ActiveX Data Objects

ActiveX Data Objects

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ActiveX Data Objects (ADO) is a data access technology developed by Microsoft. It provides a set of components and objects that enable developers to access and manipulate data from various data sources, such as databases, spreadsheets, and text files.

ADO simplifies the process of retrieving, updating, and manipulating data by providing a consistent and uniform programming interface. It abstracts the underlying data source and provides a common set of methods, properties, and events that developers can use to interact with the data.

Some key features of ADO include:

  1. Data Source Connectivity: ADO supports a wide range of data sources, including Microsoft SQL Server, Oracle, MySQL, Excel, Access, and more. It provides connectivity options such as OLE DB and ODBC to establish connections to these data sources.
  2. Data Retrieval and Manipulation: ADO allows developers to execute SQL queries and retrieve data from the data source. It provides methods for inserting, updating, and deleting data, as well as navigating through recordsets and performing filtering, sorting, and aggregation operations.
  3. Data Binding: ADO supports data binding, which enables developers to bind data directly to user interface controls such as grids, lists, and forms. This allows for automatic synchronization of data between the user interface and the underlying data source.
  4. Transaction Management: ADO supports transactional operations, allowing developers to group multiple database operations into a single transaction. This ensures data integrity and consistency by providing atomicity, consistency, isolation, and durability (ACID) properties.
  5. Error Handling and Event Model: ADO provides robust error handling capabilities, allowing developers to handle exceptions and errors that may occur during data access operations. It also supports an event-driven model, where developers can respond to various events triggered by ADO components.

ADO is widely used in Windows-based applications and is supported by multiple programming languages, including Visual Basic, C++, and .NET languages. It provides a flexible and efficient way to work with data, making it a popular choice for database access and manipulation in various application scenarios.

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