Select one column value for other columns based on a condition - sql

Question

I have a table like given below structure, I need to write a query to fetch result like achived month comnet retaine for all remaining months from the table based on a condition if the actual value is greater than or equal to target then select that particular month comments value for remaining months too.My table structure is
I am Expecting the result like the below structure.
Here in June actual value is 100 and comment 'Closed' after thet user will not enter anything(Actual or comments) since actual meets target. so i need to display the commment 'Closed' in all remaining months(July-Dec)

Answer 1

Your expected output is not clear, Please add clarity.
How about this? -
SELECT *
FROM YOUR_TABLE
WHERE MONTHS_ID IN (SELECT MONTHS_ID FROM YOUR_TABLE WHERE ACTUAL_VALUE >= TARGET)
Do you want to aggregate comments by Months_ID?
SELECT MONTHS_ID,
LISTAGG(COMMENTS, ',') WITHIN GROUP(ORDER BY COMMENTS) AS COMMENTS
FROM YOUR_TABLE
WHERE MONTHS_ID IN (SELECT MONTHS_ID FROM YOUR_TABLE WHERE ACTUAL_VALUE >= TARGET)
GROUP BY MONTHS_ID

Answer 2

you can use a where based on you filter condition
select a.comment
from your_table_with_commen a
where a.comment is not null
and a.target is not null
and a.target <= a.actual

Answer 3

Your expected output isn't very clear. But if I got it correctly, then you can achieve the desired result using below query(may not be best performing):
with commentValue as (
select month_id, comments from your_table where actual_value = ( select max(target)
from your_table)
)
select yt.target,yt.month_id,
case when yt.month_id >= cv.month_id then cv.comments else yt.comments end as
comments,
yt.actual_value
from your_table yt
join commentValue cv on 1 = 1

Answer 4

From the explanation, seems you need nothing more than this :
Select month, nvl(comment,'Closed') as comment, target, actual
From tableDemands;

Answer 5

I need to write a query to fetch result like achived month comnet retaine for all remaining months from the table based on a condition if the actual value is greater than or equal to target then select that particular month comments value for remaining months too.
SQL Fiddle
Oracle 11g R2 Schema Setup:
CREATE TABLE table_name ( month, "COMMENT", target, actual ) AS
SELECT 1, 'initiated', NULL, 5 FROM DUAL UNION ALL
SELECT 2, 'feb', NULL, 6 FROM DUAL UNION ALL
SELECT 3, 'Mar- On going', NULL, 10 FROM DUAL UNION ALL
SELECT 4, 'Apr- work On going', NULL, 20 FROM DUAL UNION ALL
SELECT 5, 'May- Ongoing', NULL, 50 FROM DUAL UNION ALL
SELECT 6, 'closed', NULL, 100 FROM DUAL UNION ALL
SELECT 7, NULL, NULL, NULL FROM DUAL UNION ALL
SELECT 8, NULL, NULL, NULL FROM DUAL UNION ALL
SELECT 9, NULL, 100, NULL FROM DUAL UNION ALL
SELECT 10, NULL, NULL, NULL FROM DUAL UNION ALL
SELECT 11, NULL, NULL, NULL FROM DUAL UNION ALL
SELECT 12, NULL, NULL, NULL FROM DUAL;
Query 1:
SELECT month,
"COMMENT",
max_target As target,
actual
FROM (
SELECT t.*,
MAX( target ) OVER () AS max_target
FROM table_name t
)
WHERE actual >= max_target
Results:
| MONTH | COMMENT | TARGET | ACTUAL |
|-------|---------|--------|--------|
| 6 | closed | 100 | 100 |

Answer 6

It seems you want to replace a null comment with the last non-null comment. Use LAST_VALUE for this:
select
month,
last_value(comment ignore nulls) over (order by month) as comment,
target,
actual
from mytable
order by month;