Question

how to find cardinality
of table my sql​

Answer 1

An example would be the set "A". Let the set "A" be: A={1,2,3} - the cardinality of that set is |3|. If set "A" contains 5 values A={10,21,33,42,57}, then the cardinality is |5|. What that means in the context of mysql is that the cardinality of a table column is the count of that column's unique values.

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