diff --git a/reference/mysql/functions/mysql-affected-rows.xml b/reference/mysql/functions/mysql-affected-rows.xml
index 61b8f7b6d4..ccf974fb4e 100644
--- a/reference/mysql/functions/mysql-affected-rows.xml
+++ b/reference/mysql/functions/mysql-affected-rows.xml
@@ -1,5 +1,5 @@
 <?xml version="1.0" encoding="iso-8859-1"?>
-<!-- $Revision: 1.15 $ -->
+<!-- $Revision: 1.16 $ -->
 <!-- splitted from ./en/functions/mysql.xml, last change in rev 1.2 -->
   <refentry id="function.mysql-affected-rows">
    <refnamediv>
@@ -42,12 +42,15 @@
       equal the number of rows matched, only the number of rows that
       were literally affected by the query.
      </para>
+     <para>
+      REPLACE statement deletes the record with the same primary key first and
+      then inserts the new record. This function returns the number of deleted
+      records plus the number of inserted records.
+     </para>
     </note>
     <para>
-     <function>mysql_affected_rows</function> does not work with
-     SELECT statements; only on statements which modify records. To
-     retrieve the number of rows returned by a SELECT, use
-     <function>mysql_num_rows</function>.
+     To retrieve the number of rows returned by a SELECT, it is possible to
+     use also <function>mysql_num_rows</function>.
     </para>
     <para>
      If the last query failed, this function will return -1.