mysql 数据库问题，该语句是什么意思
$query = select orderid from orders where
customerid = $customerid and
amount > .$_session['total_price'].-.001 and //这句是什么意思？
amount < .$_session['total_price'].+.001 and //这句是什么意思？
date = '$date' and
order_status = 'partial' and
ship_name = '$ship_name' and
ship_address = '$ship_address' and
ship_city = '$ship_city' and
ship_state = '$ship_state' and
ship_zip = '$ship_zip' and
ship_country = '$ship_country';
------解决方案--------------------
total_price 取值上下浮动0.001
------解决方案--------------------
在php中断点调试看一下 $query 的实际内容就明白了。