickHouse obfuscator
        • clickhouse-odbc-bridge
        • Usage Recommendations
        • OpenTelemetry Support
        • Caches
        • ClickHouse Keeper
        • External Disks for Storing Data
    • 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
      • Use Cases
      • Operations
      • Integration
    • What’s New
      • Changelog
        • 2021
        • 2020
        • 2019
        • 2018
        • 2017
      • Roadmap
      • Security Changelog
      • What’s New in ClickHouse?
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