TAILIEUCHUNG - Microsoft SQL Server 2000 Data Transformation Services- P5

Microsoft SQL Server 2000 Data Transformation Services- P5: Data Transformation Services in Microsoft SQL Server 2000 is a powerful tool for moving data. It’s easy to use, especially when you’re creating transformation packages with the DTS Wizard. But it’s also a flexible tool that you can customize to gain a high degree of control over the transformation of your data. | DTS Connections and the Data Transformation Tasks 176 Part II Figure You can change your Transform Data tasks to the freestanding icon. Note Whenever you create a new task using the Package Designer a step a task and an icon for the step task are all created at the same time. The Package Designer creates the icon that is appropriate for the particular custom task. After the point of creation that icon is attached to the Step object and not the Task object. You can switch the task associated with the step to another task. That s what you re doing when you change the Step s TaskName property. You can remove the Task object from the Package s Tasks collection. The step will still be displayed in the Package Designer with the icon that was originally assigned to it. The connection between step and icon remains when saving and loading the package from any type of storage except Visual Basic code. When you SaveToVB none of the visual representation of the package is saved. When you recreate the package by executing the saved code the default visual representation of the package is recreated. An icon is assigned to each step based on the task that is associated with that step in the VB code. Caution One more reminder. As far as I know there is no Microsoft documentation regarding the freestanding Transform Data task icon or on any of the information I have presented in this section. The Transform Data Task Chapter 6 177 Conclusion There s a lot to learn about the Transform Data task This has been a long chapter but there s still a lot more to learn about this task. The next chapter Writing ActiveX Scripts for a Transform Data Task shows you how to implement precise programmatic control in the row-by-row processing of your data. 6 The Transform Data .

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