ORACLE行转列经典语法

是否可以将多行变成一行
如：
A 1
B 2
C 3
效果为：A 1 B 2 C 3   不是用wm_concat 连接  而是形成6个独立字段

 

WITH x AS
(SELECT 'A' CODE_id,'1' code_value FROM dual
UNION
SELECT 'B' CODE_id,'2' code_value FROM dual
UNION
SELECT 'C' CODE_id,'3' code_value FROM dual
)
SELECT MAX(CASE WHEN RN=1 THEN CN END) CN1,
MAX(CASE WHEN RN=2 THEN CN END) CN2,
MAX(CASE WHEN RN=3 THEN CN END) CN3,
MAX(CASE WHEN RN=4 THEN CN END) CN4,
MAX(CASE WHEN RN=5 THEN CN END) CN5,
MAX(CASE WHEN RN=6 THEN CN END) CN6 FROM (
SELECT regexp_substr(a.name, '[^,]+', 1, LEVEL) AS CN,ROWNUM RN FROM (
SELECT wmsys.wm_concat(code_id||','||code_value) NAME from x
) A
CONNECT BY LEVEL <= (length(A.name) - length(REPLACE(A.name, ',', '')) + 1));