Clash Royale CLAN TAG#URR8PPP

Update product price if specific meta_key contains a specific meta_value

In Wordpress / Woocommerce database there is a wp_postmeta table.

wp_postmeta

I am try to update the meta_value = '0' where meta_key = '_price' only if another meta_key = 'group' and meta_value = 'glass' exist for the same post_id.

meta_value = '0'

meta_key = '_price'

meta_key = 'group'

meta_value = 'glass'

post_id

This is what I have tried:

UPDATE wp_postmeta SET meta_value = '0'
WHERE meta_key = '_price' AND meta_key = 'group' AND meta_value = 'glass';


And This one too:

UPDATE
`wp_postmeta`
SET
`meta_value` = '0'
WHERE
meta_key = '_price'
AND `meta_key` IN (
SELECT
`meta_value` = 'glass'
FROM
`wp_postmeta`
);


Those attempts doesn't work.

How can I update the meta_value = '0' (for meta_key = '_price') only if the meta_key = 'group' and meta_value = 'glass' exist for the same post_id?

meta_value = '0'

meta_key = '_price'

meta_key = 'group'

meta_value = 'glass'

post_id

Any help is appreciated.

1 Answer
1

Try this:

UPDATE wp_postmeta as pm
INNER JOIN wp_postmeta as pm2 on pm.post_id = pm2.post_id
SET pm.meta_value = '0'
WHERE pm.meta_key = '_price'
AND pm2.meta_key = 'group'
AND pm2.meta_value = 'glass';


it should work

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