我有3个表：保险单，索赔和应收款
我需要一个查询，每个策略每个策略周期返回一行。查询需要包括政策开始和结束日期，每个期间的总索赔，每个期间的总支付和O / S，以及每个期间收到的总金额。
我设法做了除可回收之外的所有事情。当这被引入查询时，所有内容都乘以该表中的行数。
这是我的数据
策略
PolNo Version TransType InceptionDate RenewalDate
0021 0 New 01/01/2008 01/01/2009
0021 1 MTA 01/01/2008 01/01/2009
0021 2 MTA 01/01/2008 01/01/2009
0021 3 Renewal 01/01/2009 01/01/2010
权利要求
PolNo ClaimNo ClaimDate Paid Outstanding
0021 0001 01/05/2008 300.00 -100.00
0021 0002 01/06/2008 500.00 200.00
0021 0003 01/07/2008 200.00 300.00
0021 0004 01/08/2008 800.00 0.00
0021 0005 01/02/2009 0.00 0.00
0021 0006 01/10/2009 0.00 1000.00
收款
PolNo Version RecvdDate Amount
0021 0 02/01/2008 150.00
0021 0 01/02/2008 150.00
0021 0 01/03/2008 150.00
0021 0 01/04/2008 150.00
0021 0 01/05/2008 150.00
0021 0 01/06/2008 150.00
0021 0 01/07/2008 150.00
0021 0 01/08/2008 150.00
0021 2 01/09/2008 150.00
0021 2 01/10/2008 150.00
0021 3 02/01/2009 500.00
0021 3 01/02/2009 500.00
这是我的工作查询
select distinct(a.InceptionDate) as InceptionDate, a.RenewalDate as RenewalDate,
count(b.ClaimNo) as ClaimCount, sum(b.Paid) as TotPaid, sum(b.Outstanding) as TotalO/S
from Policies a, Claims b
where a.PolNo='0021'
and a.PolNo=b.PolNo
and b.ClaimDate between a.InceptionDate and a.RenewalDate
and a.TransType in ('New','Renewal')
group by a.InceptionDate, a.RenewalDate
结果：
InceptionDate RenewalDate ClaimCount TotPaid TotalO/S
01/01/2008 01/01/2009 4 1800.00 400.00
01/01/2009 01/01/2010 2 0 1000.00
我必须将TransType添加到查询中，因为我获得了声明数据的乘数，但此查询有效。
现在，当我添加第三个表格时，我得到一个乘数。索赔中的所有内容都会与期间的应收款管理系统中的数字相乘，而AmountRecvd则乘以该期间的索赔中的行数。
以下是查询：
select distinct(a.InceptionDate) as InceptionDate, a.RenewalDate as RenewalDate,
count(b.ClaimNo) as ClaimCount, sum(b.Paid) as TotPaid, sum(b.Outstanding) asTotalO/S,
sum(c.Amount) as RecvdAmount
from Policies a, Claims b, Receivables c
where a.PolNo='0021'
and a.PolNo=b.PolNo
and a.PolNo=c.PolNo
and b.ClaimDate between a.InceptionDate and a.RenewalDate
and c.RecvdDate between a.InceptionDate and a.RenewalDate
and a.TransType in ('New','Renewal')
group by a.InceptionDate, a.RenewalDate
结果
InceptionDate RenewalDate ClaimCount TotPaid TotalO/S AmountRecvd
01/01/2008 01/01/2009 40 18000 4000 6000.00
01/01/2009 01/01/2010 20 0 10000 2000.00
我无法看到可以将应收款管理系统加入索赔。我尝试在PolNo上加入他们，但结果相同。
有人能看到解决方案吗？
干杯
已更新此查询并未多次使用ClaimsCount，但AmountRevd仍然与声明相乘（为简单起见已移除TotPaid）：
SELECT
p.InceptionDate,
p.RenewalDate,
sum(c1.ClaimCount) AS ClaimsCount,
sum(r1.TotRecvd) AS AmountRecvd
FROM Policies p
LEFT JOIN (SELECT
p1.InceptionDate,
p1.RenewalDate,
c.Polno,
c.ClaimDate,
COUNT(c.SubCount) AS ClaimCount
FROM Policies p1
INNER JOIN (SELECT
PolNo,
ClaimDate,
Count(*) as SubCount
FROM Claims
GROUP BY PolNo, ClaimDate) c
ON p1.PolNo=c.PolNo
WHERE c.ClaimDate BETWEEN p1.InceptionDate AND p1.RenewalDate
AND p1.TransType IN ('New','Renewal')
GROUP BY p1.InceptionDate, p1.RenewalDate, c.Polno, c.ClaimDate) c1
ON p.PolNo=c1.PolNo
LEFT JOIN (SELECT
p2.InceptionDate,
p2.RenewalDate,
r.Polno,
SUM(r.SubTot) AS TotalRecvd
FROM Policies p2
INNER JOIN (SELECT
PolNo,
RecvdDate,
SUM(Amount) as SubTot
FROM Receivables
GROUP BY Polno,RecvdDate) r
ON p2.PolNo=r.PolNo
WHERE r.RecvdDate BETWEEN p2.InceptionDate AND p2.RenewalDate
AND p2.TransType IN ('New','Renewal')
GROUPBY p2.InceptionDate, p2.RenewalDate, r.Polno) r1
ON p.PolNo=r1.PolNo
WHERE p.PolNo = '0021'
AND p.TransType IN ('New','Renewal')
AND p.PolNo = c1.PolNo
AND p.PolNo = r1.PolNo
AND p.InceptionDate = c1.InceptionDate
AND p.RenewalDate = c1.RenewalDate
AND p.InceptionDate = r1.InceptionDate
AND p.RenewalDate = r1.RenewalDate
GROUP BY p.InceptionDate, p.RenewalDate
答案 0 :(得分：1)
-- Query for the periods:
WITH Periods AS (
SELECT DISTINCT
PolNo, InceptionDate, RenewalDate
FROM Policies
WHERE TransType in ('New','Renewal')
),
-- Query for the claims
PeriodClaims AS (
SELECT
p.PolNo, p.InceptionDate, p.RenewalDate,
COUNT(*) AS CountClaims,
SUM(c.Paid) AS PaidClaims,
SUM(c.Outstanding) AS OutstandingClaims
FROM Periods p
INNER JOIN Claims c ON c.PolNo = p.PolNo
WHERE c.ClaimDate BETWEEN p.InceptionDate AND p.RenewalDate
GROUP BY p.PolNo, p.InceptionDate, p.RenewalDate
),
-- Query for the receivables
PeriodRecieved AS (
SELECT
p.PolNo, p.InceptionDate, p.RenewalDate,
COUNT(*) AS CountReceived,
SUM(r.Amount) AS AmountReceived
FROM Periods p
INNER JOIN Receivables r ON r.PolNo = p.PolNo
WHERE r.RecvdDate BETWEEN p.InceptionDate AND p.RenewalDate
GROUP BY p.PolNo, p.InceptionDate, p.RenewalDate
)
-- All together now
SELECT
p.PolNo, p.InceptionDate, p.RenewalDate,
c.CountClaims, c.PaidClaims, c.OutstandingClaims,
r.CountReceived, r.AmountReceived
FROM Periods p
LEFT JOIN PeriodClaims c
ON c.PolNo = p.PolNo
AND c.InceptionDate = p.InceptionDate
AND c.RenewalDate = p.RenewalDate
LEFT JOIN PeriodRecieved r
ON r.PolNo = p.PolNo
AND r.InceptionDate = p.InceptionDate
AND r.RenewalDate = p.RenewalDate
或者，没有CTE：
SELECT
p.PolNo, p.InceptionDate, p.RenewalDate,
c.CountClaims, c.PaidClaims, c.OutstandingClaims,
r.CountReceived, r.AmountReceived
FROM (
-- Query for the periods:
SELECT DISTINCT
PolNo, InceptionDate, RenewalDate
FROM Policies
WHERE TransType in ('New','Renewal')
) p
LEFT JOIN (
-- Query for the claims
SELECT
p.PolNo, p.InceptionDate, p.RenewalDate,
COUNT(*) AS CountClaims,
SUM(c.Paid) AS PaidClaims,
SUM(c.Outstanding) AS OutstandingClaims
FROM (
-- Query for the periods:
SELECT DISTINCT
PolNo, InceptionDate, RenewalDate
FROM Policies
WHERE TransType in ('New','Renewal')
) p
INNER JOIN Claims c ON c.PolNo = p.PolNo
WHERE c.ClaimDate BETWEEN p.InceptionDate AND p.RenewalDate
GROUP BY p.PolNo, p.InceptionDate, p.RenewalDate
) c
ON c.PolNo = p.PolNo
AND c.InceptionDate = p.InceptionDate
AND c.RenewalDate = p.RenewalDate
LEFT JOIN (
-- Query for the receivables
SELECT
p.PolNo, p.InceptionDate, p.RenewalDate,
COUNT(*) AS CountReceived,
SUM(r.Amount) AS AmountReceived
FROM (
-- Query for the periods:
SELECT DISTINCT
PolNo, InceptionDate, RenewalDate
FROM Policies
WHERE TransType in ('New','Renewal')
) p
INNER JOIN Receivables r ON r.PolNo = p.PolNo
WHERE r.RecvdDate BETWEEN p.InceptionDate AND p.RenewalDate
GROUP BY p.PolNo, p.InceptionDate, p.RenewalDate
) r
ON r.PolNo = p.PolNo
AND r.InceptionDate = p.InceptionDate
AND r.RenewalDate = p.RenewalDate
输出（转置）：
PolNo 21 21
InceptionDate 2008-01-01 2009-01-01
RenewalDate 2009-01-01 2010-01-01
CountClaims 4 2
PaidClaims 1800.00 0.00
OutstandingClaims 400.00 1000.00
CountReceived 10 2
AmountReceived 1500.00 1000.00