Check if value exist in mysql

Question

I have a small script to upload data to mysql database from a csv file and I want to check the list of values that are inside of the csv file.

CSV File:

Answer 1

Please check mysql exists subqueries.

Exists and Not Exists subqueries

Answer 2

As others have said, you should really use PDO. But, to answer your question, mysql_num_rows is your solution.

$query = mysql_query("SELECT * FROM products WHERE code='$line_of_data[0]' AND alert_quantity = '$line_of_data[1]'") or die(mysql_error());

if (mysql_num_rows($query))
// Data is already in database
else
// Data not in database