MOCKSTACKS
EN
Questions And Answers

More Tutorials









Oracle Splitting Strings using a PL SQL Function

PL/SQL Function:


CREATE OR REPLACE FUNCTION split_String(
 i_str IN VARCHAR2,
 i_delim IN VARCHAR2 DEFAULT ','
) RETURN SYS.ODCIVARCHAR2LIST DETERMINISTIC
AS
 p_result SYS.ODCIVARCHAR2LIST := SYS.ODCIVARCHAR2LIST();
 p_start NUMBER(5) := 1;
 p_end NUMBER(5);
 c_len CONSTANT NUMBER(5) := LENGTH( i_str );
 c_ld CONSTANT NUMBER(5) := LENGTH( i_delim );
BEGIN
 IF c_len > 0 THEN
 p_end := INSTR( i_str, i_delim, p_start );
 WHILE p_end > 0 LOOP
 p_result.EXTEND;
p_result( p_result.COUNT ) := SUBSTR( i_str, p_start, p_end - p_start );
 p_start := p_end + c_ld;
 p_end := INSTR( i_str, i_delim, p_start );
 END LOOP;
 IF p_start <= c_len + 1 THEN
 p_result.EXTEND;
 p_result( p_result.COUNT ) := SUBSTR( i_str, p_start, c_len - p_start + 1 );
 END IF;
 END IF;
 RETURN p_result;
END;
/

Sample Data:


CREATE TABLE table_name ( id, list ) AS
SELECT 1, 'a,b,c,d' FROM DUAL UNION ALL -- Multiple items in the list
SELECT 2, 'e' FROM DUAL UNION ALL -- Single item in the list
SELECT 3, NULL FROM DUAL UNION ALL -- NULL list
SELECT 4, 'f,,g' FROM DUAL; -- NULL item in the list

Query:


SELECT t.id,
 v.column_value AS VALUE,
 ROW_NUMBER() OVER ( PARTITION BY id ORDER BY ROWNUM ) AS lvl
FROM table_name t,
 TABLE( split_String( t.list ) ) (+) v

Output:


 ID ITEM LVL
---------- ------- ----------
1 a 1
1 b 2
1 c 3
1 d 4
2 e 1
3 (NULL) 1
4 f 1
4 (NULL) 2
4 g 3


Conclusion

In this page (written and validated by ) you learned about Oracle Splitting Strings using a PL SQL Function . What's Next? If you are interested in completing Oracle tutorial, your next topic will be learning about: Oracle Collections and Records.



Incorrect info or code snippet? We take very seriously the accuracy of the information provided on our website. We also make sure to test all snippets and examples provided for each section. If you find any incorrect information, please send us an email about the issue: mockstacks@gmail.com.


Share On:


Mockstacks was launched to help beginners learn programming languages; the site is optimized with no Ads as, Ads might slow down the performance. We also don't track any personal information; we also don't collect any kind of data unless the user provided us a corrected information. Almost all examples have been tested. Tutorials, references, and examples are constantly reviewed to avoid errors, but we cannot warrant full correctness of all content. By using Mockstacks.com, you agree to have read and accepted our terms of use, cookies and privacy policy.