One of the built-in aggregate functions in
relational database systems, that returns the number of rows
in a result. The argument to the function is nearly always
SELECT COUNT(*) FROM books
which returns the number of rows in the "books" table. If,
instead, we say
SELECT COUNT(publisher) FROM books
then only rows with a non-null
value in the "publisher"
column will be counted.
Last updated: 2010-09-26
Cougar ♦ cough and die ♦ count ♦ countable ♦ countably many ♦ counted
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