4

我开始使用 SQL，并且遇到了分层查询。同时我成功地用命令选择了行connect by prior但未能更新。这是我的更新查询：

update HTABLE set status = 'INACTIVE'
  WHERE STATUS <> 'CLOSE'
  Connect by prior PARENT_ID=ID start with PARENT_ID=12345;

我得到了SQL Error: ORA-00933: SQL command not properly ended。如何分层更新表？

编辑

我也尝试将where条件放在 中start with，但它没有帮助：

update HTABLE set status = 'INACTIVE'
  Connect by prior PARENT_ID=ID start with PARENT_ID=12345 AND STATUS <> 'CLOSE';
4

2 回答 2

5

分层查询仅适用于 SELECT。它不适用于 UPDATE （我同意它可能会很整洁）。

所以你可以做的是：

update HTABLE 
set status = 'INACTIVE'
WHERE STATUS <> 'CLOSE'
and id in ( select c.id
            from htable
            connect by prior ID = PARENT_ID 
            start with PARENT_ID = 12345);

注意列的顺序connect by prior ID = PARENT_ID。通常我们想从 START WITH 行沿着树向下走，这就是我所做的。您的命令connect by prior PARENT_ID = ID从 12345 向上传递到它的父母、祖父母等。如果这是您想要的，请将connect by子句切换回来。

于 2017-07-25T09:33:56.900 回答
1

您可以更新 using 子句where id in (select ... connect by...)，也可以使用merge：

merge into htable h
using (select distinct id 
         from htable 
         where status <> 'CLOSE'
         connect by prior parent_id = id 
         start with parent_id = 11) src
on (h.id = src.id)
when matched then update set status = 'INACTIVE'

测试数据：

create table htable (id number(4), parent_id number(4), status varchar2(10));
insert into htable values (   1, null, 'ACTIVE');
insert into htable values (  11,    1, 'CLOSE');
insert into htable values (  12,    1, 'ACTIVE');
insert into htable values ( 111,   11, 'ACTIVE');
insert into htable values ( 112,   11, 'ACTIVE');
insert into htable values ( 121,   12, 'ACTIVE');
insert into htable values (   2, null, 'ACTIVE');
insert into htable values (  21,    2, 'ACTIVE');
insert into htable values ( 211,   21, 'ACTIVE');
insert into htable values ( 212,   21, 'ACTIVE');

之后merge：

   ID PARENT_ID STATUS
----- --------- ----------
    1           INACTIVE
   11         1 INACTIVE
   12         1 ACTIVE
  111        11 INACTIVE
  112        11 INACTIVE
  121        12 ACTIVE
    2           ACTIVE
   21         2 ACTIVE
  211        21 ACTIVE
  212        21 ACTIVE
于 2017-07-25T09:31:04.787 回答