0
这是我目前所拥有的。MySQL选择子查询
$db =& JFactory::getDBO();
$query = $db->getQuery(true);
$query->select('`#__catalog_commit`.`id` as id, `#__catalog_commit`.`date` as date, COUNT(`#__catalog_commit_message`.`commit_id`) as count,
(SELECT COUNT(`#__catalog_commit_message`.`type`) as count_notice FROM `#__catalog_commit_message` WHERE `#__catalog_commit_message`.`type` = 1 GROUP BY `#__catalog_commit_message`.`type`) as count_notice,
(SELECT COUNT(`#__catalog_commit_message`.`type`) as count_warning FROM `#__catalog_commit_message` WHERE `#__catalog_commit_message`.`type` = 2 GROUP BY `#__catalog_commit_message`.`type`) as count_warning,
(SELECT COUNT(`#__catalog_commit_message`.`type`) as count_error FROM `#__catalog_commit_message` WHERE `#__catalog_commit_message`.`type` = 3 GROUP BY `#__catalog_commit_message`.`type`) as count_error');
$query->from('#__catalog_commit_message');
$query->leftjoin('`#__catalog_commit` ON `#__catalog_commit`.`id` = `#__catalog_commit_message`.`commit_id`');
$query->group('`#__catalog_commit_message`.`commit_id`');
$query->order('`#__catalog_commit`.`id` DESC');
我有什么是2代表具有以下结构:
catalog_commit
==============
id
date
catalog_commit_message
======================
id
commit_id
type
message
基本上我想有每个不同类型的每组项目的消息的计数。在我有它实际上选择每一行(这是正常的),但我正在寻找一种方式(如果可能,尼克尔)有在查询中的每个消息类型的计数。
编辑:只是想补充说它是一个JModelList。
非常好,我真的需要更多地学习MySQL。谢谢。 – Manhim