如何在MYSQL中组合多个SELECT语句

时间：2014-05-08 10:30:40

标签： php mysql sql

有人可以告诉我如何更有效地编写以下SELECT语句集合：

$sql="SELECT * FROM brand WHERE 
name NOT LIKE '' OR
name = 'Hot Brands'
ORDER BY name ";
$result=mysql_query($sql);

while($brand=mysql_fetch_array($result)){

?>

<?

$bid = $brand['brand_id'];
$sql2="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$result2=mysql_query($sql2);
$total = mysql_num_rows($result2); 

$bawtrysql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Bawtry' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$bawtryresult=mysql_query($bawtrysql);
$bawtrytotal = mysql_num_rows($bawtryresult); 

$chainsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Chain' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$chainresult=mysql_query($chainsql);
$chaintotal = mysql_num_rows($chainresult); 

$granthamsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Grantham' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$granthamresult=mysql_query($granthamsql);
$granthamtotal = mysql_num_rows($granthamresult); 

$internetsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Internet' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$internetresult=mysql_query($internetsql);
$internettotal = mysql_num_rows($internetresult); 

$bmsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND title = 'Mens' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Bawtry' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$bmresult=mysql_query($bmsql);
$bm = mysql_num_rows($bmresult); 

$blsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND title = 'Ladies' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Bawtry' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$blresult=mysql_query($blsql);
$bl = mysql_num_rows($blresult); 

$cmsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND title = 'Mens' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Chain' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$cmresult=mysql_query($cmsql);
$cm = mysql_num_rows($cmresult); 

$clsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND title = 'Ladies' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Chain' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$clresult=mysql_query($clsql);
$cl = mysql_num_rows($clresult); 

$gmsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND title = 'Mens' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Grantham' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$gmresult=mysql_query($gmsql);
$gm = mysql_num_rows($gmresult); 

$glsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND title = 'Ladies' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Grantham' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$glresult=mysql_query($glsql);
$gl = mysql_num_rows($glresult); 

$imsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND title = 'Mens' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Internet' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$imresult=mysql_query($imsql);
$im = mysql_num_rows($imresult); 

$ilsql="SELECT * FROM shop_orders WHERE  brand = '".$bid."' AND title = 'Ladies' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_location = 'Internet' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$ilresult=mysql_query($ilsql);
$il = mysql_num_rows($ilresult); 

$query = "SELECT SUM(shop_order_price) FROM shop_orders WHERE  brand = '".$bid."' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale'";
$result3 = mysql_query($query) or die(mysql_error());

while($row3 = mysql_fetch_array($result3)){
    ?>

    <?
    $showtotal = $row3['SUM(shop_order_price)'] ;
    $showaverage = $row3['SUM(shop_order_price)'] / $total ;
    ?>

            <tr>
                <td align="center"><strong><?=$brand['name'];?></strong></td>
                <td align="center"><?=$bm?></td>
                <td align="center"><?=$bl?></td>
                <td align="center"><?=$bawtrytotal?></td>
                <td align="center"><?=$cm?></td>
                <td align="center"><?=$cl?></td>
                <td align="center"><?=$chaintotal?></td>
                <td align="center"><?=$gm?></td>
                <td align="center"><?=$gl?></td>
                <td align="center"><?=$granthamtotal?></td>
                <td align="center"><?=$im?></td>
                <td align="center"><?=$il?></td>
                <td align="center"><?=$internettotal?></td>
                <td align="center"><strong><?=$total?></strong></td>
                <td align="center"><strong><?=round($showtotal, 2)?></strong></td>
                <td align="center"><strong><?=round($showaverage, 2)?></strong></td>
            </tr>

每个SELECT语句根据位置和性别提取与查询匹配的行数。匹配行的数量最终在底部回显到HTML中。表。

为了提高效率 - 我想知道是否可以结合所有这些语句来减少对数据库的调用次数。

我为这个烂摊子道歉 - 这不是我的代码！我最近来这个项目。

任何建议都将不胜感激。感谢

*更新*

好的，这是我的新SELECT语句：

SELECT * FROM shop_orders
LEFT JOIN product
ON shop_orders.shop_order_product_id=product.product_id
WHERE 
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."' AND shop_order_location = 'Bawtry' AND shop_order_action = 'Sale'

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND shop_order_location = 'Chain' AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND shop_order_location = 'Grantham'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND shop_order_location = 'Internet'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND category = 'Mens'  AND shop_order_location = 'Bawtry'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND category = 'Ladies' AND shop_order_location = 'Bawtry'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND category = 'Mens'   AND shop_order_location = 'Chain'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND category = 'Ladies'   AND shop_order_location = 'Chain'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND category = 'Mens'   AND shop_order_location = 'Grantham'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND category = 'Ladies'   AND shop_order_location = 'Grantham'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND category = 'Mens'   AND shop_order_location = 'Internet'  AND shop_order_action = 'Sale' 

OR
DATE(CONCAT(shop_order_year,'-',shop_order_month,'-',shop_order_day))
BETWEEN '".$start."' and '".$end."' AND brand = '".$bid."'
AND category = 'Ladies'   AND shop_order_location = 'Internet'  AND shop_order_action = 'Sale'" ;

我的新问题是如何绘制语句中每个OR变体的各个数字并将它们反映到HTML表格中？

由于

1 个答案:

答案 0 :(得分：0)

您无法合并SELECT，因为每个人都获取了一定数量的数据 - 如果您将它们合并 - 只需返回所有查询的总和。

但是，不是抓取所有元素而是抓取mysql_num_rows()，而是可以像这样更改您的查询：

$sql2="SELECT COUNT(*) FROM shop_orders WHERE  brand = '".$bid."' AND shop_order_month = '".$m."' AND shop_order_year = '".$y."' AND shop_order_action = 'Sale' ";
$total = mysql_fetch_array(mysql_query($sql2));

您不需要该行的所有元素（SELECT *），但您似乎只需要受影响的元素数量。所以COUNT(*)是您的选择！

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