sql1获取名称，sql2获取印象，我需要按印象对名称进行排序 [英] sql1 to get names and sql2 to get Impressions, I need to sort names by Impressions

问题描述

你好，我有这个项目，我需要帮助我

Hello I have this Project and I need to help me

$sql1 = "SELECT COUNT(*) as num FROM table1 where column1='1'";

    $total_Results = mysql_fetch_array(mysql_query($sql1));

    $total_Results = $total_Results[num];

    while($row = mysql_fetch_array($sql1))

        {

$sql2="select distinct column1 from table2 where column2='".$row['id']."' and left(date,10) BETWEEN '".$datefrom."' AND '".$dateto."'";

$res=mysql_query($sql2);

}

sql1获取名称，sql2获取印象，我需要按印象对名称进行排序

sql1 to get names and sql2 to get Impressions, I need to sort names by Impressions

名称|展示次数DESC

name | Impressions DESC

A | 10

B | 8

C | 7

或

名称|展示次数ASC

name | Impressions ASC

C | 7

B | 8

A | 10

感谢您的关注

推荐答案

我将添加与上一个问题几乎相同的答案.您可以通过联接而不是单独的查询来完成所有操作；

I'll add almost the same answer as on your previous question. You can do it all in a join instead of separate queries;

SELECT t1.id as name, COUNT(DISTINCT t2.column1) Impressions
FROM table1 t1
LEFT JOIN table2 t2
  ON t1.id=t2.column2
WHERE t1.column1 = 1
  AND LEFT(date,10) BETWEEN '2013-01-01' AND '2013-12-31'
GROUP BY t1.id
ORDER BY Impressions DESC

要测试的SQLfiddle .

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