Question

I have a table with 4 values, meta_id, post_id, meta_key and meta_value, and I want to change all meta_values found as “yes” to “si” when the meta_key is stock_available… how do I do this?. I cannot even retrieve the rows at this point…I’m trying with something like this.

SELECT `meta_value` FROM `wp_postmeta` WHERE `meta_key` AND `meta_value` = 'yes'

Could I have some help?

EDIT: I had forgotten the meta_key…

SELECT * FROM `wp_postmeta` WHERE `meta_key` = 'stock_available' AND `meta_value` =  yes'

So I retrieve these… btu how do I update them?

Answer 1

You need to use the SQL UPDATE statement:

UPDATE wp_postmeta SET meta_value = 'si' WHERE meta_value = 'yes' AND meta_key = 'stock_available'

Before you do that, run this SELECT to make sure that you are going to be updating the correct rows:

SELECT * FROM wp_postmeta WHERE meta_value = 'yes' AND meta_key = 'stock_available'