In part 1 of this series, we learned about how to get posts by custom fields in WordPress with the WP_Query function. However, if we need to deal with databases, it’s better to find another faster, easier, and more convenient way. That method is joining wp_posts and wp_postmeta tables together, and then querying by SQL. In part 2 of the series “How to get posts by custom fields in WordPress”, we’ll use this way to add the advanced searching feature that allows users to search by keywords in posts / pages titles and custom fields content.

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