PLEASE BE AWARE: If you do an OUTER LEFT JOIN and set PDO FetchALL to PDO::FETCH_ASSOC, any primary key you used in the OUTER LEFT JOIN will be set to a blank if there are no records returned in the JOIN. For example: php //query the product table and join to the image table and return any images, if we have any, for each product. PDO has no placeholder for identifiers, so a developer must manually format them. To properly format an identifier, follow these two rules: *Enclose identifier in backticks. I have a problem with INNER JOIN and PDO. My query is working just fine when not using INNER JOIN. If you need rows returned from the first table regardless of matches in the second, you must use a LEFT JOIN instead. Browse other questions tagged php mysql join pdo inner-join or ask your own question. asked. 4 years, 3 months ago.
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