Sql server 2008 各列的计数值

我有一张桌子

school code   school_name subcode1 subcode2 subcode3 
001               xyz      56        55     54
002               abc      55        56     54
003               xyz      54        55     56

假设56=英语或55=印地语，我想检查xyz学校有多少英语科目或多少印地语科目等

我在以下情况下使用了

count（*）

函数：

select count(*) 
from schooltable 
where (subcode1 = '55' or subcode2 = '55' or subcode3 = 55) 
  and school_name='abc' 

但它只给出了一个结果，我想得到所有学校的所有记录，然后像这样插入

scode schoolname sub   sub    sub
                 eng  hindi  history
001     abc      3      2      3

select sum(case when subcode1='55' or subcode2='55' or subcode3=55 then 1 else 0 end) as hindi,
       sum(case when subcode1='56' or subcode2='56' or subcode3=56 then 1 else 0 end) as english
from schooltable 
--where school_name='abc'    (not sure if you really require this constraint, although you have it in your question)

---

需要帮助。

您可以进行条件求和，类似这样的操作

scode schoolname sub   sub    sub
                 eng  hindi  history
001     abc      3      2      3

select sum(case when subcode1='55' or subcode2='55' or subcode3=55 then 1 else 0 end) as hindi,
       sum(case when subcode1='56' or subcode2='56' or subcode3=56 then 1 else 0 end) as english
from schooltable 
--where school_name='abc'    (not sure if you really require this constraint, although you have it in your question)

如果需要，您可以添加一个GROUPBY子句，但这取决于您的确切需求、数据库结构、主键等。但以上内容至少可以让您开始学习。

试试这个

select school_name,count(*) as TotalSub from schooltable
  group by school_name, subcode1,subcode2,subcode3
  having school_name = 'abc'

---

“school code”是主键吗？你想在“school_name”上分组吗？我想OP想要的是按学校名称分组。OP也有where子句。没有WHERE子句或GROUPBY看起来更有意义，但这是OP在他的问题中所做的。我相信他主要对条件和部分感兴趣。