类别:

半结构化和结构化数据函数 (类型转换)

AS_TIMESTAMP_*

将 VARIANT 值转换为相应的 TIMESTAMP 值:

  • AS_TIMESTAMP_LTZ (具有本地时区的值)

  • AS_TIMESTAMP_NTZ (不带时区的值)

  • AS_TIMESTAMP_TZ (带时区的值)

另请参阅:

AS_<object_type>AS_DATEAS_TIME

语法

AS_TIMESTAMP_LTZ( <variant_expr> )

AS_TIMESTAMP_NTZ( <variant_expr> )

AS_TIMESTAMP_TZ( <variant_expr> )
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实参

variant_expr

VARIANT 类型值计算的表达式。

示例

这显示了该函数的使用方法:

创建表和数据:

CREATE TABLE multiple_types (
    binary1 VARIANT,
    date1 VARIANT,
    decimal1 VARIANT,
    time1 VARIANT,
    timestamp1 VARIANT
    );
INSERT INTO multiple_types 
     (binary1, date1, decimal1, time1, timestamp1)
   SELECT 
     TO_VARIANT(TO_BINARY('F0A5')),
     TO_VARIANT(TO_DATE('2018-10-10')), 
     TO_VARIANT(TO_DECIMAL(1.23, 6, 3)),
     TO_VARIANT(TO_TIME('12:34:56')),
     TO_VARIANT(TO_TIMESTAMP_NTZ('2018-10-10 12:34:56'))
     ;
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现在运行查询:

SELECT AS_TIMESTAMP_NTZ(timestamp1) AS "Timestamp" FROM multiple_types;
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输出:

+-------------------------+
| Timestamp               |
|-------------------------|
| 2018-10-10 12:34:56.000 |
+-------------------------+
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语言: 中文