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好吧问答库 > oracle里怎么统计某个字段出现的重复次数

oracle里怎么统计某个字段出现的重复次数

2025年03月14日 18:05

有5个网友回答

网友（1）：

可用count函数来计算某个字段重复次数。

如test表中数据如下：

现在要查询name列中，各个名字重复的次数，可用如下语句：

select name,count(*) from test group by name;

查询结果：

网友（2）：

select a.areaid,a.count_100,b.count_200,c.count_400
where 
(select distinct areaid, count(*) count_100 from table where range_=100) a,
(select distinct areaid, count(*) count_200 from table where range_=200) b,
(select distinct areaid, count(*) count_300 from table where range_=300) c
where a.areaid=b.areaid and a.areaid=c.areaid;

网友（3）：

请看下面，当然我是用SQL SERVER来写。但是在ORACLE能通用。

select B.ID,

case when B.h IS null then 0 else B.h end as h,

case when B.t IS null then 0 else B.t end as t,

case when B.g IS null then 0 else B.g end as g from (

SELECT distinct ID,

(select [COUNT] from 表 where ID=a.id and RA=100) as h,

(select [COUNT] from 表 where ID=a.id and RA=200) as t,

(select [COUNT] from 表 where ID=a.id and RA=300) as g

from 表 A

) B

网友（4）：

select AREA_ID,sum(NVL(decode(RANGE_,100,count_),0)) as COUNT_100,
sum(NVL(decode(RANGE_,200,count_),0)) as COUNT_200,
sum(NVL(decode(RANGE_,300,count_),0)) as COUNT_300 from test1 group by area_id

网友（5）：

where条件上加个那个字段，然后用sum求和

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