创建序列： create sequence ccxx_ver_seq start with 1 increment by 1; 创建触发器： create or replace trigger ccxx_ver_tri
创建序列：
create sequence ccxx_ver_seq start with 1 increment by 1;
创建触发器：
create or replace trigger ccxx_ver_trig
before insert on ccxx
for each row begin
select ccxx_ver_seq.nextval into :new.version from dual;
end;
ccxx为触发器应用的表名
version为需要进行值自增长的字段名称
测试：
insert into ccxx(ID,XM,SFZH,XS_SZMD_ID) values('aa','aa','aa','aa');
commit;
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