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Types of access Schema DDL
94 U929-J-Z125-9-76
4.7.3 Determining the order of records within a set occurrence
Two basic concepts in determining the logical order of the member records within a set
occurrence can be distinguished:
– sorting without key values, and
– sorting according to primary key values
They are described in detail below.
Sorting without key values
⎧LAST ⎫
FIRST
ORDER IS ⎨NEXT ⎬
PRIOR
⎩IMMATERIAL⎭