Help with a $wpdb MySQL Query

• matthewhaigh

• May 26, 2016 at 3:25 am

I’m wanting to expand on the following query to look at multiple meta_key and meta_value values that have been created within ACF.

e.g.

meta_key ‘colours_%_colour’ meta_value ‘Red’

AND

meta_key ‘colours_%_design_style’ meta_value ‘Plain’

This is what I have so far which I came across on the ACF Documentation (https://www.advancedcustomfields.com/resources/querying-the-database-for-repeater-sub-field-values/)

It successfully retrieves results with the color (sub field) of red.

$rows = $wpdb->get_results($wpdb->prepare(

"
SELECT *
FROM {$wpdb->prefix}postmeta
WHERE meta_key LIKE %s
    AND meta_value REGEXP %s
",
'colours_%_colour', // meta_name
'red' // meta_value

));

Thanks,

Matt.

• James

• May 26, 2016 at 2:17 pm

Hi @matthewhaigh

It depends on how you want the subfields to show up. Here’s an example if you want to show any subfields with certain value:

$rows = $wpdb->get_results($wpdb->prepare( 
    "
    SELECT * 
    FROM {$wpdb->prefix}postmeta
    WHERE
        ( meta_key LIKE %s AND meta_value = %s) OR
        ( meta_key LIKE %s AND meta_value = %s)
    ",
    'colours_%_colour', 'red',
    'images_%_type', 'type_3'
));

You can combine it with any keys and values you want. To learn more about the AND and OR syntax, please take a look at this page: http://www.hackingwithphp.com/9/3/13/multiple-where-conditions.

Also, I’m afraid this is a MySQL topic. For further support, please visit WordPress support forum or MySQL community instead.

Thanks 🙂

• matthewhaigh

• May 26, 2016 at 6:31 pm

Hi James

Thanks for taking time to answer my question, the support is appreciated.

Thanks,

Matt