Data Access Page Connection Error
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connecting to (importing) data Applies To: Excel 2010, Less Applies To: Excel 2010 , More... Which version do I have? More... This reference article discusses importing and connecting data. You will learn about tasks like importing, updating, securing, and managing data. In this article Working with external data connections Refreshing data Importing data from data sources Making data access more secure Issues about connecting to data Working with external data connections The following sections discuss how external data connections work, and how to find edit, manage, and share the connection information with other programs and users. Top of Page Understanding the basics of data connections Data in an Excel workbook can come from two different locations. The data may be stored directly in the workbook, or it may be stored in an external data source, such as a text file, a database, or an Online Analytical Processing (OLAP) cube. This external data source is connected to the workbook through a data connection, which is a set of information that describes how to locate, log in to, and access the external data source. The main benefit of connecting to external data is that you can periodically analyze this data without repeatedly copying the data to your workbook, which is an operation that can be time consuming and prone to error. After connecting to external data, you can also automatically refresh (or update) your Excel workbooks from the original data source whenever the data source is updated with new information. Connection information is stored in the workbook and can also be stored in a connection file, such as an Office Data Connection (ODC) file (.odc) or a Data Source Name file (.dsn). To bring external data into Excel, you need access to the data. If the external data source that you want to access is not on your local computer, you may need to contact the administrator of the database for a password, user permissions, or other connection information. If the data source is a database, make sure that the database is not opened in exclusive mode. If the data source is a text file or a spreadsheet, make sure that another user does not have it open for exclusive access. Many data sources also require an ODBC driver or OLE DB provider to coordinate the flow of data between Excel, the connection file, and the data source. The following diagram summarizes the key points about data connections. 1. There are a variety of data sources that you can connect to: Analysis Services, SQL Server, Microsoft Access, other OLAP and relational databases, spreadsheets, and text files. 2. Many data sources have