How to retrieve data from 2 tables? [closed]

Answer 1

Table Prefix should be first. So that your query would like as follow:

$sql="select products.product_title, cart.qty from products Inner Join cart on procucts.product_id=cart.p_id ";

Answer 2

This is explain for first answer (by KinjaMistry).

You must be code grammar always! You must write reserved SQL words in uppercase always. You must format your code always. This avoid such problems and errors in future.

SELECT
        cart.qty,
        products.product_title
    FROM cart /* select first from cart beacause here cart is "parent" data */
    INNER JOIN products /* join "dependency" data */
        ON products.product_id = cart.p_id /* compare as dependency<->parent (like native: you<-above->friend) */

Answer 3

You mistake when you select & join clause the table column name. It should be appears first table name than column name like this.

$sql = "SELECT products.product_title, cart.qty FROM products INNER JOIN cart ON products.product_id = cart.p_id";

More about join: MySQL join