SQL 查找过去 45 天内没有收款活动的帐户

Question

我有一个练习管理软件，可以将不同的活动存储在不同的表格中。 下面列出。我试图完成的目标是找到有到期余额、处于休眠状态或在过去 30 天内没有任何活动的账户。活动类型包括索赔提交、付款和分类帐单。我通过 exel 中的五个查询和 Vlookup 功能实现了这一点。但是我想用一个 sql 查询干净地做到这一点。可能吗。以下是我目前使用的五个查询。

SELECT xrxTrnLgr.PatId, xrxTrnLgr.Balance, 
FROM xrxTrnLgr
WHERE (xrxTrnLgr.Balance>$.01)
ORDER BY xrxTrnLgr.PatId  

这个查询是为了得到有余额的病人

SELECT xrxPat.PatId, xrxPat.Coverage, xrxPat.DctId, xrxPat.EntryDate
FROM  xrxPat
WHERE (xrxPat.EntryDate>{ts '2008-01-01 00:00:00'})
ORDER BY xrxPat.PatId

此查询用于获取医生 ID

SELECT RecNo, xrxPatNotes.PatId, xrxPatNotes.NoteDate, xrxPatNotes.UserId
FROM xrxPatNotes INNER JOIN
(SELECT xrxPatNotes.PatId, Max (NoteDate) as LastDate
FROM xrxPatNotes
GROUP BY PatId) as B
ON xrxPatNotes.PatId = B.PatId
AND xrxPatNotes.NoteDate = B.LastDate

这个查询是为了获取最近的账本注释

SELECT xrxTrnicf.PatId,  xrxTrnicf.UserId  ,xrxTrnicf.PostDate
FROM   xrxTrnicf INNER JOIN
(SELECT xrxTrnicf.PatId, Max (PostDate) as LastDate
FROM  xrxTrnicf
GROUP BY PatId) as B
ON xrxTrnicf.PatId = B.PatId
AND xrxTrnicf.PostDate = B.LastDat

这个查询是为了获取最近提交的索赔

SELECT xrxTrnpay.PatId,  xrxTrnpay.UserId  ,xrxTrnpay.PostDate
FROM   xrxTrnpay INNER JOIN
(SELECT xrxTrnpay.PatId, Max (PostDate) as LastDate
FROM  xrxTrnpay
GROUP BY PatId) as B
ON xrxTrnpay.PatId = B.PatId
AND xrxTrnpay.PostDate = B.LastDate

这个查询是为了获取最近的付款

在 exel 中，我然后 VLOOKUP 所有值并从今天减去。然后我创建一个列来获取最小值。

如果有人可以帮助我至少将 sql 查询合并到一个查询中，我将不胜感激。

谢谢

Answer 1

您可以使用 5 路联合。它相当冗长，但它会成功。请注意，它仍然使用五个选择，所以它不会更有效率（事实上，我怀疑它可能效率较低）。它只允许一个查询和一个结果集：

SELECT PatId,
  'xrxTrnLgr' AS tablename,
  'Balance' AS key1, Balance AS value1,
  NULL AS key2, NULL AS value2,
  NULL AS key3, NULL AS value3
FROM xrxTrnLgr
WHERE (xrxTrnLgr.Balance>$.01)
UNION ALL
SELECT PatId,
  'xrxPat' AS tablename,
  'Coverage' AS key1, Coverage AS value1,
  'DctId' AS key2, DctId AS value2,
  'EntryDate' AS key3, EntryDate AS value3
FROM  xrxPat
WHERE (xrxPat.EntryDate>{ts '2008-01-01 00:00:00'})
UNION ALL
SELECT PatId,
  'xrxPatNotes' AS tablename,
  'RecNo' AS key1, RecNo AS value1,
  'NoteDate' AS key2, NoteDate AS value2,
  'UserId' AS key3, UserId AS value3
FROM xrxPatNotes INNER JOIN
(SELECT xrxPatNotes.PatId, Max (NoteDate) as LastDate
FROM xrxPatNotes
GROUP BY PatId) as B
ON xrxPatNotes.PatId = B.PatId
AND xrxPatNotes.NoteDate = B.LastDate
UNION ALL
SELECT PatId,
  'xrxTrnicf' AS tablename,
  'UserId' AS key1, UserId AS value1,
  'PostDate' AS key2, PostDate AS value2,
  NULL AS key3, NULL AS value3
FROM   xrxTrnicf INNER JOIN
(SELECT xrxTrnicf.PatId, Max (PostDate) as LastDate
FROM  xrxTrnicf
GROUP BY PatId) as B
ON xrxTrnicf.PatId = B.PatId
AND xrxTrnicf.PostDate = B.LastDat
UNION ALL
SELECT PatId,
  'xrxTrnpay' AS tablename,
  'UserId' AS key1, UserId AS value1,
  'PostDate' AS key2, PostDate AS value2,
  NULL AS key3, NULL AS value3
FROM   xrxTrnpay INNER JOIN
(SELECT xrxTrnpay.PatId, Max (PostDate) as LastDate
FROM  xrxTrnpay
GROUP BY PatId) as B
ON xrxTrnpay.PatId = B.PatId
AND xrxTrnpay.PostDate = B.LastDate
ORDER BY PatId  

这将返回一个包含列（tablename、PatId、key1、value1、key2、value2、key3、value3）的结果集。 tablename 结果将告诉您如何解释键/值对结果。