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Oracle CARDINALITY function
Oracle/PLSQL function CARDINALITY returns the number of elements in the nested table.
Oracle/PLSQL syntax of the CARDINALITY function
CARDINALITY( nested table column_id )
Parameters or arguments
- nested table column_id – a column of an attached table whose number of elements you want to return.
The CARDINALITY function returns a numeric value.
If the nested table is empty, the CARDINALITY function returns NULL.
If the nested table is an empty collection, the CARDINALITY function returns NULL.
The CARDINALITY function can be used in the following Oracle/PLSQL versions
| Oracle 12c, Oracle 11g, Oracle 10g |
Let us consider an example of the Oracle CARDINALITY function and learn how to use the CARDINALITY function in Oracle PLSQL.
SELECT prod_id,
CARDINALITY(ad_textdocs_ntab) Cardinality
FROM print_media
ORDER BY prod_id, cardinality;
-result:
PROD_ID CARDINALITY
---------- -----------
2056 3
2268 3
3060 3
3106 3
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