How to Split a VARCHAR Column into Multiple Values in SQL Using Delimiters?

Splitting VARCHAR Columns into Multiple Values in SQL

Your goal is to split a VARCHAR column, AD_Ref_List.Value, into multiple values based on the values stored in another table, specifically xx_insert.XX_DocAction_Next. However, you encountered an issue where Oracle interpreted the values in the delimited list as a single string, causing your query to return no rows.

To resolve this problem, you can modify your query to include delimiters around the values in the IN clause, ensuring that Oracle recognizes them as individual values for comparison. Additionally, you can use a LIKE operator to check if the value in AD_Ref_List.Value is a substring of the delimited list (also with delimiters wrapped around it).

Here's a revised query that incorporates these changes:

SELECT r.Value
FROM AD_Ref_List r
INNER JOIN xx_insert x
ON ( ',' || x.XX_DocAction_Next || ',' LIKE '%,' || r.value || ',%' )
WHERE r.AD_Reference_ID = 1000448
AND x.xx_insert_id = 1000283;

By wrapping the values in delimiters, this query will effectively split the VARCHAR column into multiple values, allowing you to filter the results based on the values in the other table.

Note that while this query may provide the desired functionality, it may not be the most efficient approach. If possible, it is generally recommended to avoid manipulating delimited lists in SQL as it can introduce complexity and performance issues. Instead, consider using a more appropriate data structure, such as an array or JSON object, to store and manipulate your data.

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