合并两个SQL查询的结果

Question

我该如何在SQL或PHP中组合这两个sql查询的结果..它们都涉及联接..我想将它们组合并按orderid对其进行排序..我该怎么做？

第一个查询

$sqlstr = "SELECT op.* FROM products_to_products_extra_fields AS p 
    INNER JOIN orders_roster AS r ON p.products_id = r.products_id 
    INNER JOIN orders_products AS op ON r.orders_id = op.orders_id
    INNER JOIN orders AS o on op.orders_id = o.orders_id
    WHERE p.products_extra_fields_id = 14
      AND p.products_extra_fields_value between '" 
         . tep_db_input($startdate) . "' and '" 
         . tep_db_input($enddate) . " 23:59:59'
      AND r.roster_status != 'Removed'
      AND o.payment_method = 'Institutional Billing'
      AND o.orders_status < 100001
    GROUP BY o.orders_id
    ORDER BY DECODE(o.cc_type, '$salt') ASC";  

第二查询

$sqlstr2 = "SELECT op.* FROM products_to_products_extra_fields AS p 
    INNER JOIN orders_products AS op ON p.products_id = op.products_id 
    INNER JOIN orders AS o on op.orders_id = o.orders_id
    WHERE p.products_id IN 
      (SELECT products_id 
        FROM products_to_products_extra_fields 
        WHERE p.products_id NOT IN 
          (SELECT products_id 
           FROM products_to_products_extra_fields 
           WHERE products_extra_fields_id = 14)
      )
      AND o.date_purchased between '" 
         . tep_db_input($startdate) . "' and '" 
         . tep_db_input($enddate) . " 23:59:59'
      AND o.payment_method = 'Institutional Billing'
      AND o.orders_status < 100001
    GROUP BY o.orders_id
    ORDER BY DECODE(o.cc_type, '$salt') ASC";  

Answer 1

如果您需要在PHP端将它们组合在一起，我将假设您剩下一个数组数组（MySQL行），您可以简单地遍历两组结果并使用array_push将其推入第3个（完整）数组。 您也可以使用array_merge进行修改，但有时使用多维数组时，最终结果并非您所期望的。

http://us3.php.net/manual/zh/function.array-push.php http://us3.php.net/function.array-merge

Answer 2

只需进行一个UNION查询并在SQL端合并结果即可。 无需PHP。