按天统计，从数据库php和MySQLi中选择

Question

我制作了一个php代码，今天将带有计数的php代码插入到我的数据库中，但是我想在我的图表中显示它（Javascript）。

  var lineChartData = { labels : ["1","2","3","4","5","6","7","8","9","10","11","12","13","14","15","16","17","18","19","20","21","22","23","24","25","26","27","28","29","30"], datasets : [ { fillColor : "rgba(252, 130, 19, 0.74)", strokeColor : "#FC8213", pointColor : "#FC8213", pointStrokeColor : "#fff", data : [0,0,4,159,50,0,30,15,0,159,4,159,50,0,30,15,0,0,4,159,50,0,30,15,9,5,1,5,3,7] }, ] }; new Chart(document.getElementById("line").getContext("2d")).Line(lineChartData); 

因此，我想在Labels中度过日子，但是例如，我有这样的数据库：

2016-06-01 | 0 , 2016-06-02 | 10 , ... , 2016-06-07 | 59 , 2016-06-08 | 10

我想要：

select data where month = this month (date(m))

但是我不知道该怎么做？ 而且，我想每个月计算（ * ）：

Month 1 = 1590 visits 
Month 2 = 1589 visits | Month 3 = 200 visits | Month 6 = 1590 visits.

我想算过去三年的结果

2014 = 159200 visits | 2015 = 187951 visits | 2016 = 2000 visits 

我该怎么做？ 我尝试了很多但是有任何结果：'（

Answer 1

您的查询应如下所示：

SELECT sum(likes_field) from your_table group by MONTH(date_field)

对于年度计数，可以使用MySQL的YEAR（date_field）函数。

您可以根据需要添加更多限制（例如限价或定单）。