oracle中设置主键

1.创建表

1.创建表
create table "c_user"(
  "id" number primary key,
  "username" varchar(255),
  "password" varchar(255),
  "p_name" varchar(255),
  "p_number" varchar(255),
  "p_date" varchar(255),
  "p_referenceNumber" varchar(255),
  "tech_area" varchar(255),
  "platformLevel" varchar(255),
  "address" varchar(255),
  "permission" int(10),
  "type1" varchar(255),
  "union1"  int(10),
  "BTHconStruction" int(10),
  "service1" varchar(255),
  "service2" varchar(255),
  "service3" varchar(255),
  "course1" varchar(255),
  "course2" varchar(255),
  "course3" varchar(255),
  "relyName" varchar(255),
  "credit" varchar(255),
  "relylegalName" varchar(255),
  "phone" varchar(255),
  "unitType" varchar(255),
  "constructionUnit" varchar(255),
  "directorName" varchar(255),
  "directorSex" varchar(255),
  "directorBirthyear" varchar(255),
  "directorTitle" varchar(255),
  "directorProfessional" varchar(255),
  "directorEducation" varchar(255),
  "directorDegree" varchar(255),
  "directorTele" varchar(255),
  "directorPhone" varchar(255),
  "directorEmail" varchar(255),
  "webName" varchar(255),
  "webSite" varchar(255),
  "addrplatformAddressess" varchar(255),
  "email" varchar(255),
  "state" int(2),
  "u_type" int(6),
  "p_type" int(2)

);

创建表

#查看约束

select * from user_constraints;

查看约束

  ////设置主键自增////

2.创建序列

create sequence c_user_id_seq start with 1 increment by 1;

创建序列

#查看序列

 select * from user_sequences;

查看序列

　　　　3.设置触发器  //若表名为小写时，操作时应加“”号查找，列字段相同，在NAvicat中需要，eclipse可以不用。

create or replace trigger c_user_trigger
before insert on "c_user"
for each row
when(new."id" is null)
begin
select c_user_id_seq.nextval into:new."id" from dual;
end;

设置触发器

　　　　　#查看触发器
　　　　　　

　select * from user_triggers;

查看触发器

　　　　　#测试

commit;//命令行操作需要
                        select * from "c_user";