在1个表中加入2条记录，在另一个表中记录2条记录以产生2条记录

Question

我有2个需要加入大量数据的表。问题在于2个表大部分保持相同的数据，并且连接有时会产生不希望的，但并不意外。结果。这里有一个例子：

week_end_date nugly payroll_code rate  hours  check_number 
-------------------------------------------------------------- 
2010-01-17  AU9T8K HRLY-W  13.00000 40.00000 530957    
2010-01-17  AU9T8K HRLY-W  13.00000 40.00000 DD00000105382 

week_end_date nugly trx_number pay_code hours rate 
2010-01-17 AU9T8K ETS00000010771815 HRLY-W 40.00000 13.00000 
2010-01-17 AU9T8K ETS00000010771684 HRLY-W 40.00000 13.00000 

我期待的支票＃和trx_number相结合的加盟，但我结束了一个交叉连接，因为一切是我参加的是相同的。对于每一个我喜欢这种情况的人，我真的不在乎trx_number最终与哪个check＃相关。

有什么想法？

以下是目前的结果：

week_end_date nugly payroll_code rate hours check_number trx_number 
2010-01-17 AU9T8K HRLY-W 13.00000 40.00000 DD00000105382   ETS00000010771815 
2010-01-17 AU9T8K HRLY-W 13.00000 40.00000 530957     ETS00000010771815 
2010-01-17 AU9T8K HRLY-W 13.00000 40.00000 DD00000105382   ETS00000010771684 
2010-01-17 AU9T8K HRLY-W 13.00000 40.00000 530957     ETS00000010771684 

我想的是：

week_end_date nugly payroll_code rate hours check_number trx_number 
2010-01-17 AU9T8K HRLY-W 13.00000 40.00000 DD00000105382   ETS00000010771815 
2010-01-17 AU9T8K HRLY-W 13.00000 40.00000 530957     ETS00000010771684 

在哪里我真的不关心这trx_number是与check_number。

这里是我当前的查询：

SELECT c.week_end_date, c.nugly, c.payroll_code, c.rate, c.hours, c.check_number, t.trx_number 
    FROM checksByNuglyPaycode c 
    LEFT OUTER JOIN trxNumByNuglyPaycode t ON c.db_id = t.db_id AND c.fridate = t.fridate 
     AND c.nugly = t.nugly AND c.trx_type = t.trx_type AND c.payroll_code = t.pay_code 
     AND c.hours = t.hours AND c.rate = t.rate AND c.week_end_date = t.week_end_date 
    WHERE t.db_id = 'lal' AND c.nugly = 'AU9T8K' AND c.payroll_code = 'HRLY-W' 
     AND c.fridate = '2010-01-22' AND c.week_end_date = '2010-01-17' 
ORDER BY c.fridate, c.nugly, payroll_code 

where子句显然是专门为这种情况下，在最后的查询，不会有一个where子句。

Answer 1

这是一个猜测，但你可以使用类似ROW_NUMBER为每个表格创建一个标识字段然后加入他们？

喜欢的东西

CREATE VIEW vwOrderedTable1 
AS 
SELECT ROW_NUMBER() OVER(ORDER BY week_end_date) AS 'RowNumber', 
    week_end_date, 
    nugly, 
    payroll_code... 
FROM Table1 
GO 

CREATE VIEW vwOrderedTable2 
AS 
SELECT ROW_NUMBER() OVER(ORDER BY week_end_date) AS 'RowNumber', 
    week_end_date, 
    nugly, 
    'payroll_code' = pay_code... 
FROM Table2 
GO 

SELECT * 
FROM vwOrderedTable1 
INNER JOIN vwOrderedTable2 ON vwOrderedTable1.RowNumber = vwOrderedTable2.RowNumber 

Answer 2

您能否提供更多信息？你目前的查询是什么样的？表格结构如何？你想加入钥匙吗？

你提到你“看”检查＃和trx_number ...这些结果？

你有没有一个例子说明你所提供的行会返回什么？

---

我喜欢Alex的回答，它似乎很稳固。

也许是一个愚蠢的评论，但如果你不关心你得到了什么trx_number，并且在你的示例查询中你使用了一个左连接，这意味着你只想要所有来自checksByNuglyPaycode的数据，为什么你加入两张桌子？你需要两张表的所有数据吗？更像是一个完整的外连接？

因此，如果在checksByNuglyPaycode中有一个不在trxNumByNuglyPaycode中的记录，您需要它吗？

如果在trxNumByNuglyPaycode中有记录，而不在checksByNuglyPaycode中，您需要这样吗？

---

有趣的是，如果你想从两个表的所有数据，你可以使用下面的选择。注意：它采用独特这将可能是缓慢的，而且我认为全外连接，也可以慢......它已经很长一段时间...

SELECT DISTINCT 
    ISNULL(c.week_end_date, t.week_end_date), ISNULL(c.nugly,t.nugly), 
    ISNULL(c.payroll_code,t.payroll_code), ISNULL(c.rate,t.rate), 
    ISNULL(c.hours, t.hours), c.check_number, t.trx_number 
FROM 
    checksByNuglyPaycode c 
FULL OUTER JOIN 
    trxNumByNuglyPaycode t ON c.db_id = t.db_id 
          AND c.fridate = t.fridate 
          AND c.nugly = t.nugly 
          AND c.trx_type = t.trx_type 
          AND c.payroll_code = t.pay_code 
          AND c.hours = t.hours 
          AND c.rate = t.rate 
          AND c.week_end_date = t.week_end_date 
ORDER BY 
    c.fridate, c.nugly, payroll_code 

Answer 3

什么像你已经有了作为一个子查询包裹着查询：

SELECT MAX(trx_number), week_end_date, nugly, payroll_code, rate, hours, check_number 
FROM 
(
    QUERY_YOU_ALREADY_HAVE 
) tbl 
GROUP BY week_end_date, nugly, payroll_code, rate, hours, check_number