我有一个非常简单的表:

CREATE TABLE "Score"(
"Id" varchar primary key not null ,
"EnglishCount" int ,
"RomajiCount" int )


有没有一种我可以运行的查询,它将显示给我:

   how many rows have EnglishCount = 0,
   how many rows have EnglishCount = 1,
   how many rows have EnglishCount = 2,
   how many rows have EnglishCount = 3,
   how many rows have EnglishCount = 4,
   etc ...


这是我希望获得的输出:

Count    Instances
0        1
1        2
3        1
4        5
5        2

最佳答案

您可以使用group by子句按EnglishCount的不同值分隔结果,然后将count(*)应用于每个组:

SELECT   EnglishCount, COUNT(*)
FROM     Score
GROUP BY EnglishCount

关于sql - 是否可以使用某种组查询对列中的数字进行分组?,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/40190985/

10-11 10:46