谁能解释then 1 else 0 end计算的内容吗？
我不知道declare @months table (value varchar(25))
insert into @months values (1)
insert into @months values (2)
insert into @months values (3)
insert into @months values (4)
insert into @months values (5)
insert into @months values (6)
insert into @months values (7)
insert into @months values (8)
insert into @months values (9)
insert into @months values (10)
insert into @months values (11)
insert into @months values (12)
select mem_no
, eff_dt
, term_date
, datediff(month, EFF_DT, TERM_DATE)
- case when datepart(day, EFF_DT) > datepart(day, TERM_DATE) then 1 else 0 end as active2012,
m.value as [active_month]
from #temp_eligibles, ,@months m
where
m.value between datepart(m,EFF_DT) and datepart(m,term_date) and
EFF_YR = '2012'
在做什么。
UPDATE RH SET
--SELECT RH.economic_class ,
economic_class = C.economic_class
FROM dbo.tblRecHist RH
JOIN tblComp C ON RH.company_id = C.company_id
WHERE RH.company_id = @CompID
AND RH.rec_date = @RecDate