mysql - 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并且column_b

我该怎么做？

@EDIT 当两个表连接时，我无法获取主键来编辑表。我如何绕过它以获得主键（唯一）并在加入时使表可编辑。

score 0 · Accepted Answer

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

score 0 · Accepted Answer

你只需要选择这两列

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

score 0 · Accepted Answer

尝试这个，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

3 回答 3