首先我有一个表,它是枢轴看起来像这样
pivot_product_Id | productsxx_Id | category_Id | subcategory_Id | color_Id
---------------------------------------------------------------------------
1 | 1 | 1 | 1 | 1
2 | 1 | 1 | 1 | 2
3 | 3 | 1 | 1 | 3
4 | 4 | 1 | 2 | 4
5 | 4 | 1 | 2 | 5
6 | 2 | 2 | 4 | 6
7 | 5 | 2 | 5 | 7
我有这样的颜色表
color_Id | color | color2
------------------------------------------
1 | black | white
2 | blue | orange
3 | white | black
4 | purple | black
5 | black | green
6 | red | black
我的问题是在 ID 1 或 2 类别中......有多少黑色存在?从 color 和 color2 列计数
我尝试了类似的方法,但没有得到我想要的结果,需要帮助来创建正确的查询。
if(isset($shoes_post_var) || isset($nightwear_post_var)|| isset($outwear_post_var)){
$query3 = "SELECT count(*)
FROM pivot
JOIN category ON
pivot.category_Id = category.category_Id
JOIN subcategory ON
pivot.subcategory_Id = subcategory.subcategory_Id
JOIN color ON
pivot.color_Id = color.color_Id
JOIN productsxx ON
pivot.productsxx_Id = productsxx.productsxx_Id
WHERE
color IN ('$black')
or
color2 IN ('$black')
AND
category IN ('$shoes_post_var','$nightwear_post_var','$outwear_post_var')
GROUP BY pivot.color_Id ASC ";
$query5 = mysql_query($query3)or die(mysql_errno());
$total = mysql_result($query5, 0);
echo ' '.'('.$total.')';}