How to return multiple records from single record in oracle?

@aubrey 

To return multiple records from a single record in Oracle, you can use a combination of SQL functions such as UNPIVOT, CROSS JOIN, or the XMLTABLE function.

1. UNPIVOT: You can use the UNPIVOT function to transform columns into rows, effectively returning multiple records from a single record. Here's an example:

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SELECT id, attribute, value
FROM your_table
UNPIVOT (
  value FOR attribute IN (column1 AS 'attribute1', column2 AS 'attribute2', column3 AS 'attribute3')
);

1. CROSS JOIN: Another way to return multiple records from a single record is by using a CROSS JOIN to join the table with a subquery that generates multiple rows. Here's an example:

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SELECT t.id, s.attribute, s.value
FROM your_table t
CROSS JOIN (
  SELECT 'attribute1' as attribute, t.column1 as value FROM dual
  UNION ALL
  SELECT 'attribute2' as attribute, t.column2 as value FROM dual
  UNION ALL
  SELECT 'attribute3' as attribute, t.column3 as value FROM dual
) s;

1. XMLTABLE: You can also use the XMLTABLE function to parse XML data in a single column and return multiple rows. Here's an example:

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SELECT xt.id, x.attribute, x.value
FROM your_table xt,
XMLTABLE('/row' PASSING XMLType(xt.xml_column)
      COLUMNS
        attribute VARCHAR2(50) PATH '@attribute',
        value     VARCHAR2(50) PATH '@value'
) x;

These are just a few examples of how you can return multiple records from a single record in Oracle. The best approach will depend on the structure of your data and the specific requirements of your query.