标签：opener line 空值 process nta oop ali start path
oracle 同一张表 数据是树形结构
fid(主键) parentid(父ID) fpath(节点全路径)
1 1
2 1 1/2
3 1 1/3
4 2 1/2/4
但是现有数据是用excel导入的 fpath 是空值，现在想写条语句把 fpath全都加上，求语句
建表及数百据
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create table test(fid int,parentid int,fpath varchar2(100));insert into test values (1,null,null);insert into test values (2,1,null);insert into test values (3,1,null);insert into test values (4,2,null); |
执行更度新版语句
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update test a set a.fpath=(select b.fpath from(select fid,parentid, substr(sys_connect_by_path(fid,‘/‘),2) fpathfrom test start with fid=1 connect by prior fid=parentid) bwhere a.fid=b.fid); |
效果截图权
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CREATE TABLE temp ( fid int, parentid int, fpath varchar(20));insert into temp (fid, parentid) values(1, null);insert into temp (fid, parentid) values(2, 1);insert into temp (fid, parentid) values(3, 1);insert into temp (fid, parentid) values(4, 2);update tempset fpath = ( SELECT fpath from ( START WITH tt.parentid is null CONNECT BY PRIOR tt.fid = tt.parentid ) t where t.fid = temp.fid ); 已更新e68a84e8a2ad7a64313333326432354行。SQL> select * from temp; FID PARENTID FPATH---------- ---------- ---------------------------------------- 1 1 2 1 1/2 3 1 1/3 4 2 1/2/4 |
标签：opener line 空值 process nta oop ali start path
原文地址：https://www.cnblogs.com/xtjatswc/p/12865624.html
