Mysql database problem, what does the statement mean

$query = "SELECT OrderID from Orders where                 CustomerID = $customerid and                 amount >". $_session[' Total_price ']. " -.001 and//What do you mean by this sentence?                amount < ". $_session[' Total_price ']." +.001  and//What do you mean by this sentence?                date = ' $date ' and                order_status = ' PARTIAL ' and                ship_name = ' $ship _name ' and                ship_address = ' $ship _addre SS ' and                ship_city = ' $ship _city ' and                ship_state = ' $ship _state ' and                ship_zip = ' $ship _zip ' and                

Reply to discussion (solution)

Total_price value up/down floating 0.001

Check out the actual contents of the $query in the PHP breakpoint debugging.

Check out the actual contents of the $query in the PHP breakpoint debugging.

How to debug breakpoints, I only know that C + + can be debugged, PHP can also?? Please advise. And this is what is up and down floating ah, still do not understand AH

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