Question

运行以下查询时：

SELECT EXTRACT(HOUR FROM TIMESTAMP '2018-07-09T02:40:23.652Z' AT TIME ZONE 'US/Eastern')

它返回预期的结果：22

但是在运行时：

SELECT start_ts, EXTRACT(HOUR FROM TIMESTAMP TIMESTAMP_MICROS(CAST(1000000 * start_ts AS INT64)) AT TIME ZONE 'US/Eastern') as calc 
    from SOME_CALCS

引发错误：

语法错误：应为“）”或关键字AT，但有标识符 “ TIMESTAMP_MICROS”在[1:46]

我所要做的只是将字符串替换为TIMESTAMP_MICROS。

Answer 1

对于BigQuery Standard SQL，您应该使用（假设start_ts的格式为：1563026408.17193）

SELECT start_ts, 
  EXTRACT(HOUR FROM DATETIME(TIMESTAMP_MICROS(CAST(1000000 * start_ts AS INT64)), 'US/Eastern')) as calc
FROM SOME_CALCS

Answer 2

您只需要在代码中不需要关键字Not Found

timestamp

select extract( hour from timestamp_micros( cast(1563456789.012345 * 1000000 as int64) ) at time zone 'US/Eastern')已经为您返回了时间戳记对象： timestamp_micros

时间戳失败的Bigquery提取

2 个答案: