輸出兩列的MySQL

Question

我的MySQL查詢像這樣：

SELECT * 
FROM products_description pd 
LEFT JOIN products zp 
    ON pd.products_id = zp.products_id 
LIMIT 0 , 1000 

這只是連接兩個表一起，並輸出基於相同的產品編號列和行。現在我只需要將列縮小到兩個，column_a AND column_b

我該如何去做呢？

@ EDIT 當兩個表連接在一起時，我無法獲取主鍵以編輯表。我如何繞過它以獲得主鍵（唯一）並在連接時使表可編輯。

Answer 1

試試這個，SELECT pd.column_a, pd.column_b

SELECT pd.column_a, pd.column_b 
FROM products_description pd 
LEFT JOIN products zp 
    ON pd.products_id = zp.products_id 
LIMIT 0 , 1000 

Answer 2

SELECT column_a, column_b 
FROM products_description pd 
LEFT JOIN products zp 
    ON pd.products_id = zp.products_id 
LIMIT 0 , 1000 

Answer 3

你只需要選擇那些兩列

SELECT column_a , column_b 
    FROM products_description pd 
    LEFT JOIN products zp 
    ON pd.products_id = zp.products_id 
    LIMIT 0 , 1000