Query Syntax - WHERE fieldname1='fieldvalue1' AND fieldname2='fieldvalue2'

Query Syntax - I have a syntax error when I am using an AND in the WHERE clause for a double field=value restriction #1 RUNS OK $query = "SELECT $field_name FROM classifieds WHERE $field_name = '$field_value'"; $result = mysql_query($query) or die(mysql_error()); #2 FAILS $query = "SELECT $field_name FROM classifieds WHERE $field_name1 = '$field_value1' AND $field_name2 ='$field_value2'"; $result = mysql_query($query) or die(mysql_error()); dies with the following message: Warning: mysql_query() [http://www.mysql.com/doc]: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'FROM classifieds WHERE trans_type = 'For Sale' AND category ='Boats'' at line 1 in C:\apache2triad\htdocs\ Background: I call a function and pass a $field_name = $field_value pair. This works OK. When I add a second field_name = $field_value pair the query dies. Data excerpt from TABLE classifieds: trans_type = Free category = Books Also, Can anyone recommend a good book on mySQL / php? I could not find a good example of my problem in the online manual http://www.mysql.com/doc. TIA Mark