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create
 
table
 S_Depart  (
   DepartId             
INT
                             
not
 
null
,
   DepartName           NVARCHAR2(
40
)                   
not
 
null
,
   DepartOrder          
INT
                            
default
 
0
,
   
constraint
 PK_S_DEPART 
primary
 
key
 (DepartId)
);
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CREATE SEQUENCE emp_sequence
INCREMENT BY 1 -- ÿ´Î¼Ó¼¸¸ö
START WITH 1 -- ´Ó1¿ªÊ¼¼ÆÊý
NOMAXvalue -- ²»ÉèÖÃ×î´óÖµ
NOCYCLE -- Ò»Ö±ÀÛ¼Ó£¬²»Ñ­»·
CACHE 10; --ÉèÖûº´æcache¸öÐòÁУ¬Èç¹ûϵͳdownµôÁË»òÕßÆäËüÇé¿ö½«»áµ¼ÖÂÐòÁв»Á¬Ðø£¬Ò²¿ÉÒÔÉèÖÃΪ---------NOCACHE
Õë¶ÔS_Depart´´½¨µÄsequenceÈçÏ£º
create
 sequence S_S_DEPART
minvalue 
1
maxvalue 
999999999999999999999999999
start 
with
 1
increment 
by
 
1
nocache;
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CURRVAL=·µ»Ø sequenceµÄµ±Ç°Öµ
NEXTVAL=Ôö¼ÓsequenceµÄÖµ£¬È»ºó·µ»Ø sequence Öµ
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emp_sequence.CURRVAL
emp_sequence.NEXTVAL
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