Answer / ramki

cardinality refers to the uniqueness of data values in the
particular column of database table.

Answer / siddharthapenchala

It refers to uniqueness of data contained in a column...

Answer / 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.

Answer / suresh.somayajula

it is nothing but collection of tuples in a relation or
collection of attributes in a relation .

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