Use temporary table in query

Question

Table contains multiple columns and multiple redundant rows which I don't need to work on. Let's say I selected columns and rows which I need to work on.

select column1, 
       column2, 
       column3 
from table 
where column1 > something 
and column2 == something;

Now how do I perform nested query on that selected data? I was thinking of doing something like.

 select column1, 
        sum(column2) from (
                           select column1, 
                                  column2, 
                                  column3 
                           from table 
                           where column1>something 
                           and column2 == something) 
group by column1;

And I am getting error. Any help would be appreciated

Answer 1

I don't know if you really need the subquery or the column3 that you don't use in any condition, if you provide template datas and expected result would be better.

For your query to work you need an alias in the subquery, so it would be something like:

select t1.column1, 
        sum(t1.column2) from (
                           select column1, 
                                  column2, 
                                  column3 
                           from table 
                           where column1>something 
                           and column2 == something) as t1
group by t1.column1;