SQLite: accumulator (sum) column in a SELECT statement

Question

I have a table like this one:

SELECT value FROM table;

value
1
3
13
1
5

I would like to add an accumul

Answer 1

Here's a method to create a running total without the inefficiency of summing all prior rows. (I know this question is 6 years old but it's one of the first google entries for sqlite running total.)

create table t1 (value integer, accumulated integer, id integer primary key);
insert into t1 (value) values (1);
insert into t1 (value) values (3);
insert into t1 (value) values (13);
insert into t1 (value) values (1);
insert into t1 (value) values (5);

UPDATE
    t1
SET
    accumulated = ifnull(
    (
        SELECT
            ifnull(accumulated,0)
        FROM
            t1 ROWPRIOR
        WHERE
            ROWPRIOR.id = (t1.id -1 )),0) + value;


.headers on
select * from t1;
value|accumulated|id
1|1|1
3|4|2
13|17|3
1|18|4
5|23|5

This should only be run once after importing all the values. Or, set the accumulated column to all nulls before running again.