回答編集履歴
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説明の改善
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@@ -27,6 +27,14 @@
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外部データベース用のDCount関数、DLookup関数
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DCount関数、DLookup関数とまったく同じ仕様なので、
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下記のコードを標準モジュールにコピーして、
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VBAエディターで DCount を MyDCount に置換、DLookup を MyDLoouup に置換するだけです。
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@@ -19,3 +19,75 @@
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[テーブルデータを保護する - hatena chips](https://hatenachips.blog.fc2.com/blog-entry-351.html)
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---
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外部データベース用のDCount関数、DLookup関数
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```vba
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Option Compare Database
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Option Explicit
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Const Inku = " IN '' [Ms Access;PWD=1234;DATABASE=C:\DBProtectBackEnd.ACCDB;]" '外部データベース接続文字列
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Public Function MyDCount(Expr As String, Domain As String, Optional Criteria As String)
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Dim strSQL As String
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strSQL = "SELECT Count(" & Expr & ") FROM " & Domain & Inku
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If Criteria <> "" Then
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strSQL = strSQL & " WHERE " & Criteria
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End If
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Dim rs As DAO.Recordset
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Set rs = CurrentDb.OpenRecordset(strSQL, dbOpenForwardOnly, dbReadOnly)
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MyDCount = rs(0)
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End Function
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Public Function MyDLookup(Expr As String, Domain As String, Optional Criteria As String)
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Dim strSQL As String
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strSQL = "SELECT " & Expr & " FROM " & Domain ' & Inku
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If Criteria <> "" Then
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strSQL = strSQL & " WHERE " & Criteria
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End If
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Dim rs As DAO.Recordset
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Set rs = CurrentDb.OpenRecordset(strSQL, dbOpenForwardOnly, dbReadOnly)
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MyDLookup = rs(0)
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End Function
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```
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