在Impala中每周检查一次数据

Question

我正在与学生（学生= 1）建立一个民族数据集，我需要每周对这些学生进行监控。 如何过滤特定日期的数据，然后在7天和14天之后对其进行监视？ 这样的事情。 仅此部分有效：(CASE WHEN (student = 1) and (start_date = '2015-04-01 00:00:00') THEN 1 ELSE 0 END) AS date_to_monitor, I think the date_add`令mme悲伤，因为它抱怨布尔类型

Select *,
(CASE WHEN (student = 1) and (start_date = '2015-04-01 00:00:00') THEN 1 ELSE 0 END) AS date_to_monitor,
(CASE WHEN (student= 1) and (date_add(start_date = '2018-11-01 00:00:00' , 7)) THEN 1 ELSE 0 END) AS date_to_monitor,
(CASE WHEN (student= 1) and (date_add(start_date = '2018-11-01 00:00:00' , 14)) THEN 1 ELSE 0 END) AS date_to_monitor,
from old;