2. Data blending is
bringing together two or
more different data
sources or data streams.
There are two main
ways to combine data:
horizontally
vertically
&
3. The Union tool merges data
vertically, stacking datasets
that share common columns
on top of each other.
We're going to start with
the Union tool.
4. An example union:
2011 Customer File
2012 Customer File
These datasets have the same two fields, [ID] and [Name].
The resulting dataset lines up the shared fields and stacks the records.
2011 Customer File
2012 Customer File