Table of Contents

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  1. Preface
  2. Transformations
  3. Source transformation
  4. Target transformation
  5. Access Policy transformation
  6. B2B transformation
  7. Aggregator transformation
  8. Cleanse transformation
  9. Data Masking transformation
  10. Data Services transformation
  11. Deduplicate transformation
  12. Expression transformation
  13. Filter transformation
  14. Hierarchy Builder transformation
  15. Hierarchy Parser transformation
  16. Hierarchy Processor transformation
  17. Input transformation
  18. Java transformation
  19. Java transformation API reference
  20. Joiner transformation
  21. Labeler transformation
  22. Lookup transformation
  23. Machine Learning transformation
  24. Mapplet transformation
  25. Normalizer transformation
  26. Output transformation
  27. Parse transformation
  28. Python transformation
  29. Rank transformation
  30. Router transformation
  31. Rule Specification transformation
  32. Sequence Generator transformation
  33. Sorter transformation
  34. SQL transformation
  35. Structure Parser transformation
  36. Transaction Control transformation
  37. Union transformation
  38. Velocity transformation
  39. Verifier transformation
  40. Web Services transformation

Transformations

Transformations

Nested aggregate functions

Nested aggregate functions

A nested aggregate function is an aggregate function within another aggregate function.
For example, the following expression sums sales and returns the highest number:
MAX( SUM( SALES ))
You can include multiple single-level or multiple nested functions in different output fields in an Aggregator transformation. You cannot include both single-level and nested functions in an Aggregator transformation.
You cannot nest aggregate functions in advanced mode.
When an Aggregator transformation contains a single-level function in any output field, you cannot use a nested function in any other field in that transformation. If you need to create both single-level and nested functions, create separate Aggregator transformations.

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