输出两列mysql

Question

我得到了这样的mySQL查询：

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

这只是将两个表连接在一起，并根据相同的产品ID输出列和行。现在我只需要将列缩小到两个，column_a和column_b

我该如何解决？

@EDIT 当连接两个表时，无法获取主键以编辑表。如何使用主键（唯一）并在加入时使表格可编辑。

Answer 1

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

Answer 2

您只需选择这两列

即可

  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

试试这个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