SSIS containers are defined as a set of logically linked tasks that allows the management of the task scope effectively. Containers allow looping through tasks set until tasks are grouped logically or until specified criteria are met. Nesting of containers is also allowed and the containers are set in the Package designer section in the Control flow tab. The following containers are present in SSIS: Task Host Containers: Default container where all single tasks are available and are used for background scenes in SSIS. This is not present in the toolbox of Visual Studio and is assigned to the task implicitly. This container is also used to extend event handlers and variables. Sequence Containers: These handle the flow of package subset and helps to divide packages into smaller pieces. These are displayed in the Control Flow tab. We can drag and drop containers from the toolbox in the design pane and then add a set of tasks into the container. Following things can be ac...
Import Column Transformation – The Import Column transformation reads data from files and adds the data to columns in a data flow. Using this transformation, a package can add text and images stored in separate files to a data flow. * Export Column Transformation – The Export Column transformation reads data in a data flow and inserts the data into a file. *
Below are the lists of various types of enumerators provided by SSIS Foreach Loop Container: Foreach File Enumerator : It enumerates files in a folder. The plus point here is it can traverse through subfolders also. Foreach Item Enumerator : It enumerates items in a collection. Like enumerating rows and columns in an Excel sheet. Foreach ADO Enumerator : Useful for enumerating rows in tables. Foreach ADO.NET Schema Rowset Enumerator : To enumerate through schema information about a data source. For example, to get list of tables in a database. Foreach From Variable Enumerator : Used to enumerate through the object contained in a variable. (if the object is enumerable) Foreach NodeList Enumerator : Used to enumerate the result set of an XML Path Language (XPath) expression. Foreach SMO Enumerator : It enumerates through SQL Server Management Objects (SMO) objects.
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