在MySQL中同时查询两个表格

Question

我有两个表格; productstorymap和stories。 productstorymap有productId和storyId列。 stories有id和status列。

我需要查询属于某个产品并具有一定状态的所有故事。我得最近的是

SELECT map.*, story.* 
FROM productstorymap map, stories story 
WHERE map.productId=1 AND story.status=1 

但它返回我不属于产品1，它返回像这样的故事：

Array 
(
    [0] => Array 
     (
      [id] => 1 
      [productId] => 1 
      [storyId] => 1 
      [name] => Create a User Story 
      [content] => Admin should be able to create user stories. 
      [duration] => 1 
      [priority] => 0 
      [created] => 2010-09-22 17:36:21 
      [edited] => 
      [status] => 1 
     ) 

    [1] => Array 
     (
      [id] => 4 
      [productId] => 1 
      [storyId] => 1 
      [name] => Bar 
      [content] => Xyzzy! 
      [duration] => 
      [priority] => 1 
      [created] => 2011-02-10 17:50:56 
      [edited] => 2011-02-10 17:50:56 
      [status] => 1 
     ) 

) 

即使productstorymap只有两行：

ID prodcutId storyID 
1 1   1 
2 7   4 

我正在使用MySQL和PHP，如果这是相关的。

Answer 1

我想你忘记他们一起在公共领域，我承担是productstorymap.storyID和stories.id

SELECT map.*, story.* 
FROM productstorymap map, stories story 
WHERE map.productId=1 
    AND story.status=1 
    and map.storyID = story.id 

Join -syntax也可以是这样的：

SELECT map.*, story.* 
FROM productstorymap map 
JOIN stories story on map.storyID = story.id 
WHERE map.productId=1 
    AND story.status=1; 

Answer 2

SELECT map.*, story.* 
FROM productstorymap map, stories story 
WHERE map.productId=1 AND story.status=1 AND map.storyId = story.Id 

这是调用表之间的JOIN。寻找它

Answer 3

SELECT * 
FROM productstorymap prod 
JOIN stories story ON prod.storyId = story.Id 
WHERE prod.productId = 1 
AND story.status = 1