db2_num_rows(3) [php man page]

DB2_NUM_ROWS(3) 							 1							   DB2_NUM_ROWS(3)

db2_num_rows - Returns the number of rows affected by an SQL statement

SYNOPSIS

       int db2_num_rows (resource  $stmt)

DESCRIPTION

	Returns the number of rows deleted, inserted, or updated by an SQL statement.

	To  determine  the  number  of	rows  that  will be returned by a SELECT statement, issue SELECT COUNT(*) with the same predicates as your
       intended SELECT statement and retrieve the value.

	If your application logic checks the number of rows returned by a SELECT statement and branches if the number of rows is 0, consider modi-
       fying  your  application  to  attempt  to  return  the  first row with one of db2_fetch_assoc(3), db2_fetch_both(3), db2_fetch_array(3), or
       db2_fetch_row(3), and branch if the fetch function returns FALSE.

       Note

	       If you issue a SELECT statement using a scrollable cursor, db2_num_rows(3) returns the number of rows returned by the SELECT state-
	      ment.  However,  the  overhead  associated with scrollable cursors significantly degrades the performance of your application, so if
	      this is the only reason you are considering using scrollable cursors, you should use a forward-only cursor and  either  call  SELECT
	      COUNT(*) or rely on the boolean return value of the fetch functions to achieve the equivalent functionality with much better perfor-
	      mance.

PARAMETERS

	      o $stmt
		- A valid stmt resource containing a result set.

RETURN VALUES

	Returns the number of rows affected by the last SQL statement issued by the specified statement handle.

PHP Documentation Group 													   DB2_NUM_ROWS(3)

PDO.EXEC(3)								 1							       PDO.EXEC(3)

PDO
::exec - Execute an SQL statement and return the number of affected rows

SYNOPSIS

       public int PDO::exec (string  $statement)

DESCRIPTION

       PDO.exec(3) executes an SQL statement in a single function call, returning the number of rows affected by the statement.

       PDO.exec(3)  does  not return results from a SELECT statement. For a SELECT statement that you only need to issue once during your program,
       consider issuing PDO.query(3). For a statement that you need to issue multiple times, prepare a PDOStatement object with PDO.prepare(3) and
       issue the statement with PDOStatement.execute(3).

PARAMETERS

	      o $statement
		- The SQL statement to prepare and execute.  Data inside the query should be properly escaped.

RETURN VALUES

       PDO.exec(3) returns the number of rows that were modified or deleted by the SQL statement you issued. If no rows were affected, PDO.exec(3)
       returns 0.

       Warning

	      This function may return Boolean FALSE, but may also return a non-Boolean value which evaluates to FALSE. Please read the section on
	      Booleans for more information. Use the === operator for testing the return value of this function.

	The following example incorrectly relies on the return value of PDO.exec(3), wherein a statement that affected 0 rows results in a call to
       die(3):

       <?php
       $db->exec() or die(print_r($db->errorInfo(), true));
       ?>

EXAMPLES

       Example #1

	      Issuing a DELETE statement

	       Count the number of rows deleted by a DELETE statement with no WHERE clause.

	      <?php
	      $dbh = new PDO('odbc:sample', 'db2inst1', 'ibmdb2');

	      /* Delete all rows from the FRUIT table */
	      $count = $dbh->exec("DELETE FROM fruit WHERE colour = 'red'");

	      /* Return number of rows that were deleted */
	      print("Deleted $count rows.
");
	      ?>

	      The above example will output:

	      Deleted 1 rows.

SEE ALSO

       PDO.prepare(3), PDO.query(3), PDOStatement.execute(3).

PHP Documentation Group 													       PDO.EXEC(3)