( [resource link_identifier] )
fbsql_affected_rows() returns the number
of rows affected by the last INSERT, UPDATE or DELETE query
associated with link_identifier. If the
link identifier isn't specified, the last link opened by
fbsql_connect() is assumed.
If you are using transactions, you need to call
fbsql_affected_rows() after your INSERT,
UPDATE, or DELETE query, not after the commit.
If the last query was a DELETE query with no WHERE clause, all of
the records will have been deleted from the table but this
function will return zero.
When using UPDATE, FrontBase will not update columns where the
new value is the same as the old value. This creates the
possibility that fbsql_affected_rows() may not
actually equal the number of rows matched, only the number of
rows that were literally affected by the query.
If the last query failed, this function will return -1.
See also: fbsql_num_rows().