How to get distinct values from nested table in oracle?

@lizzie 

To get distinct values from a nested table in Oracle, you can use the TABLE operator to convert the nested table into a result set and then apply the DISTINCT keyword to get unique values. Here is an example:

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SELECT DISTINCT column_value 
FROM TABLE(nested_table_column);

Replace column_value with the column name of the nested table and nested_table_column with the name of the nested table column in your query.

This query will return distinct values from the nested table column.