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In SQL, COUNT() differs from COUNT(column_name) in that COUNT():

148Medium DSSSB TGT Computer Science 0 replies

In SQL, COUNT(*) differs from COUNT(column_name) in that COUNT(*):

AIgnores duplicate rows
BCounts all rows, including those with NULL in the specified column
COnly counts numeric columns
DReturns an error if the table is empty

Correct answer: B

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