Databases
StackOverflow2013
Postsdbo
PO
 

Note that there are some explanatory texts on larger screens.

plurals
  1. PO
    primarykey
    data
    text
    <p>No, it's not possible to get an array within an array as the result directly from a relational (SQL) database.</p> <p>You'll need to loop over the results and create the array yourself, e.g.</p> <pre><code>$productsById = array(); foreach ($dbRows as $row) { if (!isset( $productsById[$row['product_id']] )) { $product = array( 'id' =&gt; $row['product_id'], 'name' =&gt; $row['product_name'] ); //note the use of the &amp; to set the $product array by reference $productsById[$row['product_id']] = &amp;$product; } //note the use of the &amp; to retrieve the $product array by reference else $product = &amp;$productsById[$row['product_id']]; $product['images'][] = array( 'id' =&gt; $row['image_id'] ); //We unset this because we accessed it by reference above; this prevents referencing the wrong product //on the next iteration of the loop. unset($product); } </code></pre> <p>Or, to get an array of objects:</p> <pre><code>$productsById = array(); foreach ($dbRows as $row) { if (!isset( $productsById[$row['product_id']] )) { $product = new stdClass; $product-&gt;id = $row['product_id']; $product-&gt;name = $row['product_name']; $product-&gt;images = array(); $productsById[$row['product_id']] = $product; } else $product = $productsById[$row['product_id']]; $image = new stdClass; $image-&gt;id = $row['image_id']; $product-&gt;images[] = $image; } </code></pre> <p>It's also worth mentioning, however, that if you're using MySQL (and database portability isn't a concern), you can make use of the GROUP_CONCAT function, e.g.:</p> <pre><code>SELECT p.id as product_id, p.name as product_name, GROUP_CONCAT(i.id) as image_ids FROM product p LEFT JOIN image i ON p.id = i.product_id GROUP BY p.id </code></pre> <p>Then in your PHP, you'd have only one $row array for each product, and you could get the image IDs simply by using:</p> <pre><code>$imageIds = explode(',', $row['image_ids']); </code></pre>
    singulars
    1. This table or related slice is empty.
    1. POgetting combined result in sql
      singulars
      1. PTQuestion
    1. PTAnswer
    1. USMatt Browne
    1. USMatt Browne
    plurals
    1. This table or related slice is empty.
    1. This table or related slice is empty.
    1. POgetting combined result in sql
      singulars
      1. PTQuestion
    1. This table or related slice is empty.
    1. VO
      singulars
      1. PO
      1. This table or related slice is empty.
      1. VTAcceptedByOriginator
    1. COthank you very much..
      singulars
      1. PO
      1. USVeysel Bozdoğanoğlu
    2. COThere was a bug in my first example above; I've now corrected it.
      singulars
      1. PO
      1. USMatt Browne
    3. COThis of course assumes that every product has images; if not, you'd need to check `empty($row['image_id'])` to test if there was an image ID or not before adding it to the images array.
      singulars
      1. PO
      1. USMatt Browne
 

Querying!

 
Guidance
A row detail

Detail views are divided into sections. All the information in the data section comes from columns in the selected row. The other sections display data from other, related rows.

Related data can be related in a to-one or a to-many fashion. Captions of data related in a to-many fashion link to a list view showing a filtered view of the table.

Try moving around until you find a non-empty to-many entry and click on the label to get to one. You can move back to the root by clicking on the database name in the header.

SQuiL has stopped working due to an internal error.

If you are curious you may find further information in the browser console, which is accessible through the devtools (F12).

Reload