Sql 从两个具有多个计数的表中进行选择

我有两个表正试图加入select查询

表1：存储，主键（id，存储编号）

表2：部门，状态（A-已申请，p-待决）

应选择门店id、门店编号、截止日期、经理id、已应用计数、待处理计数。结果是这样的

store_id  store_num     due_date     manager_id  applied_count    pending_count
    1       100        06-30-2024      user1          4               2

我尝试了它，并得到了我可以加入，并得到它在多行，但计数不适合我。有人能帮我查一下计数吗

select 
   store.store_id, 
   store.store_num, 
   store.due_date, 
   store.manager_id, 
   dept.status 
from store as store 
inner join department as dept on store.store_id = dept.store_id
                             and store.store_num = dept.store_num

---

你的查询完成了一半。您需要进行聚合以获取不同列中的值。这是一个条件聚合，如下所示：

select s.store_id, s.store_num, s.due_date, s.manager_id,
       sum(case when d.status = 'A' then 1 else 0 end) as Active_Count,
       sum(case when d.status = 'P' then 1 else 0 end) as Pending_Count
from store s inner join
     department as dept
     on s.store_id = d.store_id and s.store_num = d.store_num
group by store.store_id, store.store_num, store.due_date, store.manager_id;

表达方式：

       sum(case when d.status = 'A' then 1 else 0 end) as Active_Count,

正在计算

状态为'A'

的行数。它通过为这些行指定一个

1

值，然后对该值求和来实现

select s.store_id, s.store_num, s.due_date, s.manager_id,
       sum(case when d.status = 'A' then 1 else 0 end) as Active_Count,
       sum(case when d.status = 'P' then 1 else 0 end) as Pending_Count
from store s inner join
     department as dept
     on s.store_id = d.store_id and s.store_num = d.store_num
group by store.store_id, store.store_num, store.due_date, store.manager_id;

       sum(case when d.status = 'A' then 1 else 0 end) as Active_Count,