Int | UInt 类型
ClickHouse 提供了多种固定长度的整数类型,
包括带符号(Int)和无符号(UInt),范围从 1 字节到 32 字节。
在创建表时,可以为整数类型指定数值长度参数(例如 TINYINT(8)、SMALLINT(16)、INT(32)、BIGINT(64)),但 ClickHouse 会忽略这些参数。
整数范围
整数类型的取值范围如下:
| 类型 | 取值范围 |
|---|---|
Int8 | [-128 : 127] |
Int16 | [-32768 : 32767] |
Int32 | [-2147483648 : 2147483647] |
Int64 | [-9223372036854775808 : 9223372036854775807] |
Int128 | [-170141183460469231731687303715884105728 : 170141183460469231731687303715884105727] |
Int256 | [-57896044618658097711785492504343953926634992332820282019728792003956564819968 : 57896044618658097711785492504343953926634992332820282019728792003956564819967] |
无符号整数类型的取值范围如下:
| 类型 | 取值范围 |
|---|---|
UInt8 | [0 : 255] |
UInt16 | [0 : 65535] |
UInt32 | [0 : 4294967295] |
UInt64 | [0 : 18446744073709551615] |
UInt128 | [0 : 340282366920938463463374607431768211455] |
UInt256 | [0 : 115792089237316195423570985008687907853269984665640564039457584007913129639935] |
整数类型别名
整数类型有以下别名:
| 类型 | 别名 |
|---|---|
Int8 | TINYINT, INT1, BYTE, TINYINT SIGNED, INT1 SIGNED |
Int16 | SMALLINT, SMALLINT SIGNED |
Int32 | INT, INTEGER, MEDIUMINT, MEDIUMINT SIGNED, INT SIGNED, INTEGER SIGNED |
Int64 | BIGINT, SIGNED, BIGINT SIGNED, TIME |
无符号整数类型有以下别名:
| 类型 | 别名 |
|---|---|
UInt8 | TINYINT UNSIGNED, INT1 UNSIGNED |
UInt16 | SMALLINT UNSIGNED |
UInt32 | MEDIUMINT UNSIGNED, INT UNSIGNED, INTEGER UNSIGNED |
UInt64 | UNSIGNED, BIGINT UNSIGNED, BIT, SET |