How can I aggregate two classes of values in a SQL query?
-
05-07-2019 - |
Question
I have a table that contains intervals:
CREATE TABLE tbl (
user_id: INTEGER,
start: TIMESTAMP,
end: TIMESTAMP,
billable: BOOLEAN
);
I want to create a view that looks like this:
user_id | billable_time | unbillable_time
I can get one of these two using a query like this:
SELECT user_id, sum(end - start) AS billable_time WHERE billable = TRUE GROUP BY user_id;
However, I need both columns, with unbillable time being the equivalent:
SELECT user_id, sum(end - start) AS unbillable_time WHERE billable = FALSE GROUP BY user_id;
How can I get those two values into one query?
Solution
select user_id, sum(case billable when 1 then (end - start) end) as can_bill,
sum(case billable when 0 then (end - start) end) as unbillable
OTHER TIPS
SELECT user_id, billable, sum(end - start) AS billable_time
GROUP BY user_id,billable;
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