我是SQL Server的新手，想从两个表-Bill（主表）和BillDetail（详细表）生成查询。这两个表数据如下：
帐单数据：
+------------------+--------------+---------------+------------+----------+-------------------------+
| ContractorBillId | ContractorId | BillNo | BillDate |IsDeleted | UpdatedDate |
+------------------+--------------+---------------+------------+----------+-------------------------+
| 1050 | 2 | 2-20190329-W | 2019-03-29 | 0 | 2019-03-29 13:53:51.447 |
| 1051 | 2 | 2-20190329-W1 | 2019-03-29 | 0 | 2019-03-29 18:48:48.077 |
| 1052 | 2 | 2-20190402-W | 2019-04-02 | 0 | 2019-04-02 15:54:16.267 |
| 1053 | 1 | 1-20190402-E | 2019-04-02 | 0 | 2019-04-02 18:58:50.753 |
| 1078 | 1 | 1-20190403-A | 2019-04-03 | 0 | 2019-04-03 10:59:18.083 |
| 1079 | 1 | 1-20190403-A1 | 2019-04-03 | 0 | 2019-04-03 11:00:37.197 |
| 1080 | 1 | 1-20190403-E | 2019-04-03 | 0 | 2019-04-03 11:33:41.333 |
+------------------+--------------+---------------+------------+----------+-------------------------+
BillDetail表数据：
+----------------------+------------------+---------------------+------------+--------+-------------+
| ContractorBillItemId | ContractorBillId | ContractorPayTypeId | WeekEnding | Hours | GrossAmount |
+----------------------+------------------+---------------------+------------+--------+-------------+
| 1064 | 1050 | 2 | 2019-03-29 | 145.00 | 725000.0000 |
| 1065 | 1051 | 1 | 2019-03-29 | 50.00 | 75000.0000 |
| 1066 | 1052 | 1 | 2019-04-05 | 10.00 | 15000.0000 |
| 1067 | 1052 | 2 | 2019-04-05 | 12.00 | 60000.0000 |
| 1068 | 1053 | 4 | 2019-04-02 | 1.00 | 100.0000 |
| 1069 | 1053 | 3 | 2019-04-03 | 1.00 | 100.0000 |
| 1070 | 1053 | 2 | 2019-04-04 | 1.00 | 100.0000 |
| 1071 | 1053 | 4 | 2019-04-05 | 1.00 | 100.0000 |
| 1072 | 1053 | 4 | 2019-04-06 | 1.00 | 100.0000 |
| 1089 | 1078 | 1006 | 2019-04-05 | 1.00 | 100.0000 |
| 1090 | 1079 | 1006 | 2019-04-05 | 12.00 | 1200.0000 |
| 1091 | 1080 | 4 | 2019-04-02 | 1.00 | 100.0000 |
| 1092 | 1080 | 4 | 2019-04-03 | 1.00 | 100.0000 |
| 1093 | 1080 | 4 | 2019-04-04 | 1.00 | 100.0000 |
| 1094 | 1080 | 4 | 2019-04-05 | 1.00 | 100.0000 |
| 1095 | 1080 | 4 | 2019-04-06 | 1.00 | 100.0000 |
+----------------------+------------------+---------------------+------------+--------+-------------+
从这两张表中，我想要下面的结果
+------------------+--------------+---------------+------------+----------+-------------------------+--------------------+------------+--------+
| ContractorBillId | ContractorId | BillNo | BillDate |IsDeleted | UpdatedDate | ContractorPayTypeId| WeekEnding | Hours |
+------------------+--------------+---------------+------------+----------+-------------------------+--------------------+------------+--------+
| 1050 | 2 | 2-20190329-W | 2019-03-29 | 0 | 2019-03-29 13:53:51.447 | 2 | 2019-03-29 | 145.00 |
| 1051 | 2 | 2-20190329-W1 | 2019-03-29 | 0 | 2019-03-29 18:48:48.077 | 1 | 2019-03-29 | 50.00 |
| 1052 | 2 | 2-20190402-W | 2019-04-02 | 0 | 2019-04-02 15:54:16.267 | 1 | 2019-04-05 | 22.00 |
| 1053 | 1 | 1-20190402-E | 2019-04-02 | 0 | 2019-04-02 18:58:50.753 | 4 | 2019-04-02 | 5.00 |
| 1078 | 1 | 1-20190403-A | 2019-04-03 | 0 | 2019-04-03 10:59:18.083 | 1006 | 2019-04-05 | 1.00 |
| 1079 | 1 | 1-20190403-A1 | 2019-04-03 | 0 | 2019-04-03 11:00:37.197 | 1006 | 2019-04-05 | 12.00 |
| 1080 | 1 | 1-20190403-E | 2019-04-03 | 0 | 2019-04-03 11:33:41.333 | 4 | 2019-04-02 | 5.00 |
+------------------+--------------+---------------+------------+----------+-------------------------+--------------------+------------+--------+
请帮助我生成查询。结果，在明细表中，小时和总金额应该是总和，而ContractorPayTypeId和WeekEnding应该是所有项目的首位。
答案 0 :(得分：1)
您可以使用高级SQL查询，例如SUM（）OVER PARTITION BY，FIRST_VALUE（）ETC。
SELECT BillTable.* ,
CS.SumGrossAmount ,
CS.SumHours ,
CS.FirstWeekEnding ,
CS.FirstContractorPayTypeId
FROM dbo.BillTable
CROSS APPLY
( SELECT TOP 1 S.SumGrossAmount ,
S.SumHours ,
S.FirstWeekEnding ,
S.FirstContractorPayTypeId
FROM ( SELECT * ,
SUM(GrossAmount) OVER ( PARTITION BY ContractorBillId
ORDER BY ContractorBillItemId
) AS SumGrossAmount ,
SUM(Hours) OVER ( PARTITION BY ContractorBillId
ORDER BY ContractorBillItemId
) AS [SumHours] ,
FIRST_VALUE(WeekEnding) OVER ( PARTITION BY ContractorBillId
ORDER BY ContractorBillItemId
) AS [FirstWeekEnding] ,
FIRST_VALUE(ContractorPayTypeId) OVER ( PARTITION BY ContractorBillId
ORDER BY ContractorBillItemId
) AS [FirstContractorPayTypeId]
FROM dbo.BillDetail
) S
WHERE S.ContractorBillId = dbo.BillTable.ContractorBillId
ORDER BY S.ContractorBillItemId DESC
) CS;