如何从oracle sql中的内部查询输出中删除单引号

Question

我想从内部查询的输出中删除单引号：

select *from demo where codes in (select codes from demo_temp);

第 2 列的数据类型是 varchar2

select codes from demo_temp 的输出是 '201,601'

我希望输出为

select *from demo where codes in (201,601);---15rows

我在下面尝试过，但它不起作用：

select *from demo where codes in replace((select codes from demo_temp),'''','');--0rows

select *from demo where codes in (select replace(codes,'''','') from demo_temp);--0rows

Answer 1

一种选择是将codes 拆分成行（在子查询中）：

SELECT *
  FROM demo
 WHERE codes IN (    SELECT REGEXP_SUBSTR (TRIM (BOTH '''' FROM codes),
                                           '[^,]+',
                                           1,
                                           LEVEL)
                       FROM demo_temp
                 CONNECT BY LEVEL <= REGEXP_COUNT (codes, ',') + 1);

---

它会起作用吗？我猜是这样，如果demo.codes 包含诸如201 和601 之类的值。

例如：demo_temp.codes = '201,601'。拆分成行，查询返回201 和601（不带单引号）：

SQL> WITH demo_temp AS (SELECT q'['201,601']' codes FROM DUAL)
  2      SELECT codes,
  3             REGEXP_SUBSTR (TRIM (BOTH '''' FROM codes),
  4                            '[^,]+',
  5                            1,
  6                            LEVEL)
  7        FROM demo_temp
  8  CONNECT BY LEVEL <= REGEXP_COUNT (codes, ',') + 1
  9  /

CODES     REGEXP_SU
--------- ---------
'201,601' 201
'201,601' 601

SQL>

Answer 2

由于题主需要动态对比，我们先做一个简单的测试。这个想法是显示不带引号的原始列以及与逗号字符串中的任何值匹配的连接中的值

SQL> create table t ( id number generated always as identity start with 1 increment by 1 , codes number ) ;

Table created.

SQL> insert into t ( codes ) values ( 201 ) ;

1 row created.

SQL> insert into t ( codes ) values ( 601 ) ;

1 row created.

SQL> insert into t ( codes ) values ( 309 ) ;

1 row created.

SQL> insert into t ( codes ) values ( 501 )  ;

1 row created.

SQL> commit ;

Commit complete.

SQL> select * from t ;

        ID      CODES
---------- ----------
         1        201
         2        601
         3        309
         4        501

SQL> create table x ( codes varchar2(20) ) ;

Table created.

SQL> insert into x values ( q'('201,601')' ) ;

1 row created.

SQL> insert into x values ( q'('309,501')') ;

1 row created.

SQL> commit ;

Commit complete.

SQL> select * from x ;

CODES
--------------------
'201,601'
'309,501'

SQL> with z ( lvl , codes )
    as
    ( select level lvl, regexp_substr ( codes, '[^,]+', 1, LEVEL) as codes
  from ( select replace(codes,'''','') as codes from x )
  connect by level <= regexp_count (codes, ',') + 1
  )
  select t.id , t.codes from t
  where t.codes in ( select z.codes from z );

        ID      CODES
---------- ----------
         1        201
         2        601
         4        501
         3        309

同一行中的原始列不带引号

SQL> with z ( lvl , codes )
as
( select level lvl, regexp_substr ( codes, '[^,]+', 1, LEVEL) as codes
  from ( select replace(codes,'''','') as codes from x )
  connect by level <= regexp_count (codes, ',') + 1
)
select t.id , t.codes , replace(x.codes,'''','') as org_val 
from t cross join x 
where t.codes in ( select z.codes from z )
and
( t.codes like '%' || regexp_substr(replace(x.codes,'''',''),'[^,]+',1,1) || '%' 
  or 
  t.codes like '%' || regexp_substr(replace(x.codes,'''',''),'[^,]+',1,2) || '%'
);


       ID      CODES ORG_VAL
---------- ---------- --------------------
         1        201 201,601
         2        601 201,601
         4        501 309,501
         3        309 309,501