Sql 添加上一个字段的数量
请注意,我有两个表: 我希望trnamt from表格salary更新为rec记录中的tbl_emi,但金额不应超过每个记录的emi金额,例如,在这种情况下,salary表格中的金额1000应添加到第一个记录中500,再添加到tbl_emi表格的第二个记录中500Sql 添加上一个字段的数量,sql,sql-server,Sql,Sql Server,请注意,我有两个表: 我希望trnamt from表格salary更新为rec记录中的tbl_emi,但金额不应超过每个记录的emi金额,例如,在这种情况下,salary表格中的金额1000应添加到第一个记录中500,再添加到tbl_emi表格的第二个记录中500 tbl_emi EMI DUEDT REC Acno 500 4/30/2014 500 123 500 5/30/2014 0
tbl_emi
EMI DUEDT REC Acno
500 4/30/2014 500 123
500 5/30/2014 0 123
500 6/30/2014 0 123
slary
Acno Trnamt
123 1000
我使用了下面的查询,但它仍在tbl_emi tbale+工资表中的trnamt中添加rec字段,但不应超过emi金额
选择查询1:为累计emi创建临时表
select a.emi, a.duedt, a.rec, a.acno, coalesce(sum(b.emi),0) as emi_accumulated
into #accumulated_amount5
from tbl_emi a
left join tbl_emi b on a.acno = b.acno and b.duedt < a.duedt
group by a.emi, a.duedt, a.rec, a.acno;
更新查询1:更新rec金额
update #accumulated_amount_with_salary5
set rec = rec + case
when salary_amt < emi_accumulated then 0
when (salary_amt - emi_accumulated) < emi then salary_amt - emi_accumulated
else emi
end
您可以在薪资表上使用插入后触发器,该触发器将在每次插入薪资表后更新tbl_emi表,
有关如何在sql server中创建触发器的参考,请参阅假设您有累积和函数,通过计算累积emi值并与trnamt进行比较,这相对容易: 即使没有累积和,您仍然可以使用相关子查询执行相同的操作 编辑: 在SQL Server 2008中,可以将累积总和表示为:
with toupdate as (
select e.*,
(select sum(e2.emi)
from tbl_emi e2
where e2.acno = e.acno and
e2.duedt <= e.duedt
) as cumemi
from tbl_emi e
)
update toupdate
set rec = (case when trnamt > cumemi then emi
else trnamt - cumemi + emi
end)
from toupdate join
slary
on toupdate.acno = slary.acno and
toupdate.cumemi - emi < trnamt;
这在sql server 2008上有效吗?因为它向我显示了错误:“order”附近的语法不正确。您是如何创建topdate对象的?@user2786306。那是个打字错误。它应该是最新的。
update t
set lastrecdate=(CAST(GETDATE() AS DATE)), rec = a.rec
from tbl_emi t
inner join #accumulated_amount_with_salary5 a on t.acno = a.acno and t.duedt = a.duedt
--Finance
with toupdate as (
select e.*, sum(emi) over (partition by acno order by duedt) as cumemi
from tbl_emi e
)
update toupdate
set rec = (case when trnamt > cumemi then emi
else trnamt - cumemi + emi
end)
from toupdate join
slary
on toupdate.acno = slary.acno and
toupdate.cumemi - emi < trnamt;
with toupdate as (
select e.*,
(select sum(e2.emi)
from tbl_emi e2
where e2.acno = e.acno and
e2.duedt <= e.duedt
) as cumemi
from tbl_emi e
)
update toupdate
set rec = (case when trnamt > cumemi then emi
else trnamt - cumemi + emi
end)
from toupdate join
slary
on toupdate.acno = slary.acno and
toupdate.cumemi - emi < trnamt;