count

<programming, database>

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 often "*", e.g. 

  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

Nearby terms:

Cougar ♦ cough and die ♦ count ♦ countable ♦ countably many ♦ counted

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