Php 如何组合这些mysql查询

问题1

问题2

$query = "SELECT stock_issue.*,stock_item.item_name 
  FROM stock_issue,stock_item
  WHERE stock_issue.idate>=$from 
    AND stock_issue.idate<=$to 
    AND stock_issue.item_id=stock_item.ID 
ORDER BY stock_issue.idate DESC";

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请帮帮我…

你可以用工会把它合并起来

$query = "SELECT stock_purchase.*,stock_item.item_name
  FROM stock_purchase,stock_item 
  WHERE stock_purchase.pdate>=$from 
    AND stock_purchase.pdate<=$to
    AND stock_purchase.itemid=stock_item.ID 
  ORDER BY stock_purchase.pdate DESC";

用UNION试试这个

(SELECT stock_issue.*,stock_item.item_name FROM stock_issue,stock_item where stock_issue.idate>=$from and stock_issue.idate<=$to and stock_issue.item_id=stock_item.ID) UNION (SELECT stock_purchase.*,stock_item.item_name FROM stock_purchase,stock_item where stock_purchase.pdate>=$from and stock_purchase.pdate<=$to and stock_purchase.itemid=stock_item.ID)

请尝试使用此代码

  $sql="SELECT stock_issue.*,stock_item.item_name FROM stock_issue,stock_item where stock_issue.idate>=$from and stock_issue.idate<=$to and stock_issue.item_id=stock_item.ID ORDER BY stock_issue.idate DESC
         UNION
        SELECT stock_purchase.*,stock_item.item_name FROM stock_purchase,stock_item where stock_purchase.pdate>=$from and stock_purchase.pdate<=$to and stock_purchase.itemid=stock_item.ID ORDER BY stock_purchase.pdate DESC";

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谢谢你的回复…我收到了你的回复…我收到了

SELECT stock_issue.*,stock_item.item_name 
  FROM stock_issue,stock_item
  WHERE stock_issue.idate>='$from' 
    AND stock_issue.idate<='$to' 
    AND stock_issue.item_id=stock_item.ID 
ORDER BY stock_issue.idate DESC

UNION

SELECT stock_purchase.*,stock_item.item_name
  FROM stock_purchase,stock_item 
  WHERE stock_purchase.pdate>='$from' 
    AND stock_purchase.pdate<='$to'
    AND stock_purchase.itemid=stock_item.ID 
  ORDER BY stock_purchase.pdate DESC

$sql=$query1.'UNION'.$query2;