# 数据类型示例
<a name="data-types-examples"></a>

下表列示了 DML 数据类型的示例文字。


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| 数据类型 | 示例 | 
| --- | --- | 
| BOOLEAN | `true`<br />`false ` | 
| TINYINT | `TINYINT '123'` | 
| SMALLINT | `SMALLINT '123'` | 
| INT，INTEGER | `123456790` | 
| BIGINT | `BIGINT '1234567890'`<br />`2147483648` | 
| REAL | `'123456.78'` | 
| DOUBLE | `1.234` | 
| DECIMAL({{precision}}, {{scale}}) | `DECIMAL '123.456'` | 
| CHAR、CHAR({{length}}) | `CHAR 'hello world'`, `CHAR 'hello ''world''!'` | 
| VARCHAR、VARCHAR({{length}}) | `VARCHAR 'hello world'`, `VARCHAR 'hello ''world''!'` | 
| VARBINARY | `X'00 01 02'` | 
| TIME、TIME({{precision}}) | `TIME '10:11:12'`, `TIME '10:11:12.345'` | 
| 带时区的时间 | `TIME '10:11:12.345 -06:00'` | 
| DATE | `DATE '2024-03-25'` | 
| TIMESTAMP、TIMESTAMP WITHOUT TIME ZONE、TIMESTAMP({{precision}})、TIMESTAMP({{precision}}) WITHOUT TIME ZONE  | `TIMESTAMP '2024-03-25 11:12:13'`, `TIMESTAMP '2024-03-25 11:12:13.456'` | 
| TIMESTAMP WITH TIME ZONE、TIMESTAMP({{precision}}) WITH TIME ZONE | `TIMESTAMP '2024-03-25 11:12:13.456 Europe/Berlin'` | 
| INTERVAL YEAR TO MONTH | `INTERVAL '3' MONTH` | 
| INTERVAL DAY TO SECOND | `INTERVAL '2' DAY` | 
| ARRAY[{{element\_type}}] | `ARRAY['one', 'two', 'three']` | 
| MAP({{key\_type}}, {{value\_type}}) | `MAP(ARRAY['one', 'two', 'three'], ARRAY[1, 2, 3])`<br />请注意，映射根据键的数组和值的数组创建。以下示例将创建将字符串映射到整数的表。<pre>CREATE TABLE map_table(col1 map<string, integer>) LOCATION '...';<br />INSERT INTO map_table values(MAP(ARRAY['foo', 'bar'], ARRAY[1, 2]));</pre> | 
| ROW({{field\_name\_1}} {{field\_type\_1}}, {{field\_name\_2}} {{field\_type\_2}}, …) | `ROW('one', 'two', 'three')`<br />请注意，以这种方式创建的行并无列名。要添加列名，可以使用 `CAST`，如下例所示：<pre>CAST(ROW(1, 2, 3) AS ROW(one INT, two INT, three INT))</pre> | 
| JSON | `JSON '{"one":1, "two": 2, "three": 3}'` | 
| UUID | `UUID '12345678-90ab-cdef-1234-567890abcdef'` | 
| IPADDRESS | `IPADDRESS '10.0.0.1'`<br />`IPADDRESS '2001:db8::1'` |