5 Sets and Multi-assign Data

EQL supports sets, in particular the use of sets to represent multi-assign attributes.

• About sets
  EQL represents multi-assign attributes from collections as sets.
• Aggregate functions
  EQL provides three aggregators for working with sets.
• Row functions
  EQL provides a number of row functions for working with sets.
• Set constructor
  EQL allows users to write sets directly in queries.
• Quantifiers
  EQL provides existential and universal quantifiers for use with Boolean expressions against sets.
• Grouping by sets
  EQL provides support for grouping by sets.