What is cardinality?

Answer Posted / cherie

In Oracle/PLSQL, the cardinality function returns the
number of elements in a nested table.

The syntax for the cardinality function is:

cardinality( nested table column )

nested table column is the column in the nested table that
you wish to return the cardinality for.



Note:

If the nested table is empty, the cardinality function will
return NULL.

If the nested table is a null collection, the cardinality
function will return NULL.

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