Parameters typically have the format .) With the parameter defined, its value can be set programmatically prior to executing the statement. NET code, you know that when writing code to issue a query to a database you create a command object (such as collection that allows you to programmatically specify the values for the parameters defined in the query (or used in the stored procedure).
For more information on using parameterized queries with SQL Server see this article; for examples for parameterized queries with Microsoft Access, refer to this one.
In short, the data source control is executing the same ADO.
NET code you likely would if you were accessing the data programmatically.
We'll see how to specify different types of parameter values in a bit.
If you use the "Specify a custom SQL statement or stored procedure" option you can either type in a SQL query by hand or pick a stored procedure from a drop-down list.
NET 2.0 introduced a number of new Web controls designed for accessing and modifying data.
The Sql Data Source and Access Data Source controls can define the value by which the query is filtered by using parameters, and these parameters can retrieve their values from a variety of sources, including: the querystring, session variables, other Web controls on the page, and so on.FEMA oversees the National Flood Insurance Program (NFIP) which makes federally administered flood insurance available throughout the United States and is responsible for development, updates and making the form available to users.FEMA recommends that users of the form be given a transition period through October 2018 to move to the new version of the form.That is, with these two properties, after the records have been returned from the backend database, these results are further filtered by the , on the other hand, performs the filtering on the database side.As you probably can guess, filtering on the database side is much more efficient than bringing back all data to the data source control and then having it filter the results.