Question

我有一个每月更新的mysql查询，并且希望有一个自动更新的查询。当前查询是：

SELECT SUM((pm.meta_value = '0' AND p.post_status = 'wc-active') or pm.meta_value > '2018-10-01 23:59:59') AS SEPTEMBER,
       SUM((pm.meta_value = '0' AND p.post_status = 'wc-active') or pm.meta_value > '2018-10-01 23:59:59') AS OCTOBER,
       SUM((pm.meta_value = '0' AND p.post_status = 'wc-active') or pm.meta_value > '2018-11-01 23:59:59') AS NOVEMBER
FROM simp_posts p INNER JOIN
     simp_postmeta pm
     ON p.ID = pm.post_id
WHERE pm.meta_key = '_schedule_end' AND
      p.post_status IN ('wc-active', 'wc-pending-cancel')

该查询的结果如下：

September    October    November 
242          227         214

每个月我都会更改“ pm.meta_value>”和AS之后的日期。我想要的是用：

替换此硬编码的日期

first day of next month (+1) at 23:59:59 AS MMMM (next month in all letters)
first day of next month (+2) at 23:59:59 AS MMMM (next month in all letters)
first day of next month (+3) at 23:59:59 AS MMMM (next month in all letters)

有可能吗？

谢谢，我希望我已经清楚了。

Answer 1

好，所以我没有尝试过，但是我相信它应该可以工作

SET @firstMonthDate = DATE_ADD(LAST_DAY(NOW()), INTERVAL 2 DAY);
SET @firstMonthName = UPPER(DATE_FORMAT(@firstMonthDate, '%M'));

SET @secondMonthDate = DATE_ADD(LAST_DAY(DATE_ADD(NOW(), INTERVAL 1 MONTH)), INTERVAL 2 DAY);
SET @secondMonthName = UPPER(DATE_FORMAT(@secondMonthDate, '%M'));

SET @thirdMonthDate = DATE_ADD(LAST_DAY(DATE_ADD(NOW(), INTERVAL 2 MONTH)), INTERVAL 2 DAY);
SET @thirdMonthName = UPPER(DATE_FORMAT(@thirdMonthDate, '%M'));

SET @query = concat("SELECT SUM((pm.meta_value = '0' AND p.post_status = 'wc-active') or pm.meta_value >= ",@firstMonthDate,") AS ",@firstMonthName,",
       SUM((pm.meta_value = '0' AND p.post_status = 'wc-active') or pm.meta_value >= ",@secondMonthDate,") AS ",@secondMonthName,",
       SUM((pm.meta_value = '0' AND p.post_status = 'wc-active') or pm.meta_value >= ",@thirdMonthDate,") AS ",@thirdMonthName,"
FROM simp_posts p INNER JOIN
     simp_postmeta pm
     ON p.ID = pm.post_id
WHERE pm.meta_key = '_schedule_end' AND
      p.post_status IN ('wc-active', 'wc-pending-cancel')");

PREPARE stmt FROM @query;
EXECUTE stmt;

因此，我们将接下来三个月的名称和日期转换为变量，然后从中创建查询字符串，然后执行stmt。

我更改了您与23:59:59> date进行比较的部分，但是我认为它应该仍然可以正常工作。如果出现任何错误，我认为应该是与缺少引号有关的内容或应该调试的东西。

希望它能起作用。让我知道结果。

使用相对日期创建MYSQL查询

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