在PHP mySQL中计算表记录值并将计数值分配为变量

Question

我有一个数据库，其中包含州名，区，城市，区域大小等区域详细信息......

现在我想从州名中计算一个区域值，并将该值分配给某个变量以显示html页面。

Example: The tamil nadu state includes total of 30 districts. 

查询状态列表，

$qry = "SELECT DISTINCT state_Name FROM area_info ORDER BY state_Name";

怎么做...有人请帮助我..

Answer 1

尝试此查询：

SELECT count(district) 
FROM area_info 
GROUP BY state_Name

Answer 2

试试这个

$qry = "SELECT DISTINCT state_Name, COUNT(*) AS district  FROM area_info Group BY state_Name" ;

Answer 3

要获取记录的计数，您可以使用以下查询

echo "The tamil nadu state includes total of $totaldist districts.";

然后分配这个变量你可以这样写：

{{1}}

Answer 4

您应该尝试这一点，肯定会解决您的疑问。

$qry = "SELECT state_name, COUNT(district) As TotalData FROM area_info GROUP BY state_name";

Answer 5

列出州名及其中的地区数量：

SELECT state_Name, COUNT(district)
FROM area_info
GROUP BY state_Name;