PLSQL分级取数据

分级取数据

select employee_id,last_name,job_id,manager_id from employees

start with employee_id=101 --employee_id=101为父

connect by prior employee_id=manager_id;--现在是由父指向子（从上到底）

EMPLOYEE_ID LAST_NAME       JOB_ID  MANAGER_ID

----------- ------------------------- ---------- ----------

101 Kochhar       AD_VP 100

108 Greenberg       FI_MGR 101

109 Faviet       FI_ACCOUNT 108

110 Chen       FI_ACCOUNT 108

111 Sciarra       FI_ACCOUNT 108

112 Urman       FI_ACCOUNT 108

113 Popp       FI_ACCOUNT 108

200 Whalen       AD_ASST 101

203 Mavris       HR_REP 101

204 Baer       PR_REP 101

205 Higgins       AC_MGR 101

EMPLOYEE_ID LAST_NAME       JOB_ID  MANAGER_ID

----------- ------------------------- ---------- ----------

206 Gietz       AC_ACCOUNT 205

select employee_id,last_name,job_id,manager_id from employees

start with employee_id=101 --employee_id=101为父

connect by prior manager_id=employee_id;--现在是由子指向父（从底向上）

EMPLOYEE_ID LAST_NAME       JOB_ID  MANAGER_ID

----------- ------------------------- ---------- ----------

101 Kochhar       AD_VP 100

100 King       AD_PRES

select employee_id,last_name,job_id,manager_id from employees

start with employee_id=101

connect by prior employee_id=manager_id

and employee_id!=108;

EMPLOYEE_ID LAST_NAME       JOB_ID  MANAGER_ID

----------- ------------------------- ---------- ----------

101 Kochhar       AD_VP 100

200 Whalen       AD_ASST 101

203 Mavris       HR_REP 101

204 Baer       PR_REP 101

205 Higgins       AC_MGR 101

206 Gietz       AC_ACCOUNT 205

select employee_id,last_name,job_id,manager_id from employees

where employee_id!=108

start with employee_id=101

connect by prior employee_id=manager_id;

EMPLOYEE_ID LAST_NAME       JOB_ID  MANAGER_ID

----------- ------------------------- ---------- ----------

101 Kochhar       AD_VP 100

109 Faviet       FI_ACCOUNT 108

110 Chen       FI_ACCOUNT 108

111 Sciarra       FI_ACCOUNT 108

112 Urman       FI_ACCOUNT 108

113 Popp       FI_ACCOUNT 108

200 Whalen       AD_ASST 101

203 Mavris       HR_REP 101

204 Baer       PR_REP 101

205 Higgins       AC_MGR 101

206 Gietz       AC_ACCOUNT 205

用LEVEL和LPAD格式化分级报告

select lpad(last_name,length(last_name)+(LEVEL*2)-2,'$') as org_chart,level

from employees

start with employee_id=100

connect by prior employee_id=manager_id;