I ask if the nested houses are used as follows:
SELECT
CASE
WHEN Col1 < 2 THEN
CASE Col2
WHEN 'X' THEN 10
ELSE 11
END
WHEN Col1 = 2 THEN 2
.....
ELSE 0
END as Qty,
......,
FROM ....
explanation: If Col1 <2 shows something, but that something if X gives me the value 10 otherwise 11 If Col1 = 2 shows 2 otherwise 0 everything in the column name Qty
Is the reasoning correct?
Thanks in advance
It's should return what you say you need, but it's easier to read this way:
SELECT
CASE
WHEN Col1 < 2 AND Col2 = 'X' THEN 10
WHEN Col1 < 2 THEN 11
WHEN Col1 = 2 THEN 2
--.....
ELSE 0
END AS Qty
FROM
-- ...
Related
I have a sql problem (on Redshift) where I need to get the value from column index for each id in column id based on max value in column final_score and put this value in a new column fav_index. score2 equals to the value of score1 where index n = index n + 1, for example, for id = abc1, index = 0 and score1 = 10 the value of score2 will be the value of score1 where index = 1 and the value of final_score is the difference between score1 and score2.
It's easier if you look at below table score. This table score is a result of a sql query which is shown later below.
id index score1 score2 final_score
abc1 0 10 20 10
abc1 1 20 45 25
abc1 2 45 (null) (null)
abc2 0 5 10 5
abc2 1 10 (null) (null)
abc3 0 50 30 -20
abc3 1 30 (null) (null)
So, the resulting table containing column fav_index should look like this:
id index score1 score2 final_score fav_index
abc1 0 10 20 10 0
abc1 1 20 45 25 1
abc1 2 45 (null) (null) 0
abc2 0 5 10 5 0
abc2 1 10 (null) (null) 0
abc3 0 50 30 -20 0
abc3 1 30 (null) (null) 0
Below is the script to generate table score from table story:
select
m.id,
m.index,
max(m.max) as score1,
fmt.score2,
round(fmt.score2 - max(m.max), 1) as final_score
from
(select
sv.id,
case when sv.story_number % 2 = 0 then cast(sv.story_number / 2 - 1 as int) else cast(floor(sv.story_number/2) as int) end as index,
max(sv.score1)
from
story as sv
group by
sv.id,
index,
sv.score1
order by
sv.id,
index
) as m
left join
(select
sv.id,
case when sv.story_number % 2 = 0 then cast(sv.story_number / 2 - 1 as int) else cast(floor(sv.story_number/2) as int) end as index,
max(score1) as score2
from
story as sv
group by
id,
index
) as fmt
on
m.id = fmt.id
and
m.index = fmt.index - 1
group by
m.id,
m.index,
fmt.score2
Table story is as below:
id story_number score1
abc1 1 10
abc1 2 10
abc1 3 20
abc1 4 20
abc1 5 45
abc1 6 45
The only solution I can think of is to do something like,
select id, max(final_score) from score group by id
and then join it back to the long script above (which was used to generate table score). I really want to avoid writing such a long script to get just 1 extra column of information that I need.
Is there a better way to do this?
Thank you!
Update: answer in mysql is also accepted. thanks!
After spending more hours on this and asking people around, I finally figured out a solution by referring to this window function documentation - PostgreSQL https://www.postgresql.org/docs/9.1/static/tutorial-window.html
I basically added 2 x select statements at the top and 1 x where statement at the very bottom. The where statement is to take care of the rows where final_score = null because otherwise the rank() function will rank them as 1.
My code then becomes:
select
id, index, final_score, rank, case when rank = 1 then index else null end as fav_index
from
(select
id, index, final_score, rank() over (partition by id order by final_score desc)
from
(select
m.id,
m.index,
max(m.max) as score1,
fmt.score2,
round(fmt.score2 - max(m.max), 1) as final_score
from
(select
sv.id,
case when sv.story_number % 2 = 0 then cast(sv.story_number / 2 - 1 as int) else cast(floor(sv.story_number/2) as int) end as index,
max(sv.score1)
from
story as sv
group by
sv.id,
index,
sv.score1
order by
sv.id,
index
) as m
left join
(select
sv.id,
case when sv.story_number % 2 = 0 then cast(sv.story_number / 2 - 1 as int) else cast(floor(sv.story_number/2) as int) end as index,
max(score1) as score2
from
story as sv
group by
id,
index
) as fmt
on
m.id = fmt.id
and
m.index = fmt.index - 1
group by
m.id,
m.index,
fmt.score2)
where
final_score is not null)
And the result is as follows:
id index final_score rank fav_index
abc1 0 10 2 (null)
abc1 1 25 1 1
abc2 0 5 1 0
abc3 0 -20 1 0
Result is slightly different than what I stated in the question, however, the fav_index for each id is identified and this is what I needed really. Hope this might help someone. Cheers
I have the following query:
SELECT case
when tbl.id % 2 = 0 then 'mod-2'
when tbl.id % 3 = 0 then 'mod-3'
when tbl.id % 5 = 0 then 'mod-5'
else 'mod-x'
end as odds, tbl.id from some_xyz_table tbl;
If the table has Id 5,6,7 then it is returning output as (copied from pg-admin):
"mod-5";5
"mod-2";6
"mod-x";7
But, here I can see 6 is divisible by both 2 and 3. And my expected output is:
"mod-5";5
"mod-2";6
"mod-3";6 <-- this
"mod-x";7
Is there any way to modify this query to obtain such output? Any alternate solution will do for me.
You could do this with UNION queries [EDIT changed it to use UNION ALL]:
SELECT 'mod-5', id FROM tbl -- divisible by 5
WHERE id %5 = 0
UNION ALL
SELECT 'mod-2', id FROM tbl -- divisible by 2
WHERE id %2 = 0
UNION ALL
SELECT 'mod-3', id FROM tbl -- divisible by 3
WHERE id %3 = 0
UNION ALL
SELECT 'mod-x',id FROM tbl -- not divisible by 5,3 or 2
WHERE id %5 <> 0 AND id%2 <> 0 AND id % 3 <> 0
Can any one of you please help me out with the below condition in sybase update?
Table A
ID COL1 COL1_AMT COL2 COL2_AMT COL3 COL3_AMT COL4 COL4_AMT
1 10 100.00 16 50.00 17 80.00 21 90.00
Table B
ID FIN_AMT
1 20
Whenever COL1 or COL2 or COL3 or COL4 equals value as '17' then the corresponding amount column COL1_AMT or COL2_AMT or COL3_AMT or COL4_AMT value should be picked from Table A and get updated in Table B FIN_AMT clumn
Here COL3 is 17, so COL3_AMT value 80 should be added in Table B FIN_AMT
Expected Result in Table B
ID FIN_AMT
1 100 (Already 20 is there, so 80 should be added to this)
Thanks in advance
I can't test on SYBASE, and it's been years, so have mercy on the finer details of the syntax ;)
Something like this ought to do it;
UPDATE TableB
SET TableB.FIN_AMT = TableB.FIN_AMT +
CASE WHEN TableA.COL1 = 17 THEN TableA.COL1_AMT ELSE 0 END +
CASE WHEN TableA.COL2 = 17 THEN TableA.COL2_AMT ELSE 0 END +
CASE WHEN TableA.COL3 = 17 THEN TableA.COL3_AMT ELSE 0 END +
CASE WHEN TableA.COL4 = 17 THEN TableA.COL4_AMT ELSE 0 END
FROM TableB, TableA
WHERE TableB.ID = TableA.ID
I have a table, TableA, that looks like this:
ColA ColB
0 20
1 10
0 5
1 15
I want to sort the rows so that all the records where ColA = 0 are listed first, and then these records are sorted by ColB ascendingly. After all the rows with ColA = 0 are listed, I then want to list all the rows with ColA = 1 but these rows sorted by ColB descendingly.
The results should look like this:
ColA ColB
0 5
0 20
1 15
1 10
Is this possible? Thanks for your help.
select t.ColA, t.ColB
from t
order by t.ColA
,case when t.ColA = 0 then t.ColB end asc
,case when t.ColA = 1 then t.ColB end desc
SELECT ColA,ColB
FROM table
ORDER BY
ColA, (CASE WHEN ColA = 1 THEN -1 * ColB ELSE ColB END)
Suppose I have a table like below
ID Marks1 Marks2 Marks3
-------------------------
1 10 0 4
2 0 40 90
Now, I need to select from this table in a way that will give precedence to positive values first. So if the marks are 0 then it will be shifted to right. The SELECT should give following output
ID Marks1 Marks2 Marks3
-------------------------
1 10 4 0
2 40 90 0
Can you please guide me for the approach? It will be great if it can be done in a select statement itself. Thanks in advance.
Something like this you will need to check for each subsequent row that the previous column isn't 0. Have selected the values out as null as it makes the code slightly easier to read as i can use coalesce
Select
Coalesce(Marks1, Marks2, Marks3,0) as Marks1,
Case when marks1 is not null
then Coalesce(Marks2, Marks3, 0) else 0
end as Marks2,
case when marks1 is not null
and marks2 is not null
then Coalesce(Marks3,0)
end as Marks3
from
(
Select
Case when Marks1 =0 then null else Marks1 end as Marks1,
Case when Marks2 =0 then null else Marks2 end as Marks2,
Case when Marks3 =0 then null else Marks3 end as Marks3
From mytbl
)