Question

我需要从许多表中生成一些关于过滤器的大数据，在那里我还需要获得一些列的总和，以及像行一样的行数

我有5条记录

ID | NAME | DELETED

1 | A | 1
2 | A | 0
3 | A | 1
4 | B | 1
5 | C | 1个

我有查询，

SELECT  p.name, sum(p.deleted) as del, count(p.id) as numbers from products as p
join other AS b ON p.id=b.id

我需要的输出是，

The sum of deleted records

NAME |删除|计数

A | 2 | 3
B | 1 | 1
C | 1 | 1个

Answer 1

试试这个::

SELECT  
p.name, 
sum(p.deleted) as del, 
count(id)  as numbers
from products as p
join other AS b ON p.id=b.id 
group by p.name

Answer 2

您不需要加入即可获得结果。这应该有效：

SELECT name, sum(deleted), count(1)
FROM products
GROUP BY name

Answer 3

SELECT  name,
        SUM(CASE WHEN deleted = 1 THEN 1 ELSE 0 END) Deletion,
        COUNT(*) `COunt`
FROM    products 
GROUP BY name

OR

SELECT  name,
        SUM(deleted) Deletion,
        COUNT(*) `COunt`
FROM    products 
GROUP BY name;