Question

I’m using SQLite.

I have a simple table

id  flag     
1   y   
2   y   
1   n   
2   y   
3   n   

I need to create a query that should give the number of flagged rows

id No
1  1
2  2
3  0

if I use

    SELECT  Table1.ID as ID, Count(Table1.id) AS No
    FROM Table1
    WHERE (((Table1.[flag])=True))
    GROUP BY ID;

the GROUP BY will ignore the id=3.

What can I do?

Answer 1

You are almost there: instead of COUNT, use SUM, and move your where clause inside it as a condition.

This should work:

SELECT  Table1.ID as ID, SUM(case when (Table1.[flag])=True then 1 else 0 end) AS No
FROM Table1
GROUP BY ID;