data flow from multiple source to single destinantion in SSIS - sql-server-2008

Question

I need to import the data from the multiple distributed database ( around 70 ) to the single source table .So how is it possible through SSIS 2008

Answer 1

Assuming that you can run the same query against each of the 70 source servers, you can use a ForEach Loop with a single Data Flow Task. The source connection manager's ConnectionString should be an expression using the loop variables.
Here's an example reading the INFORMATION_SCHEMA.COLUMNS view from multiple DBs. I created the following tables on my local instance:
<!-- language: lang-sql -->
CREATE TABLE [MultiDbDemo].[SourceConnections](
[DatabaseKey] [int] IDENTITY(1,1) NOT NULL,
[ServerName] [varchar](50) NOT NULL,
[DatabaseName] [varchar](50) NOT NULL,
CONSTRAINT [PK_SourceConnections] PRIMARY KEY CLUSTERED
(
[DatabaseKey] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
CREATE TABLE [MultiDbDemo].[SourceColumns](
[ColumnKey] [int] IDENTITY(1,1) NOT NULL,
[ServerName] [varchar](50) NOT NULL,
[DatabaseName] [varchar](50) NOT NULL,
[SchemaName] [varchar](50) NOT NULL,
[TableName] [varchar](50) NOT NULL,
[ColumnName] [varchar](50) NOT NULL,
CONSTRAINT [PK_SourceColumns] PRIMARY KEY CLUSTERED
(
[ColumnKey] ASC
)WITH (PAD_INDEX = OFF, STATISTICS_NORECOMPUTE = OFF, IGNORE_DUP_KEY = OFF, ALLOW_ROW_LOCKS = ON, ALLOW_PAGE_LOCKS = ON) ON [PRIMARY]
) ON [PRIMARY]
GO
This is the control flow for the SSIS package:
The Source_AdoDotNet connection manager's ConnectionString property is set to the following expression:
SQL_GetSourceList's SQLStatement property is SELECT ServerName, DatabaseName FROM MultiDbDemo.SourceConnections, and the ResultSet is mapped to the User::SourceList variable.
The ForEach Loop task is configured thusly:
Note that the ADO object source variable is set to the User::SourceList variable populated in the SQL_GetSourceList task.
And the data flow looks like this:
ADO_SRC_SourceInfo is configured thusly:
The next effect of all this is that, for each database listed in the SourceConnections table, we execute the query SELECT LEFT(TABLE_SCHEMA, 50) AS SchemaName, LEFT(TABLE_NAME, 50) AS TableName, LEFT(COLUMN_NAME, 50) AS ColumnName FROM INFORMATION_SCHEMA.COLUMNS and save the results in the SourceColumns table.

Answer 2

You will still need 70 destination components. Simply specify the same table in all of them.