MySQL query time basic tutorial-Mysql Tutorial-php.cn

MySQL query time basic tutorial

小云云

Release： 2017-11-29 11:35:14

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Perhaps we will have a headache during development when we need to count various report data. MySQL statements are very long and complex, so there is always a solution. Now I will share with you some basic SQL information. Statistical knowledge of time.

Now assume that there is such an order data table:

CREATE TABLE `order` (    
 `id` int(11) unsigned NOT NULL AUTO_INCREMENT,    
`order_sn` varchar(50) CHARACTER SET utf8 NOT NULL DEFAULT &#39;&#39; COMMENT &#39;订单编号，保证唯一&#39;,    
`create_at` int(11) NOT NULL DEFAULT &#39;0&#39; COMMENT &#39;创建时间&#39;,    
 `success_at` int(11) NOT NULL DEFAULT &#39;0&#39; COMMENT &#39;订单完成时间&#39;,    
 `creator_id` varchar(50) CHARACTER SET utf8 NOT NULL DEFAULT &#39;&#39; COMMENT &#39;订单创建人&#39;,    
PRIMARY KEY (`id`),    
UNIQUE KEY `uni_sn` (`order_sn`),    
 ) ENGINE=InnoDB AUTO_INCREMENT=1 DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT=&#39;订单表&#39;;

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Now take the above table as an example to query related data:

Query all completed order numbers today:

SELECT `order_sn` FROM `order` WHERE YEARWEEK(FROM_UNIXTIME(success_at,&#39;%Y-%m-%d&#39;)) = date_format(now(),&#39;%Y-%m-%d&#39;);

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Query all completed order numbers for the current week:

SELECT `order_sn` FROM `order` WHERE YEARWEEK(FROM_UNIXTIME(success_at,&#39;%Y-%m-%d&#39;)) = YEARWEEK(now());

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Query all completed order numbers for last week:

SELECT `order_sn` FROM `order` WHERE YEARWEEK(FROM_UNIXTIME(success_at,&#39;%Y-%m-%d&#39;)) = YEARWEEK(now())-1;

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Query all completed order numbers for the current month :

select `order_sn` from `order` where FROM_UNIXTIME(success_at,&#39;%Y-%m&#39;)=date_format(now(),&#39;%Y-%m&#39;);

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Query all completed order numbers in the last month:

select `order_sn` from `order` where FROM_UNIXTIME(success_at,&#39;%Y-%m&#39;)=date_format(DATE_SUB(curdate(), INTERVAL 1 month),&#39;%Y-%m&#39;);

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Query all completed order numbers 6 months from now:

select `order_sn` from `order` where FROM_UNIXTIME(success_at,&#39;%Y-%m-%d %H:%i:%s&#39;) between date_sub(now(),interval 6 month) and now();

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Query all orders in this quarter Completed order number:

select `order_sn` from `order` where QUARTER(FROM_UNIXTIME(success_at,&#39;%Y-%m-%d&#39;))=QUARTER(now());

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Query all completed order numbers in the previous quarter:

select `order_sn` from `order` where QUARTER(FROM_UNIXTIME(success_at,&#39;%Y-%m-%d&#39;))=QUARTER(DATE_SUB(now(),interval 1 QUARTER));

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Query all completed order numbers this year:

select `order_sn` from `order` where YEAR(FROM_UNIXTIME(success_at,&#39;%Y-%m-%d&#39;))=YEAR(NOW());

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Query all completed order numbers in the previous year:

select `order_sn` from `order` where year(FROM_UNIXTIME(success_at,&#39;%Y-%m-%d&#39;))=year(date_sub(now(),interval 1 year));

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The above content is a tutorial on querying report time in MySQL. I hope it will be helpful to everyone.

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