Count Rows MySQL

Question

[I know mysqli is the new standard and I am in the process of updating, but for now I have questions about the old standard.]

I am trying to count the number of rows that match a query, then add a number to it.

$findTypes = "SELECT * _products WHERE product_type = '$productType'";
$queryTypes = mysql_query($findTypes, $db_products);
$numTypes = mysql_num_rows($queryTypes);
$productID = $numTypes + 100;

If there is already an existing product-type in the database, then there should return a result of 101, if there are two then 102, etc.

As it stands now this doesn't work... not sure why.

Thanks,

Answer 1

Your query is wrong, you have no FROM statement...

Try:

SELECT * FROM _products WHERE product_type = '$productType'

Answer 2

You could get the value from a single faster query, leaving MySQL to do all the work:

$findTypes = "SELECT COUNT(*) + 100 FROM _products "
           . "WHERE product_type = '$productType'";

Answer 3

Use mysql_error() function, something like

mysql_query($query) or die(mysql_error());

It will return error message, if your syntax is wrong.