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प्रश्न
Which aggregate function can be used to find the cardinality of a table?
पर्याय
sum()
count()
avg()
max()
MCQ
उत्तर
count()
Explanation:
Cardinality describes the number of rows in a table. The COUNT() aggregate function is used to calculate the number of rows in a table or the number of non-null entries in a given column.
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