How Can SSIS Efficiently Load Multiple Text Files with Identical Names and Schemas into a SQL Server Database?

Loading Files with Identical Schemas and Names into a Database

In SQL Server 2008 database, importing multiple text files with the same name and schema into the same table can be challenging due to their varying locations. However, SSIS offers a solution to streamline this process.

Using SSIS's Foreach File Container

To achieve this task in SSIS, you can utilize the Foreach File Container. This container allows you to iterate through multiple files, including those in different directories. By enabling the "Traverse Subfolder" option, the container will automatically process files within any nested subdirectories.

Configuring the Foreach File Container

1. Right-click on the SSIS package and select "New Container > Foreach File Container."
2. In the "Properties" window, set the "File Type" to "Text Files (.)."
3. Check the "Traverse Subfolder" checkbox to include all files in subdirectories.
4. Specify the "Root Folder" that contains the parent directory of the text files.
5. Click the "Variable Mappings" tab and create a user-defined variable to store the current file path.

Connecting the Flat File Source to the Variable

1. Connect a Flat File Source to the Foreach File Container.
2. In the Flat File Source's "Properties" window, assign an expression to the "Connection String" property.

3. Use the following expression to dynamically update the connection string based on the current file path:

   "Data Source=[local database server];Database=[database name];Trusted_Connection=True;Connection Timeout=120;File Name=[User::VariableName]"

   Replace "[User::VariableName]" with the name of the user-defined variable created in Step 5 above.

Processing the Files

1. Within the Foreach File Container, add a Data Flow Task.
2. In the Data Flow Task, map the Flat File Source to a suitable destination, such as an OLE DB Destination or a Data Table.
3. Execute the package and observe the data being loaded into the target table from all the text files.

By using SSIS's Foreach File Container and customizing the Flat File Source's connection string, you can efficiently import multiple text files with the same name and schema into a database, regardless of their directory locations.

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