Question

尝试从纪元代码转换为时间戳，在旧版SQL中工作正常，而在标准SQL中，我遇到错误。字段名称custom_field_6（字符串类型字段）代表纪元时间，我想将其转换为时间戳记（在标准SQL中）

在旧版SQL中，我执行了以下操作：select custom_field_6 as custom_field_6, timestamp(custom_field_6) as custom_field_6_convert FROM [yellowhead-visionbi-rivery:yellowhead_prod.affise_conversions]

The query output

在标准sql中：

select custom_field_6 as custom_field_6, cast(custom_field_6 as date) as custom_field_6_converted FROM yellowhead-visionbi-rivery.yellowhead_prod.affise_conversions``

The error I get：“无效日期”

Answer 1

BigQuery标准SQL的ID下方

#standardSQL
SELECT 
  custom_field_6, 
  TIMESTAMP_SECONDS(CAST(custom_field_6 AS INT64)) custom_field_6_convert
FROM `yellowhead-visionbi-rivery.yellowhead_prod.affise_conversions`

您可以使用以下虚拟数据进行测试

#standardSQL
WITH `project.dataset.table` AS (
  SELECT '1540051185' custom_field_6 UNION ALL
  SELECT '1540252572' 
)
SELECT 
  custom_field_6, 
  TIMESTAMP_SECONDS(CAST(custom_field_6 AS INT64)) custom_field_6_convert
FROM `project.dataset.table`

有结果

Row custom_field_6  custom_field_6_convert   
1   1540051185      2018-10-20 15:59:45 UTC  
2   1540252572      2018-10-22 23:56:12 UTC

尝试将纪元代码字段（字符串类型）转换为时间戳

1 个答案: