PHP INNER JOIN sql查询具有多个表的重复信息

Question

I'm having some trouble to make a query that get all the information from multiple tables with INNER JOIN. The table p_cards is the "main table" that have a relationship 1-M. This means that every other table ( p_images , p_infotext , p_rules can have multiple rows associated with the same ID)

My function is the following:

function GetpById($mysqli, $id) {
    if($stmt = $mysqli->prepare("
        SELECT * 
        FROM p_cards 
        INNER JOIN p_images ON p_images.card_id = p_cards.id
        INNER JOIN p_infotext ON p_infotext.card_id = p_cards.id
        INNER JOIN p_rules ON p_rules.card_id = p_cards.id
        WHERE p_cards.id = ?
    ")) {
        $stmt->bind_param("i", $id);
        $stmt->execute() or trigger_error($stmt->error, E_USER_ERROR);
        ($stmt_result = $stmt->get_result()) or trigger_error($stmt->error, E_USER_ERROR);
        if ($stmt_result->num_rows>0) {
            while($row_data = $stmt_result->fetch_assoc()){
                $array[] = $row_data;
            }
            return $array   
        } else {
            return false;
        }
    } else {
        return false;
    }
}

Using the above function it will create a complete row for each different row inside the other tables, making the information in p_cards duplicated for each. For example, the p_images table will have id , p_id , image , language . For each image that exists associated with that ID, it will associate the information of p_cards.

What I would like is not to have duplicated information. How can I achieve this?

Edit:

Table p_cards

Table p_images

There are other tables but it's enough to show it (since there are many tables, every of them working as 1-M)

When I do the query, I get the information of p_card for each information in p_images (and other tables):

This way I expect to get something like this so I can use the information to make a form to edit the data:

id
slug
card_number
...
--[images]
---[en]
----thumb_img
----full_size
----name
---[pt]
----thumb_img
...

Instead of having one row with all information. What would be the best approach?

Answer 1

You get multiple rows for the same card id because you have multiple rows for it in the tables you join with.

If you want to have only one row per card id, you can use GROUP BY p_cards.id, and then you can get a comma separated list of the different values in the other tables using GROUP_CONCAT() function.

However, in your situation I think it is better to do 3 seprate queries instead of doing this in a join.