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在 Oracle 中编写的树级代码分享


  create table Dept(
   DepartNO varchar2(10),
    DepartName varchar2(20),
   TopNo  varchar2(10));
  
  insert into Dept values('001','懂事会','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');
  
  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*/
  );
  
  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;
  
  select departno,departname,level ||'\'|| topno
  from dept
  start with topno='0'
  connect by prior departno=topno;
  
  select lpad(departno,level*2+length(departno),' ')
  from dept
  start with topno='0'
  connect by prior departno=topno;
  
  select lpad(departno,level*3,' ')
  from dept
  start with topno='0'
  connect by prior departno=topno;
  
  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************************************************************
  
  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;
  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);
        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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