Sql 调用另外两个查询的查询
我正在Access 2010数据库中编写一个查询,它调用同一Access 2010数据库中的另外两个查询。结果将是具有以下字段的表格报告:Sql 调用另外两个查询的查询,sql,ms-access,ms-access-2010,Sql,Ms Access,Ms Access 2010,我正在Access 2010数据库中编写一个查询,它调用同一Access 2010数据库中的另外两个查询。结果将是具有以下字段的表格报告: FirstName, LastName, HomePhone, ClientNumber, Level, nextDate, Type 客户/行列表由Query1生成,Query1还填充FirstName、LastName、HomePhone和Client Number。然后,Query2为上面第一个查询中定义的每个客户行填充Level、nextDate
FirstName, LastName, HomePhone, ClientNumber, Level, nextDate, Type
客户/行列表由Query1生成,Query1还填充FirstName、LastName、HomePhone和Client Number。然后,Query2为上面第一个查询中定义的每个客户行填充Level、nextDate和Type
到目前为止,我得到的摘要查询是:
SELECT Query1.FirstName, Query1.LastName, Query1.HomePhone, Query1.ClientNumber, Query2.[Level], Query2.nextDate, Query2.Type
FROM Query1
INNER JOIN Query2 ON Query1.ClientNumber=Query2.ClientNumber;
但是,当我尝试在“数据表”视图中查看此摘要查询的结果时,Access会显示一个对话框,询问Query2.ClientNumber,这表明代码中的某些内容没有正确引用该变量
以下是查询1的代码,以供参考:
SELECT ActiveCustomers.FirstName, ActiveCustomers.LastName, tblClientAddress.HomePhone, ActiveCustomers.ClientNumber
FROM
(
SELECT Clients.ClientNumber, Clients.FirstName, Clients.LastName
(
SELECT COUNT(ReferralDate) FROM IntakeTable WHERE Clients.ClientNumber = IntakeTable.ClientNumber AND Len(ReferralDate & '') > 0
) AS IntakeCount,
(
SELECT COUNT(ExitDate) FROM ExitTable WHERE Clients.ClientNumber = ExitTable.ClientNumber AND Len(ExitDate & '') > 0
) AS ExitCount
FROM Clients
) AS ActiveCustomers
INNER JOIN tblClientAddress ON ActiveCustomers.ClientNumber=tblClientAddress.ClientNumber
WHERE IntakeCount > ExitCount AND tblClientAddress.CurrentResidence = True;
下面是查询2的代码:
SELECT a.[Level], max(a.dte) AS nextDate, IIf([Type1Date]<[Type2Date],"t1","t2") AS [Type]
FROM (
select [Level], Type1Date as dte
FROM CommunicationTable WHERE ClientNumber=1
UNION
select [Level], Type2Date as dte
FROM CommunicationTable WHERE ClientNumber = 1
) AS a
GROUP BY a.[Level], IIf(a.[Type1Date]<a.[Type2Date],"t1","t2");
选择一个[Level],max(a.dte)作为nextDate,IIf([Type1Date]当您加入并嵌套这样的查询时,它有助于描述哪些内容被“公开”给外部查询。Query2
有一个嵌套的查询,a
,它不公开ClientNumber
,因此Query2
不能(也不尝试)向联接公开ClientNumber
。对Query2
尝试此操作:
SELECT a.[Level], max(a.dte) AS nextDate, IIf([Type1Date]<[Type2Date],"t1","t2") AS [Type], a.ClientNumber
FROM (
select [Level], Type1Date as dte, ClientNumber
FROM CommunicationTable WHERE ClientNumber=1
UNION
select [Level], Type2Date as dte
FROM CommunicationTable WHERE ClientNumber = 1
) AS a
GROUP BY a.[Level], IIf(a.[Type1Date]<a.[Type2Date],"t1","t2");
选择[Level],max(a.dte)作为下一个日期,IIf([Type1Date]谢谢。+1提供了一个很好的建议。但它比这更细微。Query2表示其中ClientNumber=1。但是,WHERE条件中的ClientNumber值需要为每行更改,以便联接为Query1返回的每行列出填充值或空值。摘要查询现在输出空rows,但显示了所有7个字段的标签。您能建议一种方法来更改语法,用“WHERE ClientNumber=1”中Query1的变量替换1吗Query2的一部分?@CodeMed如您所述,Query2
的子查询中的WHERE子句只返回ClientNumber=1
的值。如果您想获得所有客户端的结果(ClientNumber值)您需要去掉那些WHERE子句并将ClientNumber添加到GROUPBY子句中。然后,Query2
将返回所有客户端的行,您可以使用(现在可见)当您在其他查询中引用Query2
时,ClientNumber字段将与其他表/查询联接。@GordThompson我想让您知道,非常感谢您的见解。谢谢。