sql-server , Count all rows from a column, and get 2 different count columns on the result even if there are not records to count
Count all rows from a column, and get 2 different count columns on the result even if there are not records to count
What I want to do is to count all rows from a column
State, and get 2 different count columns on the result (one for each possible value 1 or 0).
The thing is that I need to show on the results 0 even if there are not records to count.
For example I have this table
subcategory with this sample data:
SubcategoryID | Name |
201 | Name1 |
202 | Name2 |
203 | Name3 |
204 | Name4 |
And I have this table
product with this sample data:
ProductID |Subcategory| State |
101 | 201 | 1 |
102 | 201 | 1 |
103 | 201 | 1 |
104 | 202 | 0 |
105 | 202 | 0 |
106 | 203 | 1 |
107 | 203 | 0 |
108 | 203 | 0 |
State: 1 = Active, 0 = Inactive
So I want to get this:
| 201 | 3 | 0 |
| 202 | 0 | 2 |
| 203 | 1 | 2 |
| 204 | 0 | 0 |*
Please note that there are not products related to SubcategoryId = 204 on product table.
I'm using this query to get only the products that are related to one subcategory. Do you know what I have to add to get the line "|204|0|0|" ?
sum(case when state = 1 then 1 else 0 end) as active,
sum(case when state = 0 then 1 else 0 end) as inactive
from product p
group by p.subcategory
Left Join to get all the rows from
subcategory table and then do the
Sum(CASE WHEN state = 1 THEN 1 ELSE 0 END) AS active,
Sum(CASE WHEN state = 0 THEN 1 ELSE 0 END) AS inactive
FROM subcategory s
LEFT JOIN product p
ON s.SubcategoryID = p.Subcategory
GROUP BY s.subcategoryID
Count, case statement
else part can be avoided
count(CASE WHEN state = 1 THEN 1 END) AS active,
count(CASE WHEN state = 0 THEN 1 END) AS inactive
FROM subcategory s
LEFT JOIN product p
ON s.SubcategoryID = p.Subcategory
GROUP BY s.subcategoryID
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