oracle遞迴查詢start with ... connect by 的使用
阿新 • • 發佈:2018-12-11
create table test_wx (id varchar2(30), pid varchar2(30), type varchar2(30) ); insert into test_wx (ID, PID, TYPE) values ('10', '0', 'A'); insert into test_wx (ID, PID, TYPE) values ('1010', '10', 'B'); insert into test_wx (ID, PID, TYPE) values ('1011', '10', 'C'); insert into test_wx (ID, PID, TYPE) values ('101010', '1010', 'D'); insert into test_wx (ID, PID, TYPE) values ('10101010', '101010', 'E'); insert into test_wx (ID, PID, TYPE) values ('1010101010', '10101010', 'F'); insert into test_wx (ID, PID, TYPE) values ('101010101011', '1010101010', 'H');
1.查詢id = ‘101010101011’的所有上級葉子節點資訊
select a.*
from test_wx a
start with a.id = '101010101011'
connect by prior a.pid = a.id;
2.查詢id = ‘101010101011’的上級葉子節點資訊,截止到type='B'
select level, a.* from test_wx a where level <= (select level from test_wx a where a.type = 'B' start with a.id = '101010101011' connect by prior a.pid = a.id) start with a.id = '101010101011' connect by prior a.pid = a.id;