Sorting and grouping a dataset are just two of several operations that you can apply to the set of rows as a whole, rather than to single rows. The following table gives you an overview of the main PDI steps that fall into this particular group of steps:
|
Step |
Purpose |
|
Group by |
Builds aggregates as Sum, Maximum, and so on, on groups of rows. |
|
Memory Group by |
Same as Group by, but doesn't require sorted input. |
|
Analytic Query |
Computes lead, lag, first, and last fields over a sorted dataset. |
|
Univariate Statistics |
Computes some simple statistics. It complements the Group by step. It is much simpler to configure, but has less capabilities than that step. |
|
Split ... |
