Question

I have a simple table structure where each item row has a status. What I’m looking is to query for each status and count how many items use that state. It’s possible that not all statuses will be used so I need to account for nulls and zero counts.

My table structures is as follows:

Table: Items
Id, State_id, Text, Status

Table: States
State_id, Name

This is what I have:

SELECT   statealias1_.State_id as y0_,
         count(this_.Id)       as y1_
FROM     Items this_
         right join States statealias1_
           on this_.State_id = statealias1_.State_id
WHERE    (not (statealias1_.State_id in (5, 6, 7, 8)) 
            or statealias1_.State_id is null)
         and (this_.Status = 'InProgress' 
            or this_.Status is null)
GROUP BY statealias1_.State_id;

This query works when all states included (there are 8 states and I’m excluding the second half). I’m not sure why this isn’t returning me all states with count regardless of nulls as I appear to be including nulls.

Answer 1

select i.State_id as y0_, count(i.Id) as y1_
from Items i
left join States s on i.State_id = s.State_Id and i.Status = 'InProgress'
group by i.State_id