刪除行選擇

Question

我有這個SQL語句MSQL是選擇我想要的東西（我要尋找並試圖刪除舊數據）：

SELECT * 
FROM `reviews` as r 
JOIN items as i 
ON i.item_id = r.item_id 
JOIN master_cat as c 
ON i.cat_id = c.cat_id 
WHERE category is null 

現在，我需要一種只從名爲reviews的表中刪除這些行的方法。我會如何去做這件事？

Answer 1

的DELETE說法是，

DELETE r 
FROM reviews r 
     INNER JOIN items i ON i.item_id = r.item_id 
     INNER JOIN master_cat c ON i.cat_id = c.cat_id 
WHERE category is null