this table are in the data dictionary):ALL_SEQUENCES ALL_SEQUENCES describes all sequences accessible to the user. Related views: DBA_SEQUENCES describes all sequences in the database. USER_SEQUENCES describes all sequences owned by the current user. This view does not display the SEQUENCE_OWNER column. Column Datatype NULL Description SEQUENCE_OWNER VARCHAR2(30) NOT NULL Name of the owner of the sequence
SEQUENCE_NAME VARCHAR2(30) NOT NULL Sequence name
MIN_VALUE NUMBER
Minimum value of the sequence
MAX_VALUE NUMBER
Maximum value of the sequence
INCREMENT_BY NUMBER NOT NULL Value by which sequence is incremented
CYCLE_FLAG VARCHAR2(1)
Does sequence wrap around on reaching limit
ORDER_FLAG VARCHAR2(1)
Are sequence numbers generated in order
CACHE_SIZE NUMBER NOT NULL Number of sequence numbers to cache
LAST_NUMBER NUMBER NOT NULL Last sequence number written to disk. If a sequence uses caching, the number written to disk is the last number placed in the sequence cache. This number is likely to be greater than the last sequence number that was used
你可以建一个标tab,用这个语句:insert into tab(a) values(aaa.nextval);可以看到seq的值。
ALL_SEQUENCES describes all sequences accessible to the user. Related views:
DBA_SEQUENCES describes all sequences in the database. USER_SEQUENCES describes all sequences owned by the current user. This view does not display the SEQUENCE_OWNER column. Column Datatype NULL Description
SEQUENCE_OWNER
VARCHAR2(30)
NOT NULL
Name of the owner of the sequence
SEQUENCE_NAME
VARCHAR2(30)
NOT NULL
Sequence name
MIN_VALUE
NUMBER
Minimum value of the sequence
MAX_VALUE
NUMBER
Maximum value of the sequence
INCREMENT_BY
NUMBER
NOT NULL
Value by which sequence is incremented
CYCLE_FLAG
VARCHAR2(1)
Does sequence wrap around on reaching limit
ORDER_FLAG
VARCHAR2(1)
Are sequence numbers generated in order
CACHE_SIZE
NUMBER
NOT NULL
Number of sequence numbers to cache
LAST_NUMBER
NUMBER
NOT NULL
Last sequence number written to disk. If a sequence uses caching, the number written to disk is the last number placed in the sequence cache. This number is likely to be greater than the last sequence number that was used