Oracle Database 分割定界字符串
示例
样本数据：
CREATE TABLE table_name ( value VARCHAR2(50) ); INSERT INTO table_name ( value ) VALUES ( 'A,B,C,D,E' );
查询：
WITH items ( list, item, lvl ) AS (
SELECT value,
REGEXP_SUBSTR( value, '[^,]+', 1, 1 ),
1
FROM table_name
UNION ALL
SELECT value,
REGEXP_SUBSTR( value, '[^,]+', 1, lvl + 1 ),
lvl + 1
FROM items
WHERE lvl < REGEXP_COUNT( value, '[^,]+' )
)
SELECT * FROM items;输出：
LIST ITEM LVL --------- ---- --- A,B,C,D,E A 1 A,B,C,D,E B 2 A,B,C,D,E C 3 A,B,C,D,E D 4 A,B,C,D,E E 5