-SQL code to change a column data type
ALTER TABLE ???????
ALTER COLUMN DATETIME NOT NULL
-http://msdn.microsoft.com/en-us/library/ms139892.aspx (Intergration Services Tasks)
-In Integration Services, a source is the data flow component that makes data from different external data sources available to the other components in the data flow.
-The capabilities of transformations vary broadly. Transformations can perform tasks such as updating, summarizing, cleaning, merging, and distributing data.
-A destination is the data flow component that writes the data from a data flow to a specific data store, or creates an in-memory dataset.
-Sources have outputs, destinations have inputs, and transformations have both inputs and outputs. Additionally, many data flow components can be configured to use an error output.
Inputs
Destinations and transformations have inputs. An input contains one or more input columns, which can refer to external columns if the data flow component has been configured to use them. Inputs can be configured to monitor and control the flow of data: for example, you can specify if the component should fail in response to an error, ignore errors, or redirect error rows to the error output. You can also assign a description to the input or update the input name. In SSIS Designer, inputs are configured by using the Advanced Editor dialog box.
Outputs
Sources and transformations always have outputs. An output contains one or more output columns, which can refer to external columns if the data flow component has been configured to use them. Outputs can be configured to provide information useful to downstream processing of the data. For example, you can indicate whether the output is sorted. You can also provide a description for the output, or update the output name. In SSIS Designer, outputs are configured by using the Advanced Editor dialog box.
Error Outputs
Sources, destinations, and transformations can include error outputs. You can specify how the data flow component responds to errors in each input or column by using the Configure Error Output dialog box. If an error or data truncation occurs at run time and the data flow component is configured to redirect rows, the data rows with the error are sent to the error output. By default, an error output contains the output columns and two error columns: ErrorCode and ErrorColumn. The output columns contain the data from the row that failed, ErrorCode provides the error code, and ErrorColumn identifies the failing column.
