MySQL如何實(shí)現(xiàn)按時(shí)間統(tǒng)計(jì)數(shù)據(jù)

這篇文章主要介紹了MySQL如何實(shí)現(xiàn)按時(shí)間統(tǒng)計(jì)數(shù)據(jù)，具有一定借鑒價(jià)值，需要的朋友可以參考下。希望大家閱讀完這篇文章后大有收獲。下面讓小編帶著大家一起了解一下。

在做數(shù)據(jù)庫的統(tǒng)計(jì)時(shí)，經(jīng)常會需要根據(jù)年、月、日來統(tǒng)計(jì)數(shù)據(jù)，然后配合echarts來制作可視化效果。

• 數(shù)據(jù)庫：MySQL

思路

• 按照時(shí)間維度進(jìn)行統(tǒng)計(jì)的前提是需要數(shù)據(jù)庫中有保留時(shí)間信息，建議是使用MySQL自帶的datetime類型來記錄時(shí)間。

`timestamp` datetime DEFAULT NULL,

• 在MySQL中對于時(shí)間日期的處理的函數(shù)主要是DATE_FORMAT(date,format)?？捎玫膮?shù)如下

注：當(dāng)涉及到按日統(tǒng)計(jì)是，需要使用%j，而如果使用%d, %e, %w的話，那么不同月份/周里的相同值會統(tǒng)計(jì)在一起。

• 涉及到獲取當(dāng)前時(shí)間，則可以通過now()或者sysdate()來獲取。

SELECT SYSDATE() FROM DUAL;
SELECT NOW() FROM DUAL;

• 按照實(shí)際需求使用group by查詢即可。

結(jié)論

需統(tǒng)計(jì)的表結(jié)構(gòu)如下：

CREATE TABLE `apilog` (
  `id` int(11) NOT NULL AUTO_INCREMENT,
  `username` varchar(64) DEFAULT NULL,
  `action` varchar(64) DEFAULT NULL,
  `params` text,
  `result` text,
  `timestamp` datetime DEFAULT NULL,
  PRIMARY KEY (`id`)
)

• 統(tǒng)計(jì)時(shí)間范圍內(nèi)不同分類action的數(shù)量

  # 當(dāng)日
  SELECT action, COUNT(id) count FROM apilog WHERE DATE_FORMAT(`timestamp`,'%j') = DATE_FORMAT(now(),'%j') ORDER BY count desc;
  # 當(dāng)周
  SELECT action, COUNT(id) count FROM apilog WHERE DATE_FORMAT(`timestamp`,'%u') = DATE_FORMAT(now(),'%u') ORDER BY count desc;
  # 當(dāng)月
  SELECT action, COUNT(id) count FROM apilog WHERE DATE_FORMAT(`timestamp`,'%m') = DATE_FORMAT(now(),'%m') ORDER BY count desc;
  # 當(dāng)年
  SELECT action, COUNT(id) count FROM apilog WHERE DATE_FORMAT(`timestamp`,'%Y') = DATE_FORMAT(now(),'%Y') ORDER BY count desc;

• 統(tǒng)計(jì)某分類action的時(shí)間維度數(shù)量

  # 按日
  SELECT action, DATE_FORMAT(`timestamp`,'%j'), COUNT(id) count FROM apilog WHERE action = 'xxx' GROUP BY DATE_FORMAT(`timestamp`,'%j')
  # 按周
  SELECT action, DATE_FORMAT(`timestamp`,'%u'), COUNT(id) count FROM apilog WHERE action = 'xxx' GROUP BY DATE_FORMAT(`timestamp`,'%u')
  # 按月
  SELECT action, DATE_FORMAT(`timestamp`,'%m'), COUNT(id) count FROM apilog WHERE action = 'xxx' GROUP BY DATE_FORMAT(`timestamp`,'%m')
  # 按年
  SELECT action, DATE_FORMAT(`timestamp`,'%Y'), COUNT(id) count FROM apilog WHERE action = 'xxx' GROUP BY DATE_FORMAT(`timestamp`,'%Y')

  同時(shí)按action和時(shí)間維度統(tǒng)計(jì)

  # 按日
  SELECT action, DATE_FORMAT(`timestamp`,'%j'), COUNT(id) count FROM apilog GROUP BY action, DATE_FORMAT(`timestamp`,'%j')
  # 按周
  SELECT action, DATE_FORMAT(`timestamp`,'%u'), COUNT(id) count FROM apilog GROUP BY action, DATE_FORMAT(`timestamp`,'%u')
  # 按月
  SELECT action, DATE_FORMAT(`timestamp`,'%m'), COUNT(id) count FROM apilog GROUP BY action, DATE_FORMAT(`timestamp`,'%m')
  # 按年
  SELECT action, DATE_FORMAT(`timestamp`,'%Y'), COUNT(id) count FROM apilog GROUP BY action, DATE_FORMAT(`timestamp`,'%Y')

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