访问-获取最新日期(如果列中包含另一值) [英] Access - Get latest date if column contains value from another one
本文介绍了访问-获取最新日期(如果列中包含另一值)的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着小编来一起学习吧!
问题描述
在Access中查询时,VBA功能出现问题.
我有一个表格" tbldata "
I'm having an issue with a VBA function for my query in Access.
I have a table "tbldata"
Equipment Last Inspection
420-413 2019-06-15
440-433 2019-06-15
402-483 2019-06-29
420-413 2019-12-12
和查询" qryunpair "
UnpairEquipment
420
413
440
433
402
483
我想要实现的是:
Equipment Latest Date
420 2019-12-12
413 2019-12-12
440 2019-06-15
433 2019-06-15
402 2019-06-29
483 2019-06-29
我编写了以下代码,但是当我运行它时,它没有返回任何值. 有解决办法吗?
I've made the following code, but when I ran it, it didn't return any values. Is there a solution to this?
Function typeinspection(Source As String) As String
Dim Rst As Recordset
Dim Rst2 As Recordset
Dim s As String
s = ""
Set Rst = CurrentDb.OpenRecordset("tbldata")
Set Rst2 = CurrentDb.OpenRecordset("qryunpair")
While Not Rst.EOF
If InStr(Source, Rst2.Fields("UnpairEquipment") > 0) Then _
s = Rst.Fields("Last Inspection")
Rst.MoveNext
Wend
Set Rst = Nothing
Set Rst2 = Nothing
typeinspection = s
End Function
推荐答案
如果您希望查询返回期望的结果,则可以使用运算符LIKE
将表和查询连接起来:
If you want a query that returns your expected results, you can join the table and the query with the use of the operator LIKE
:
SELECT q.UnpairEquipment AS Equipment, MAX([Last Inspection]) AS [Latest Date]
FROM qryunpair AS q INNER JOIN tbldata AS t
ON '-' + t.Equipment + '-' LIKE '*-' + q.UnpairEquipment + '-*'
GROUP BY q.UnpairEquipment
结果:
Equipment Latest Date
402 2019-06-29
413 2019-12-12
420 2019-12-12
433 2019-06-15
440 2019-06-15
483 2019-06-29
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