Syntax:
FOUND_ROWS()

A SELECT statement may include a LIMIT clause to restrict the number of
rows the server returns to the client. In some cases, it is desirable
to know how many rows the statement would have returned without the
LIMIT, but without running the statement again. To obtain this row
count, include a SQL_CALC_FOUND_ROWS option in the SELECT statement,
and then invoke FOUND_ROWS() afterward:

URL: http://dev.mysql.com/doc/refman/5.6/en/information-functions.html

