拆分成行和列 Oracle

Question

我正在创建一个 returns 一个基于链拆分的 table 类型对象的函数，查询如下：

WITH COLUMNA AS (
    SELECT ROWNUM COL_ID, REGEXP_SUBSTR ('A,B,C:D,E,F:','[^:]+',1,LEVEL) COL FROM DUAL
    CONNECT BY REGEXP_SUBSTR ('A,B,C:D,E,F:','[^:]+',1,LEVEL) IS NOT NULL
    ORDER BY COL_ID
)
SELECT * FROM (SELECT COL_ID, ROWNUM FIL_ID, SUBSTR(COL, INSTR(COL, ',', 1, LVL) + 1, INSTR(COL, ',', 1, LVL + 1) - INSTR(COL, ',', 1, LVL) - 1) NAME 
FROM
( SELECT ',' || COL || ',' AS COL, COL_ID FROM COLUMNA ),
( SELECT LEVEL AS LVL FROM DUAL CONNECT BY LEVEL <= 100 )
WHERE LVL <= LENGTH(COL) - LENGTH(REPLACE(COL, ',')) - 1
ORDER BY COL_ID, NAME
) FILA

结果如下：

COL_ID FIL_ID NAME
1       1       A
1       2       B
1       3       C
2       4       D
2       5       E
2       6       F

我需要得到以下结果

COL_ID VAL1    VAL2   VAL3   VALN
1       A       B      C      X
2       D       E      F      Y

希望得到您宝贵的帮助！！！

Answer 1

您的对象中需要有固定数量的列：

CREATE TYPE values_obj AS OBJECT(
  COL_id INTEGER,
  VAL1   VARCHAR2(10),
  VAL2   VARCHAR2(10),
  VAL3   VARCHAR2(10),
  VAL4   VARCHAR2(10),
  VAL5   VARCHAR2(10)
)
/

CREATE TYPE values_tab AS TABLE OF values_obj
/

CREATE OR REPLACE FUNCTION split_values(
  in_list VARCHAR2
) RETURN values_tab
IS
  vals VALUES_TAB;
BEGIN
  SELECT values_obj(
           LEVEL,
           REGEXP_SUBSTR( in_list, '([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*).*?(:|$)', 1, LEVEL, NULL, 1 ),
           REGEXP_SUBSTR( in_list, '([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*).*?(:|$)', 1, LEVEL, NULL, 2 ),
           REGEXP_SUBSTR( in_list, '([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*).*?(:|$)', 1, LEVEL, NULL, 3 ),
           REGEXP_SUBSTR( in_list, '([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*).*?(:|$)', 1, LEVEL, NULL, 4 ),
           REGEXP_SUBSTR( in_list, '([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*).*?(:|$)', 1, LEVEL, NULL, 5 )
         )
  BULK COLLECT INTO vals
  FROM   DUAL
  CONNECT BY LEVEL < REGEXP_COUNT( in_list, '([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*),?([^:,]*).*?(:|$)' );

  RETURN vals;
END;
/

那么你可以这样做：

SELECT *
FROM   TABLE( split_values( 'A,B,C:D,E,F,G:H,I,J,K,L,M::N' ) );

输出：

COL_ID  VAL1    VAL2    VAL3    VAL4    VAL5
------  ----    ----    ----    ----    ----
     1     A       B       C       -       - 
     2     D       E       F       G       - 
     3     H       I       J       K       L
     4     -       -       -       -       - 
     5     N       -       -       -       -

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