如何将这3个查询合并为一个MySQL查询？

Question

下面的每个查询都给出了我个人想要的结果，但我想将它们组合成一个查询。

我要输出3个colums：$按行>天，按行$> otherPageCount，按行$> indexCount

有一个表tracking包含的所有数据。

1）。

SELECT COUNT(`page`) AS indexCount FROM `tracking` 
WHERE `page` = 'index.php' 
AND `date` 
BETWEEN DATE_ADD(NOW(),INTERVAL -30 DAY) 
AND NOW() 
GROUP BY DATE(`date`) 

2）。

SELECT COUNT(`page`) AS otherPageCount FROM `tracking` 
WHERE `page` != 'index.php' 
AND `date` 
BETWEEN DATE_ADD(NOW(),INTERVAL -30 DAY) 
AND NOW() 
GROUP BY DATE(`date`) 

3）。

SELECT DATE(`date`) AS day FROM `tracking` 
WHERE `date` 
BETWEEN DATE_ADD(NOW(),INTERVAL -30 DAY) 
AND NOW() 
GROUP BY DATE(`date`) 

Answer 1

SELECT DATE(`date`), 
     COUNT(`page`) AS indexCount, 
     SUM(`page` = 'index.php') as idx_count, 
     SUM(`page` <> 'index.php') as not_idx_count 
FROM `tracking` 
WHERE `date` BETWEEN DATE_ADD(NOW(),INTERVAL -30 DAY) AND NOW() 
GROUP BY DATE(`date`) 

Answer 2

您可以使用;如果此：

SELECT DATE(`date`), 
    SUM(IF(`page` = 'index.php', 1, 0)) indexCount, 
    SUM(IF(`page` != 'index.php', 1, 0)) otherPageCount 
FROM `tracking` 
WHERE `date` BETWEEN DATE_ADD(NOW(),INTERVAL -30 DAY) AND NOW() 
GROUP BY DATE(`date`) 

juergen's answer做同样的事情，但让若隐。如果你了解它的工作原理，那是更好的答案。