STRING to DATE in BIGQUERY

Question

I am struggling trying to do this with Google BigQuery:

I do have a column with dates in this following STRING format:

6/9/2017   (M/D/YYYY)

I am wondering how can I deal with this, trying to use then the DATE clause., in order to get the DATE format:

YYYY-MM-DD.

Thanks in advance.

Answer 1

简单，标准SQL：

#standardSQL
SELECT PARSE_DATE('%m/%d/%Y',  '6/22/2017')


2017-06-22  

https://cloud.google.com/bigquery/docs/reference/standard-sql/functions-and-operators#supported-format-elements-for-date

Answer 2

此解决方案可以工作

SELECT    CAST(
            CONCAT(
              SUBSTR(DT_DOCUMENTO, 0 , 4), 
              '-' ,
              SUBSTR(DT_DOCUMENTO, 5 , 2), 
              '-' , 
              SUBSTR(DT_DOCUMENTO, 7 , 2) 
            ) AS DATE
          ) AS FORMAT_DATE