The default value is RUW. The Defer Prepare instructs the Data provider to combine the parameter prepare with command execute, to reduce the number of network flows and improve performance of parameterized commands. This optional attribute accepts a Boolean value.
The default value is false. This optional attribute accepts an integer value. The default value is Skip to main content.
This browser is no longer supported. Download Microsoft Edge More info. Contents Exit focus mode. Is this page helpful? Please rate your experience Yes No. Any additional feedback? In this article. User DSNs are local to a computer and can be used only by the current user. System DSNs are local to a computer rather than dedicated to a user.
The system or any user with privileges can use a data source set up with a system DSN. File DSNs are file-based sources that can be shared among all users who have the same drivers installed and therefore have access to the database. These data sources need not be dedicated to a user nor be local to a computer. File data source names are not identified by dedicated registry entries; instead, they are identified by a file name with a. The driver now displays one or more driver-specific screens where you enter the info needed to connect to your data source.
For the SQL Server driver, for example, there are four pages of custom settings. After you finish, the new system DSN appears in the list. Continue to the next step of the wizard.
If you want to provide your connection information with a connection string, the rest of this topic helps you get the connection string you need.
This example is going to use the following connection string, which connects to Microsoft SQL Server. After you enter the connection string, the wizard parses the string and displays the individual properties and their values in the list. The connection options for an ODBC driver are the same whether you're configuring your source or your destination.
That is, the options you see are the same on both the Choose a Data Source and the Choose a Destination pages of the wizard. This third-party site contains sample connection strings and more info about data providers and the connection info they require. This requires several steps, but helps to make sure you have a valid connection string.
Remember where you save the file so you can find it and open it in a subsequent step. After you click Finish , the driver that you selected displays one or more proprietary screens to gather the info it needs to connect.
Typically this info includes server, login info, and database for server-based data sources, and file, format, and version for file-based data sources. After you configure your data source and click Finish , you typically see a summary of your selections and have an opportunity to test them.
After you test your data source and close the dialog boxes, find the File DSN where you saved it in the file system. If you didn't change the file extension, the default extension is. Open the saved file with Notepad or another text editor. Here are the contents of our SQL Server example. Learn more. Asked 5 years, 8 months ago. Active 5 years, 8 months ago.
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