Question

Imagine I have a column of a table like this:

b
-
1
1
1
2
3

and I want to obtain

a | b
-----
1 | 3
2 | 1
3 | 1

representing the ocurrencies for that row. I have read that this would do the job:

select b, count(b) from table group by b

how ever, the result I get is just this:

3 | 5

What’s wrong?

Answer 1

As mentioned the SQL appears fine. I ran a quick test here with the following:

create table #temp
(num int)

insert #temp
select 1 union all
select 1 union all
select 1 union all
select 2 union all
select 3 

select Num, COUNT(num) as Occurances from #temp group by num

drop table #temp

This gives the below result set:

Num Occurances
1       3
2       1
3       1

Compare the above to your whole code, including the table creation etc.