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ClickHouse Documentation

Introduction
Introduction
Getting Started
Getting Started
- Deploying and Running
- Example Datasets
  Example Datasets
Interfaces
Interfaces
- Introduction
- Command-Line Client
- Native Interface (TCP)
- HTTP Interface
- Input and Output Formats
- JDBC Driver
- ODBC Driver
- Third-Party
  Third-Party
Data Types
Data Types
- Introduction
- UInt8, UInt16, UInt32, UInt64, Int8, Int16, Int32, Int64
- Float32, Float64
- Decimal
- Boolean
- String
- FixedString(N)
- UUID
- Date
- DateTime
- Enum
- Array(T)
- AggregateFunction(name, types_of_arguments...)
- Tuple(T1, T2, ...)
- Nullable
- Nested Data Structures
  Nested Data Structures
  - Nested(Name1 Type1, Name2 Type2, ...)
- Special Data Types
  Special Data Types
  - Expression
  - Set
  - Nothing
Table Engines
Table Engines
- Introduction
- MergeTree Family
  MergeTree Family
- Log Family
  Log Family
  - Introduction
  - StripeLog
  - Log
  - TinyLog
- Integrations
  Integrations
  - Kafka
  - MySQL
- Special
  Special
  - Distributed
  - External data
  - Dictionary
  - Merge
  - File
  - Null
  - Set
  - Join
  - URL
  - View
  - MaterializedView
  - Memory
  - Buffer
SQL Reference
SQL Reference
- SELECT
- INSERT INTO
- CREATE
- ALTER
- Other Kinds of Queries
- Functions
  Functions
- Aggregate Functions
  Aggregate Functions
- Table Functions
  Table Functions
  - Introduction
  - file
  - merge
  - numbers
  - remote
  - url
  - jdbc
- Dictionaries
  Dictionaries
  - Introduction
  - External Dictionaries
    External Dictionaries
    
    General Description
    
    Configuring an External Dictionary
    
    Storing Dictionaries in Memory
    
    Dictionary Updates
    
    Sources of External Dictionaries
    
    Dictionary Key and Fields
  - Internal Dictionaries
- Operators
- General Syntax
Operations
Operations
- Introduction
- Requirements
- Monitoring
- Troubleshooting
- Usage Recommendations
- ClickHouse Update
- Access Rights
- Data Backup
- Configuration Files
- Quotas
- System Tables
- Server Configuration Parameters
  Server Configuration Parameters
  - Introduction
  - Server Settings
- Settings
  Settings
- Utilities
  Utilities
F.A.Q.
F.A.Q.
- General Questions
Development
Development
What's New
What's New

Single page version
PDF version
ClickHouse source code

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Boolean Values¶

There isn't a separate type for boolean values. They use the UInt8 type, restricted to the values 0 or 1.

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