MySQL的更新數據，3臺

我沒有在WordPress的基礎自定義的表，現在我需要更新使用數據從wopdpress的表（thundbail鏈接）MySQL的更新數據，3臺

這裏選擇查詢表

SELECT p.post_parent, guid 
    FROM wp_postmeta AS pm 
INNER JOIN wp_posts AS p ON pm.meta_value=p.ID 
WHERE pm.post_id = 1552 
    AND pm.meta_key = '_thumbnail_id' 
ORDER BY p.post_date DESC 
LIMIT 1

答案： post_parent（fullproducts = postid）| guid（fullproducts = image）

1552 | URL

我tryed此代碼更新此表

UPDATE full_products, wp_postmeta AS pm 
SET full_products.image = wp_postmeta.guid 
INNER JOIN wp_posts AS p ON pm.meta_value=p.ID 
WHERE pm.post_id = full_products.postid 
AND pm.post_id = 1552 
    AND pm.meta_key = '_thumbnail_id' 
ORDER BY p.post_date DESC 
LIMIT 1

但此查詢行不通。你能檢查一下嗎？

來源

2013-05-26 user2421781

在'UPDATE'語句'INNER JOIN'是放錯了地方;把它放在'SET'關鍵字之前，與其他表一起。 – eggyal

你INNER JOIN使用UPDATE的方式有語法錯誤，正確的語法是

UPDATE full_products a 
LEFT JOIN wp_postmeta AS pm 
ON a.postid = pm.post_id 
LEFT JOIN wp_posts AS p 
ON pm.meta_value=p.ID 
SET a.image = pm.guid 
WHERE pm.post_id = 1552 
AND pm.meta_key = '_thumbnail_id'

來源

2013-05-26 07:53:38 Fabio

請看正確的選擇查詢，我的更新查詢可能是錯誤的。圖像的記錄是在wp_posts，在這裏你不使用這個 – user2421781

@ user2421781對不起，我剛更新它 – Fabio

謝謝！隨着你幫我得到了正確的查詢 UPDATE full_products fp LEFT JOIN wp_postmeta AS pm ON fp.postid = pm.post_id LEFT JOIN wp_posts AS p ON pm.meta_value=p.ID SET fp.image = p.guid WHERE pm.post_id = 1552 AND pm.meta_key = '_thumbnail_id' – user2421781

MySQL的更新數據，3臺

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