mysql计算表中每个dupplicate的所有内容

Question

美好的一天，我一直有问题，我不知道为什么我无法计算呢

我有专栏说......

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我希望输出为

colx 
aaa  
aaa
aaa
aaa
bbb
bbb
bbb
bbb
ccc
ccc
eee

Answer 1

您可以使用简单的COUNT和GROUP BY按小组计算。

SELECT colx result, COUNT(1) No_of_Repeats 
FROM table1
GROUP BY colx
ORDER BY COUNT(1) DESC

A simple SQLfiddle to test with

Answer 2

您必须在temp中进行主查询，然后按计数排序。像这样：

$q = "SELECT temp.* FROM (SELECT colx as Result, COUNT(colx) as No_of_Repeats FROM tbl_name GROUP BY colx) as temp ORDER BY temp.No_of_Repeats DESC";

Answer 3

简单查询......

select colx as Result,count(colx) as No_of_Repeats from tbl group by colx order by No_of_Repeats desc;

Answer 4

试试这个

 select colx as result,count(colx) as No_of_Repeats from table1 group by colx;