INCREMENT BY

INCREMENT BY 1

Specify the interval between sequence numbers. This integer value can be any positive or negative integer,
but it cannot be 0. This value can have 28 or fewer digits. The absolute of this value must be less than the
difference of MAXVALUE and MINVALUE. If this value is negative, then the sequence descends.
If the increment is positive, then the sequence ascends. If you omit this clause, the interval defaults to 1.

START WITH

START WITH 1000

Specify the first sequence number to be generated. Use this clause to start an ascending sequence at a value greater than
its minimum or to start a descending sequence at a value less than its maximum. For ascending sequences, the default value
is the minimum value of the sequence. For descending sequences, the default value is the maximum value of the sequence.
This integer value can have 28 or fewer digits.

MAXVALUE

MAXVALUE 99999999

Specify the maximum value the sequence can generate. This integer value can have 28 or fewer digits.
MAXVALUE must be equal to or greater than START WITH and must be greater than MINVALUE.

NOMAXVALUE

NOMAXVALUE

Specify NOMAXVALUE to indicate a maximum value of 1 with 27 zeros for an ascending sequence or
1 for a descending sequence. This is the default.

MINVALUE

MINVALUE=1

Specify the minimum value of the sequence. This integer value can have 28 or fewer digits. MINVALUE must be less
than or equal to START WITH and must be less than MAXVALUE.

NOMINVALUE

NOMINVALUE

Specify NOMINVALUE to indicate a minimum value of 1 for an ascending sequence or 1026 for a descending sequence.
This is the default.

CYCLE

CYCLE

Specify CYCLE to indicate that the sequence continues to generate values after reaching either its maximum or minimum value. After an ascending sequence reaches its maximum value, it generates its minimum value. After a descending sequence reaches its minimum, it generates its maximum.

NOCYCLE

NOCYCLE

Specify NOCYCLE to indicate that the sequence cannot generate more values after reaching its maximum or minimum value.
This is the default.

CACHE

CACHE 10

Specify how many values of the sequence Oracle preallocates and keeps in memory for faster access.
This integer value can have 28 or fewer digits. The minimum value for this parameter is 2. For sequences that cycle,
this value must be less than the number of values in the cycle. You cannot cache more values than will fit in a given
cycle of sequence numbers.
If a system failure occurs, all cached sequence values that have not been used in committed DML statements are lost.
The potential number of lost values is equal to the value of the CACHE parameter.

NOCACHE

NOCACHE

Specify NOCACHE to indicate that values of the sequence are not preallocated.
If you omit both CACHE and NOCACHE, Oracle caches 20 sequence numbers by default.

ORDER

ORDER

Specify ORDER to guarantee that sequence numbers are generated in order of request. You may want to use this clause if you are using the sequence numbers as timestamps. Guaranteeing order is usually not important for sequences used to generate primary keys.
ORDER is necessary only to guarantee ordered generation if you are using Oracle with Real Application Clusters. If you are using exclusive mode, sequence numbers are always generated in order.

NOORDER

NOORDER

Specify NOORDER if you do not want to guarantee sequence numbers are generated in order of request. This is the default.
