教你在oracle中编写树级代码

create table Dept(
 DepartNO  varchar2(10),
   DepartName  varchar2(20),
 TopNo    varchar2(10));

insert into Dept values("001","董事会","0");
insert into Dept values("002","总裁办","001");
insert into Dept values("003","财务部","001");
insert into Dept values("004","市场部","002");
insert into Dept values("005","公关部","002");
insert into Dept values("006","销售部","002");
insert into Dept values("007","分销处","006");
insert into Dept values("008","业务拓展处","004");
insert into Dept values("009","销售科","007");

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CREATE TABLE TempDept
(
 TempdeptNo    char(4), /*部门编号*/
 TempdeptName   varchar2(20), /*部门名称*/
  UpperTempdeptNo  char(4), /*上级部门编号*/
  UpperTempdeptName  varchar2(20), /*上级部门名称*/
 TempdeptLevel   number(4) /*部门所处的级别*/
); 数据挖掘研究院

select departname
from dept
connect by prior departno=topno
start with topno="0";

select a.departname top ,b.departname next
from dept a,dept b
where a.departno=b.topno;

select lpad(departno,level*2+length(departno),"")
from dept
start with topno="0"
connect by prior departno=topno; 数据挖掘研究院

select departno,departname,level ||""|| topno
from dept
start with topno="0"
connect by prior departno=topno; 数据挖掘研究院

select lpad(departno,level*2+length(departno)," ")
from dept
start with topno="0"
connect by prior departno=topno;

select lpad(departno,level*3," ") 数据挖掘研究院

from dept
start with topno="0"
connect by prior departno=topno; 数据挖掘研究院

create or replace function GetLevel(TempNo varchar2)
return varchar2
IS
 Result  varchar2(20);
 cursor CurLevel(curTempNo varchar2)
 is
 select departNo
 from dept
 connect by prior departNo = TopNo
 start with TopNo = curTempNo;
begin
 open CurLevel;
 for v_sor in CurLevel(TempNo) loop
   Result:=Result || "/" || v_sor.curTempNo;
 end loop;
 return(Result);
 close CurLevel;
  dbms_output.put_line("success");
end GetLevel;

REM************************************************************
REM**********   生成部门之间形成的树结构     ******************
REM********** 功能:输入部门后自动产生该部门  ******************
REM**********      及其子部门之间的树关系()  ******************
REM********** 输入参数：部门编号ParaDeptId   ******************
REM************************************************************ 数据挖掘研究院

CREATE OR REPLACE procedure getAllSubDeptId(ParaDeptId varchar2)
IS
    DeptNo1       varchar2(4);     /*存放部门编号*/
    UpperDeptNo1  varchar2(4);     /*存放该部门的上级部门编号*/
    UpperDeptNo2  varchar2(4);     /*存放查询同级上级部门编号*/
    UpperDeptNo3  varchar2(4);     /*存放查询的上级部门编号*/
       level         number;          /*部门所处级别*/
    DSql          varchar2(100);   /*动态SQL字符串*/
    CURSOR getDept IS
       select DepartNO,TopNo
       from dept
       where DepartNo != ParaDeptId; 数据挖掘研究院
BEGIN
 --DSql :="create table tempdept(TempdeptNo,TempdeptName,UpperTempdeptNo,
  --UpperTempdeptName,TempdeptLevel)";
 --EXECUTE IMMEDIATE DSql;

   DSql :="TRUNCATE TABLE TempDept";
   dbms_output.put_line(0);
   EXECUTE IMMEDIATE DSql;
   dbms_output.put_line(1);
   insert into TempDept values(ParaDeptId,Null,Null,Null,0);
   dbms_output.put_line(2);
   open getDept;
   fetch getDept into DeptNo1,UpperDeptNo1;
   WHILE ( SQLCODE = 0 )
   LOOP
      level := 1 ;
      UpperDeptNo3 := UpperDeptNo1;
      WHILE ( UpperDeptNo1 is NOT NULL )
      loop
         if (UpperDeptNo1 = ParaDeptId) then
            insert into tempdept           values(DeptNo1,NULL,UpperDeptNo3,NULL,level); 数据挖掘研究院
           exit;
        else
           UpperDeptNo2 := UpperDeptNo1;
           select topNo into UpperDeptNo1
           from  dept
           where Departno= UpperDeptNo2;
           if UpperDeptNo2 != UpperDeptNo1
    then
                level := level+1;
           end if;
         end if;
      END LOOP;
     fetch getDept into DeptNo1,UpperDeptNo1;
   END LOOP;
   close getDept;
END;

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数据挖掘研究院