让Access执行用户手工输入的SQL资源-CSDN文库

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h：5个

cpp：4个

bmp：3个

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在Microsoft Access中，虽然默认界面并不直接支持用户输入并执行SQL语句，但可以通过编程接口实现这一功能。这里提到的“让Access执行用户手工输入的SQL”是指利用数据访问对象（DAO）技术来扩展Access的功能，允许用户输入SQL命令并由Access数据库执行。DAO是Access与Jet数据库引擎进行交互的主要API，提供了对数据库对象如表、查询、记录等的低级别访问。我们需要了解什么是DAO。DAO全称是Data Access Objects，它是Microsoft Jet数据库引擎的一部分，用于创建和管理数据库对象以及执行SQL语句。DAO提供了一种面向对象的方式来操作数据库，包括创建、修改和删除数据库对象，以及执行SQL命令。要让Access执行用户手工输入的SQL，我们通常需要编写VBA（Visual Basic for Applications）代码。以下是一个简单的示例，展示了如何在VBA中使用DAO执行用户输入的SQL： 1. 在VBA编辑器中，创建一个新的模块，并导入DAO库： ```vba Private Sub Module1_Initialize() ' 引入DAO库 Dim daoDB As DAO.Database Set daoDB = CurrentDb End Sub ``` 2. 创建一个用户界面，比如一个对话框，让用户输入SQL语句。假设有一个名为`txtSQL`的文本框控件，可以读取用户的输入： ```vba Dim sqlStatement As String sqlStatement = txtSQL.Value ``` 3. 使用DAO的`Execute`方法执行SQL语句： ```vba ' 创建一个DAO的Recordset对象 Dim rs As DAO.Recordset ' 执行用户输入的SQL On Error GoTo ErrorHandler Set rs = daoDB.OpenRecordset(sqlStatement, dbOpenDynaset) ' 如果SQL是INSERT、UPDATE或DELETE等非查询语句，Recordset不会返回结果 If Not (rs.EOF And rs.BOF) Then ' 如果有结果，处理Recordset rs.Close End If Set rs = Nothing Exit Sub ErrorHandler: MsgBox "错误: " & Err.Description, vbExclamation, "SQL执行错误" Set rs = Nothing End Sub ``` 在这个例子中，`dbOpenDynaset`参数表示我们希望打开一个动态集，这样可以处理查询结果。如果用户输入的是DML语句（如INSERT、UPDATE或DELETE），则Recordset不会返回结果，但我们仍然可以检查错误。请注意，直接执行用户输入的SQL可能存在安全风险，如SQL注入攻击。因此，应该对用户输入进行验证和清理，确保它们不包含有害的SQL代码。在实际应用中，我们可能还需要考虑以下方面： - 错误处理：使用`On Error`结构捕获并处理可能出现的错误。 - 用户权限：限制用户只能执行他们被授权的SQL操作。 - 性能优化：避免执行过于复杂的SQL语句，以保持良好的系统性能。 - 日志记录：记录执行的SQL语句和结果，便于调试和审计。通过DAO技术，我们可以扩展Access的功能，使其能够执行用户手工输入的SQL语句，从而实现更灵活的数据操作。这为Access数据库的使用提供了更大的便利性和灵活性，但也需要谨慎处理潜在的安全问题。

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Access执行sql.rar （20个子文件）

Access执行sql

StdAfx.cpp 215B

resource.h 1KB

access执行sql.dsp 4KB

access执行sql.rc 6KB

access执行sql.clw 2KB

HelpDialog.h 1KB

access执行sqlDlg.cpp 7KB

SQL例句.txt 186B

access执行sql.dsw 551B

ReadMe.txt 4KB

StdAfx.h 1KB

access执行sql.cpp 2KB

access执行sqlDlg.h 2KB

res

ice.bmp 48KB

1.ico 51KB

access执行sql.rc2 405B

psp.bmp 113KB

lengque.bmp 3KB

access执行sql.h 1KB

HelpDialog.cpp 2KB

======================================================================== MICROSOFT FOUNDATION CLASS LIBRARY : access执行sql ======================================================================== AppWizard has created this access执行sql application for you. This application not only demonstrates the basics of using the Microsoft Foundation classes but is also a starting point for writing your application. This file contains a summary of what you will find in each of the files that make up your access执行sql application. access执行sql.dsp This file (the project file) contains information at the project level and is used to build a single project or subproject. Other users can share the project (.dsp) file, but they should export the makefiles locally. access执行sql.h This is the main header file for the application. It includes other project specific headers (including Resource.h) and declares the CAccesssqlApp application class. access执行sql.cpp This is the main application source file that contains the application class CAccesssqlApp. access执行sql.rc This is a listing of all of the Microsoft Windows resources that the program uses. It includes the icons, bitmaps, and cursors that are stored in the RES subdirectory. This file can be directly edited in Microsoft Visual C++. access执行sql.clw This file contains information used by ClassWizard to edit existing classes or add new classes. ClassWizard also uses this file to store information needed to create and edit message maps and dialog data maps and to create prototype member functions. res\access执行sql.ico This is an icon file, which is used as the application's icon. This icon is included by the main resource file access执行sql.rc. res\access执行sql.rc2 This file contains resources that are not edited by Microsoft Visual C++. You should place all resources not editable by the resource editor in this file. ///////////////////////////////////////////////////////////////////////////// AppWizard creates one dialog class: access执行sqlDlg.h, access执行sqlDlg.cpp - the dialog These files contain your CAccesssqlDlg class. This class defines the behavior of your application's main dialog. The dialog's template is in access执行sql.rc, which can be edited in Microsoft Visual C++. ///////////////////////////////////////////////////////////////////////////// Other standard files: StdAfx.h, StdAfx.cpp These files are used to build a precompiled header (PCH) file named access执行sql.pch and a precompiled types file named StdAfx.obj. Resource.h This is the standard header file, which defines new resource IDs. Microsoft Visual C++ reads and updates this file. ///////////////////////////////////////////////////////////////////////////// Other notes: AppWizard uses "TODO:" to indicate parts of the source code you should add to or customize. If your application uses MFC in a shared DLL, and your application is in a language other than the operating system's current language, you will need to copy the corresponding localized resources MFC42XXX.DLL from the Microsoft Visual C++ CD-ROM onto the system or system32 directory, and rename it to be MFCLOC.DLL. ("XXX" stands for the language abbreviation. For example, MFC42DEU.DLL contains resources translated to German.) If you don't do this, some of the UI elements of your application will remain in the language of the operating system. /////////////////////////////////////////////////////////////////////////////

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