我正在创建一个函数,它根据链的分割返回一个表类型对象,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
我需要获得以下结果
COL_ID VAL1 VAL2 VAL3 VALN
1 A B C X
2 D E F Y
我希望你的宝贵帮助!!!
答案 0 :(得分:0)
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;
/
然后你可以这样做:
SELECT *
FROM TABLE( split_values( 'A,B,C:D,E,F,G:H,I,J,K,L,M::N' ) );
哪个输出:
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 - - - -