1. Database Programming
Sections 11-12–Sequences, Indexes & Synonyms, Controlling User Access, Creating & Revoking Object Privileges
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3. Database objects include:
Tables
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Sequence – a shareable object used to automatically generate unique numbers
Can be used for primary keys
Can set increment interval
Increment by (specifies interval between sequence numbers, need to be integer dft = 1)
Start with (initial number of sequence, dft = 1)
MAXVALUE (max. value of sequence)
NOMAXVALUE (max of 10^27 for ascending & -1 fir descending)
MinValue (min. sequence value)
NoMinValue (min value of 1 for ascending, and –(10^27) for descending (default))
Cycle|NoCycle (specifies whether the sequence continues to generate values after reaching its max or min values (Dft = NoCycle))
Cahce n |NoCache (# of values Oracle server pre-allocates and keep in memory. Dft = 20 values. If system crashes, the values are lost)
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6. NEXTVAL – must qualify with sequence name. Sequence.NEXTVAL
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