select
T21620.日期 as F21634,
select QUARTER(‘98-04-01‘) as quarter #返回日期是一年的第几个季度 -> 2 ,‘98-04-01‘ or ‘1998-04-01‘ or ‘19980401‘ 都可以,但是只有年月没有日会报错,如‘199804‘
from 竟企数据分析 T21620