Question

我必须从Old_Table中将数据插入New_Table中旧表中有大约10k的记录我的Old_Table数据如下所示

ID          Structure
001         APC , AMC , Self Service, Change of Billing Address, EPC, 
002         APC , Self Service, EPC, OBA, 
003         EPC, 
004         AMC
005         Self Service

New_Table应该如下所示

        ID          Structure
        001         APC
        001         AMC
        001         Self Service
        001         Change of Billing Address
        001         EPC
        001         (empty/space)
        002         APC
        002         Self Service
        002         EPC
        002         OBA
        002         (empty/space)
        003         EPC
        003         (empty/space)
        004         AMC
        005         Self Service

解决问题和迁移数据的最简单方法是什么感谢

Answer 1

尝试使用以下sql来拆分值。表ALL_TABLES仅用作驱动程序。您可以使用每个表，其中包含逗号之间具有单个值的行数。

insert into a values (1, 'A,B,C')
/
insert into a values (2, 'E,F')
/
insert into a values (3, 'ASD,BSF,BERT,BROT')
/
select * from a
/
select id, s, v, b, substr(s, v+1, b-v-1)
from (
select id, s, instr(s, ',', 1, n) v, instr(s, ',', 1, n+1) b
from (
select a.id id, ','||a.s||',' s, c.n
from a a, (select rownum n from all_tables) c
))
where v > 0 and b > 0
/

这是一个链接到sql小提琴来玩http://www.sqlfiddle.com/#!4/f6ab9/2/4

Answer 2

我找到了问题的答案。以下查询对我有用。

insert into New_Table (ID, Structure)
(select ID, trim(Structure) 
from (
WITH TT AS
 (SELECT ID, Structure FROM Old_Table)
 SELECT ID, substr(str,
                   instr(str, ',', 1, LEVEL) + 1,
                   instr(str, ',', 1, LEVEL + 1) -
                   instr(str, ',', 1, LEVEL) - 1) Structure
     FROM   (SELECT ID, rownum AS r,
                    ','|| Structure||',' AS STR
               FROM   TT )
     CONNECT BY PRIOR r = r
         AND    instr(str, ',', 1, LEVEL + 1) > 0
         AND    PRIOR dbms_random.STRING('p', 10) IS NOT NULL)
         where trim(Structure) is not null);

如何通过从列值中删除逗号将数据从旧表迁移到oracle中的新表

2 个答案: