与去年/蒙特/周/天比较

Question

我有一个当前设置，在该设置中，我将数据库中的所有项目与查询类似的atm汇总：

$query01 = "
  SELECT COUNT(project_id) as total_week
  FROM projects
  WHERE WEEK(CURDATE(), 1) between WEEK(project_start, 1) and WEEK(project_delivery, 1)
";

并且每年/每月/每天都进行相同的查询。

我还想输出一个带有向上/向下箭头的比较，每个箭头分别与去年/月/周/日。

我如何实现这样的目标？ 预先感谢！

Answer 1

$thisweek = query("SELECT COUNT(project_id) as total_week
    FROM projects
    WHERE WEEK(CURDATE(), 1) between WEEK(project_start, 1) and WEEK(project_delivery, 1)");

$lastweek = query("SELECT COUNT(project_id) as total_last_week
    FROM projects
    WHERE WEEK(DATE_SUB(CURDATE(), INTERVAL 1 WEEK), 1) between WEEK(project_start, 1) and WEEK(project_delivery, 1)");

$comparison = $thisweek - $lastweek;

类似的事情应该可以做到，在这种情况下，我使用的“查询”功能假定仅提取单个计数。