求助大神，datetimeV2如何转化成毫秒时间戳
1 Answers
看文档没有直接转为毫秒的函数，只能先 UNIX_TIMESTAMP，然后加上 extract(microsecond from cast('2022-09-22 17:01:30.000123' as datetimev2(6)))；
或者加上 microsecond(cast('1999-01-02 10:11:12.000123' as datetimev2(6)))
相关函数见文档：EXTRACT，MICROSECOND，UNIX_TIMESTAMP
