Key Generation Examples
Figure 1. Data Description Specifications for a Physical
File
....+....1....+....2....+....3....+....4....+....5....+....6....+....7....+....8
A PHYSICAL FILE PF1 FOR KEY GENERATION EXAMPLES
A
A R PFRECORD
A
A MTH 2
A DAY 2
A YEAR 4
A ITEM 5
A
A
A K MTH
A K DAY
The physical file described by Figure 1 forms a basis for the examples that follow. Each example refers to a logical file (derived from the physical file) that specifies EXTERNALLY-DESCRIBED-KEY in its SELECT clause.
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