The EXTRACT function is used to retrieve a specific component of a date or a timestamp. This function is available in several databases such as MySQL, Oracle, DB2, PostgreSQL, and Google BigQuery. Note that this function is not available in SQL Server and Hive. ...
Extract can only get single fields. To extract the full date (year, month, day) or time (hour, minute, second) from a timestamp, cast can be used:1 CAST(<timestamp> AS [DATE|TIME]) This is particularly useful for the group by clause. In the where clause, it is often the wrong...
.'|| extract(year from :date))对于月份和年份 浏览0提问于2017-05-25得票数 0 2回答 如何使用BigQuery按月分组 、 我正在尝试使用TIMESTAMP列/字段来统计每月(数年)的公交出行次数(包括起点和目的地)。我可以按月(TIMESTAMP_TRUNC(start_date, MONTH))来做这件事,但我想按月做。任何帮助都是非常感谢的。