Return running max column from another column SQL
I have a query where I would like to manipulate a column to return an array conatining only the max-value from the last 12 values from another column (due to other parts of the query).
Example:
I want to add the column MaxLast12 from:
Month Power
1 10
2 16
3 8
4 14
5 15
6 3
7 6
8 10
9 11
10 12
11 12
12 12
13 18
14 12
To become:
Month Power MaxLast12
1 10 10
2 16 16
3 8 16
4 14 16
5 15 16
6 3 16
7 6 16
8 17 17
9 11 17
10 12 17
11 12 17
12 12 17
13 18 18
14 12 18
It would also help to be able to create a simpler solution where I only include the 12 rows in the query (won't be as accurate but good enough for the purpose) with only the maximum value. Would need to do the following:
Month Power
1 6
2 6
3 8
4 14
5 15
6 3
7 6
8 10
9 11
10 12
11 12
12 12
To become:
Month Power YearMax
1 10 17
2 16 17
3 8 17
4 14 17
5 15 17
6 3 17
7 6 17
8 17 17
9 11 17
10 12 17
11 12 17
12 12 17
Since I'm guessing both problems solution will be similar, any help possible is appriciated. Would like to avoid usign GROUP BY clause since I'm modifying an existing kind of complex query.
Tried to achive this using max() with no luck.
I am using SQL-developer.
sql oracle window-functions
edited Nov 21 '18 at 16:07
a_horse_with_no_name
292k46446541
asked Nov 21 '18 at 15:40
Flyckten
41117
add a comment |
I have a query where I would like to manipulate a column to return an array conatining only the max-value from the last 12 values from another column (due to other parts of the query).
Example:
I want to add the column MaxLast12 from:
Month Power
1 10
2 16
3 8
4 14
5 15
6 3
7 6
8 10
9 11
10 12
11 12
12 12
13 18
14 12
To become:
Month Power MaxLast12
1 10 10
2 16 16
3 8 16
4 14 16
5 15 16
6 3 16
7 6 16
8 17 17
9 11 17
10 12 17
11 12 17
12 12 17
13 18 18
14 12 18
It would also help to be able to create a simpler solution where I only include the 12 rows in the query (won't be as accurate but good enough for the purpose) with only the maximum value. Would need to do the following:
Month Power
1 6
2 6
3 8
4 14
5 15
6 3
7 6
8 10
9 11
10 12
11 12
12 12
To become:
Month Power YearMax
1 10 17
2 16 17
3 8 17
4 14 17
5 15 17
6 3 17
7 6 17
8 17 17
9 11 17
10 12 17
11 12 17
12 12 17
Since I'm guessing both problems solution will be similar, any help possible is appriciated. Would like to avoid usign GROUP BY clause since I'm modifying an existing kind of complex query.
Tried to achive this using max() with no luck.
I am using SQL-developer.
sql oracle window-functions
edited Nov 21 '18 at 16:07
a_horse_with_no_name
292k46446541
asked Nov 21 '18 at 15:40
Flyckten
41117
2
Please tag theDBMSwhich you are really using.
– Yogesh Sharma
Nov 21 '18 at 15:42
Thanks, forgot that one.
– Flyckten
Nov 21 '18 at 16:04
add a comment |
I have a query where I would like to manipulate a column to return an array conatining only the max-value from the last 12 values from another column (due to other parts of the query).
Example:
I want to add the column MaxLast12 from:
Month Power
1 10
2 16
3 8
4 14
5 15
6 3
7 6
8 10
9 11
10 12
11 12
12 12
13 18
14 12
To become:
Month Power MaxLast12
1 10 10
2 16 16
3 8 16
4 14 16
5 15 16
6 3 16
7 6 16
8 17 17
9 11 17
10 12 17
11 12 17
12 12 17
13 18 18
14 12 18
It would also help to be able to create a simpler solution where I only include the 12 rows in the query (won't be as accurate but good enough for the purpose) with only the maximum value. Would need to do the following:
Month Power
1 6
2 6
3 8
4 14
5 15
6 3
7 6
8 10
9 11
10 12
11 12
12 12
To become:
Month Power YearMax
1 10 17
2 16 17
3 8 17
4 14 17
5 15 17
6 3 17
7 6 17
8 17 17
9 11 17
10 12 17
11 12 17
12 12 17
Since I'm guessing both problems solution will be similar, any help possible is appriciated. Would like to avoid usign GROUP BY clause since I'm modifying an existing kind of complex query.
Tried to achive this using max() with no luck.
I am using SQL-developer.
sql oracle window-functions
edited Nov 21 '18 at 16:07
a_horse_with_no_name
292k46446541
asked Nov 21 '18 at 15:40
Flyckten
41117
I have a query where I would like to manipulate a column to return an array conatining only the max-value from the last 12 values from another column (due to other parts of the query).
Example:
I want to add the column MaxLast12 from:
Month Power
1 10
2 16
3 8
4 14
5 15
6 3
7 6
8 10
9 11
10 12
11 12
12 12
13 18
14 12
To become:
Month Power MaxLast12
1 10 10
2 16 16
3 8 16
4 14 16
5 15 16
6 3 16
7 6 16
8 17 17
9 11 17
10 12 17
11 12 17
12 12 17
13 18 18
14 12 18
It would also help to be able to create a simpler solution where I only include the 12 rows in the query (won't be as accurate but good enough for the purpose) with only the maximum value. Would need to do the following:
Month Power
1 6
2 6
3 8
4 14
5 15
6 3
7 6
8 10
9 11
10 12
11 12
12 12
To become:
Month Power YearMax
1 10 17
2 16 17
3 8 17
4 14 17
5 15 17
6 3 17
7 6 17
8 17 17
9 11 17
10 12 17
11 12 17
12 12 17
Since I'm guessing both problems solution will be similar, any help possible is appriciated. Would like to avoid usign GROUP BY clause since I'm modifying an existing kind of complex query.
Tried to achive this using max() with no luck.
I am using SQL-developer.
sql oracle window-functions
sql oracle window-functions
edited Nov 21 '18 at 16:07
a_horse_with_no_name
292k46446541
asked Nov 21 '18 at 15:40
Flyckten
41117
edited Nov 21 '18 at 16:07
a_horse_with_no_name
292k46446541
asked Nov 21 '18 at 15:40
Flyckten
41117
edited Nov 21 '18 at 16:07
a_horse_with_no_name
292k46446541
edited Nov 21 '18 at 16:07
a_horse_with_no_name
292k46446541
edited Nov 21 '18 at 16:07
a_horse_with_no_name
292k46446541
292k46446541
asked Nov 21 '18 at 15:40
Flyckten
41117
asked Nov 21 '18 at 15:40
Flyckten
41117
asked Nov 21 '18 at 15:40
Flyckten
41117
41117
2
Please tag theDBMSwhich you are really using.
– Yogesh Sharma
Nov 21 '18 at 15:42
Thanks, forgot that one.
– Flyckten
Nov 21 '18 at 16:04
add a comment |
2
Please tag theDBMSwhich you are really using.
– Yogesh Sharma
Nov 21 '18 at 15:42
Thanks, forgot that one.
– Flyckten
Nov 21 '18 at 16:04
2
2
Please tag the
DBMS which you are really using.– Yogesh Sharma
Nov 21 '18 at 15:42
Please tag the
DBMS which you are really using.– Yogesh Sharma
Nov 21 '18 at 15:42
Thanks, forgot that one.
– Flyckten
Nov 21 '18 at 16:04
Thanks, forgot that one.
– Flyckten
Nov 21 '18 at 16:04
add a comment |
1 Answer
1
active
oldest
votes
In Oracle you would use window functions:
select month, power,
max(power) over (order by month rows between 11 preceding and current row)
from t;
answered Nov 21 '18 at 15:41
Gordon Linoff
759k35293399
These type of functions will help me a bunch, thanks for a great and fast answer!
– Flyckten
Nov 21 '18 at 16:17
add a comment |
Your Answer
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1 Answer
1
active
oldest
votes
1 Answer
1
active
oldest
votes
active
oldest
votes
active
oldest
votes
In Oracle you would use window functions:
select month, power,
max(power) over (order by month rows between 11 preceding and current row)
from t;
answered Nov 21 '18 at 15:41
Gordon Linoff
759k35293399
These type of functions will help me a bunch, thanks for a great and fast answer!
– Flyckten
Nov 21 '18 at 16:17
add a comment |
In Oracle you would use window functions:
select month, power,
max(power) over (order by month rows between 11 preceding and current row)
from t;
answered Nov 21 '18 at 15:41
Gordon Linoff
759k35293399
These type of functions will help me a bunch, thanks for a great and fast answer!
– Flyckten
Nov 21 '18 at 16:17
add a comment |
In Oracle you would use window functions:
select month, power,
max(power) over (order by month rows between 11 preceding and current row)
from t;
answered Nov 21 '18 at 15:41
Gordon Linoff
759k35293399
In Oracle you would use window functions:
select month, power,
max(power) over (order by month rows between 11 preceding and current row)
from t;
answered Nov 21 '18 at 15:41
Gordon Linoff
759k35293399
answered Nov 21 '18 at 15:41
Gordon Linoff
759k35293399
answered Nov 21 '18 at 15:41
Gordon Linoff
759k35293399
answered Nov 21 '18 at 15:41
Gordon Linoff
759k35293399
759k35293399
These type of functions will help me a bunch, thanks for a great and fast answer!
– Flyckten
Nov 21 '18 at 16:17
add a comment |
These type of functions will help me a bunch, thanks for a great and fast answer!
– Flyckten
Nov 21 '18 at 16:17
These type of functions will help me a bunch, thanks for a great and fast answer!
– Flyckten
Nov 21 '18 at 16:17
These type of functions will help me a bunch, thanks for a great and fast answer!
– Flyckten
Nov 21 '18 at 16:17
add a comment |
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2
Please tag the
DBMSwhich you are really using.– Yogesh Sharma
Nov 21 '18 at 15:42
Thanks, forgot that one.
– Flyckten
Nov 21 '18 at 16:04