所以我在Web SQL中有2个表,其中一个看起来像这样(有数千行):
customer_number | order_number
--------------------------------------------
1234 12
1234 13
1234 14
6793 20
6793 22
3210 53
etc.
另一张表就像这样(也有数千行):
customer_number | first_purchase_year
----------------------------------------------------
1234 2010
5313 2001
1632 2018
9853 2017
6793 2000
3210 2005
etc.
我有这个代码从第一个表中选择10个客户并列出他们的所有购买:
select top 10 * from
(select distinct t1.customer_number,
stuff((select '' + t2.order_number
from orders t2
where t1.customer_number = t2.customer_number
for xml path(''), type
).value('.','NVARCHAR(MAX)')
,1,0,'')DATA
from orders t1) a
Whch输出:
customer_number | order_number
--------------------------------------------
1234 12 13 14
6793 20 22
3210 53
我需要做的只是显示10个拥有first_purchase_year>的随机客户2010。 我不确定如何检查对应于customer_number的first_purchase_year是否大于2010。 谢谢!
答案 0 :(得分:0)
您只需要在外部from
子句中修复子查询:
select c.customer_number,
stuff((select '' + o2.order_number
from orders o2
where c.customer_number = o2.customer_number
for xml path(''), type
).value('.','NVARCHAR(MAX)'
), 1, 0, ''
) as data
from (select top (10) c.customer_number
from table2 c
where c.first_purchase_year > 2010
) c;