Question

如果这让你们大吃一惊，请耐心等待。

我的页面中有6个查询。所有查询都在同一个mysql表中运行，但是where子句不同。

目前我逐个执行这些查询。但是我需要将这些sql查询组合到单个视图或单个查询以根据material_id显示记录。

查询如下，

$a_recieved="SELECT material_id,SUM(recieved_quantity-damage_quantity-returned_quantity) AS re_total_quantity,SUM(each_price) AS re_total_price,SUM(purchase_quantity) AS re_total_purchase FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Recieved'";

$a_purchased="SELECT material_id,SUM(purchase_quantity) AS total_p FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Purchase'"));

$a_production="SELECT material_id,SUM(recieved_quantity) AS pr_total_quantity,SUM(each_price) AS pr_total_price FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Production'";

$a_fg="SELECT material_id,SUM(recieved_quantity) AS fg_total_quantity,SUM(each_price) AS fg_total_price FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Fgoods'";

$a_returned="SELECT material_id,SUM(recieved_quantity) AS rt_total_quantity,SUM(each_price) AS rt_total_price FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Return'";

$a_transfered="SELECT material_id,SUM(recieved_quantity) AS tr_total_quantity,SUM(each_price) AS tr_total_price FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Transfer'";

对不起，这可能不是有效的方法。

有可能在单个查询中执行这些操作吗？或者我必须使用mysql Views吗？如果是这样，请告诉我这个。感谢

Answer 1

如果您的6个查询返回相同数量的列和相同类型的数据（即始终ID，数量，总价格），那么您使用UNION的单个查询。

 SELECT 'Received' as Operation, id, quantity, price FROM table1
 UNION
 SELECT 'Purchased', id, quantity, price FROM table2
 UNION
 ...

Answer 2

试试这个

$query="SELECT material_id,SUM(recieved_quantity-damage_quantity-returned_quantity) AS re_total_quantity,SUM(each_price) AS re_total_price,SUM(purchase_quantity) AS re_total_purchase FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Recieved'
UNION
SELECT material_id,SUM(purchase_quantity) AS total_p FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Purchase'
UNION
SELECT material_id,SUM(recieved_quantity) AS pr_total_quantity,SUM(each_price) AS pr_total_price FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Production'
UNION
SELECT material_id,SUM(recieved_quantity) AS fg_total_quantity,SUM(each_price) AS fg_total_price FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Fgoods'
UNION
SELECT material_id,SUM(recieved_quantity) AS rt_total_quantity,SUM(each_price) AS rt_total_price FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Return'
UNION
SELECT material_id,SUM(recieved_quantity) AS tr_total_quantity,SUM(each_price) AS tr_total_price FROM purchase_table WHERE material_id='".$info['material_id']."' AND added_time<NOW() AND item_status='Transfer'";

使用SQL的UNION函数。 http://www.mysqltutorial.org/sql-union-mysql.aspx

抱歉，如果符合您的要求，则无法验证结果。但也许你可以找到解决方法。

如何从同一个mysql表中的多个select语句创建一个视图？

2 个答案: