Question

我正在尝试使用MYSql语句来吐出字段中最常见的数字。我相信我应该使用COUNT(QUANTITY)，但我对GROUP BY和ORDER BY感到困惑，我似乎无法获得正确的模式（最常见的数字）。

*的修改 *

以下是一个示例表：

QUANTITY | ORDER_NUMBER
   1         51541
   4         12351
   5         11361
   5         12356
   6         12565
   8         51424
   10        51445
   25        51485

MYSql语句应该吐出数字 5 ，因为它最常出现

Answer 1

SELECT QUANTITY,COUNT(*)
FROM ...
GROUP BY 1
ORDER BY 2 DESC
LIMIT 1;

Answer 2

SELECT ORDER_NUMBER AS ORDER, COUNT(QUANTITY) as numorders
FROM table 
GROUP BY ORDER_NUMBER
ORDER BY numorders

Answer 3

获得前10名order_number做

select order_number, count(order_number) as quantity
from your_table
group by order_number
order by quantity desc
limit 10

Answer 4

SELECT QUANTITY, COUNT(QUANTITY) AS TOTAL_Q
 FROM MYTABLE
 GROUP BY QUANTITY
 ORDER BY TOTAL_Q DESC

这将为您提供从最多到最少数量的数量......

MYSQL SELECT语句中最常见的数字

4 个答案: