Sets and Subsets

Key Entries
Bit Vector
Index Random Sets and Subsets
Index Sequential Sets and Subsets
Logically Sectioned Index Sequential Set
Physically Sectioned Index Sequential Sets
Ordered List Sets and Subsets
Unordered List Sets and Subsets

The following general restrictions apply to sets and subsets:

  • A FIND AT operation is not allowed for unkeyed structures (bit vector and unordered list).

  • Bit vectors can be used only for disjoint fixed-format standard data sets and cannot themselves be embedded.

  • The DUPLICATES FIRST or LAST options can be specified only for index sequential, ordered list, and index random data sets.

Prev  Up  Next
Unordered Data Sets  Home  Key Entries