SSIS中Task grouping与Sequence Task的区别是什么？

Great question! Let’s break down how these two SSIS features differ, since they both let you bundle tasks but serve totally distinct purposes:

Core Functionality & Flow Control #

• Sequence Task: This is a functional container built for controlling execution flow. You can define priority constraints between tasks inside it (e.g., run Task B only if Task A succeeds, skip Task C if a variable meets a condition), and tasks execute in the logical order you set. It’s designed to build dependent, structured task streams.
• Task Grouping: This is purely for visual organization—it has zero flow control capabilities. Grouping tasks just lets you fold/unfold a set of tasks to keep your package interface clean. The grouped tasks still run independently, following their own individual priority constraints (the group itself doesn’t impact execution order at all). Think of it like putting files in a folder: the folder keeps things tidy, but each file works the same way it did outside.

Execution Context & Scoping #

• Sequence Task: Tasks inside a Sequence share a container context. You can apply transactions to the entire Sequence, set breakpoints at the container level, or limit variable scope to only the tasks inside the Sequence. If a task in the Sequence fails, you can configure error handling for the whole container.
• Task Grouping: Grouped tasks have no shared context. Each task remains an independent entity—you can’t apply transactions to the group, and variables/breakpoints are still tied to individual tasks. The group is just a visual wrapper, not an execution boundary.

Video Reference Confirmation #

As noted in the 4- Sql Server 2012 Implement Data Warehouse - Exam 70-463 video at 4:28:

Task grouping only provides a visual organization of tasks; it does not provide any execution control or scoping.

Quick Rule of Thumb #

Use a Sequence Task when you need to manage task dependencies, execution order, or shared context. Use Task Grouping only when you want to clean up your package’s UI without changing how tasks run.

内容的提问来源于stack exchange，提问作者variable