php - 如何组合这些 mysql 查询

Question

查询 1

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

查询 2

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

请帮助我...

Answer 1

尝试使用此代码

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

就是这样

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