我有两个功能:
fn_get_AB_associations(Date from, Date to, Int AentityId)
使用以下字段获取结果:
datefrom | AentityId | BentityId
和
fn_get_BC_associations(Date from, Date to, Int BentityId)
使用以下字段获取结果:
datefrom | BentityId | CentityId
我需要在日期范围内选择与A实体关联的所有C实体。
我试图做类似的事情:
select DISTINCT T1.BentityId from dbo.fn_get_AB_associations('2013-04-01', '2013-04-15', 'PF') T1
INNER JOIN fn_get_BC_associations('2013-04-01', '2013-04-15', T1.BentityId) T2
ON T1.BentityId = T2.BentityId
但我明显得到这个错误:The multi-part identifier "T1.BentityId" could not be bound.
所以...有没有办法加入这两个结果集,或者我必须为第一个函数的结果提供cicle并为每个结果调用第二个函数?
答案 0 :(得分:2)
试试这个 -
DECLARE
@DateStart DATETIME
, @DateEnd DATETIME
SELECT
@DateStart = '2013-04-01'
, @DateEnd = '2013-04-15'
SELECT DISTINCT
t1.DateFrom
, t1.AentityId
, t1.BentityId
, t2.*
FROM dbo.fn_get_AB_associations(@DateStart, @DateEnd, 'PF') t1
OUTER APPLY (
SELECT
t2.DateFrom
, t2.CentityId
FROM dbo.fn_get_BC_associations(@DateStart, @DateEnd, t1.BentityId) t2
WHERE t1.BentityId = t2.BentityId
) t2