I am attempting to write an sql query for Postgresql that looks through a table of descriptions for a subject and another table that keeps tally of how many likes or dislikes or other flags are attached to the description. I want it to go through the tally table, find all the flags attached to each description, find the sum of how many identical flags there are for each description, then order by the number of likes each flag has minus how many dislikes etc it has, then return a list of all descriptions ordered by the sum of the previously described equation ( likes - dislikes etc.) and the number of likes, dislikes, etc. this is an example of the code I have so far ( there are more variables in the likes/dislikes as variable section ):
SELECT likes, dislikes, positive - negative AS orderCondition
FROM( SELECT d.id, d.l_id, d.user_id, d.description, a.flaggee_id,
SUM( CASE WHEN a.actions_id = 1 THEN 1 WHEN actions_id = 6 THEN 1 ELSE 0 END ) AS positive,
SUM( CASE WHEN a.actions_id <> 1 THEN 1 WHEN a.actions_id <> 6 THEN 1 ELSE 0 END ) AS negative,
SUM( CASE WHEN a.actions_id = 1 THEN 1 ELSE 0 END ) AS likes,
SUM( CASE WHEN a.actions_id = 2 THEN 1 ELSE 0 END ) AS dislikes
FROM descriptions d, description_actions a
WHERE d.id = a.flaggee_id OR d.id > 0 AND d.id <> a.flaggee_id
GROUP BY d.id, a.flaggee_id ) as result
ORDER BY orderCondition DESC;
this is not working however, it returns an empty set without errors. data in the tables are random for testing, id's are integers, things that are not id's are random strings, when querying the tables individually the results are accurate, so its not a case of the data not being in the tables. I'm having a really difficult time figuring it out.. any help would be appreciated.
I figured it out, I needed to specify that it was a left join, in order to still display results if the flags table was empty, I also added variables to the outer select. here is the working query
SELECT description, likes, dislikes, positive - negative AS orderCondition
FROM( SELECT d.id, d.l_id, d.user_id, d.description AS description, a.flaggee_id,
SUM( CASE WHEN a.actions_id = 1 THEN 1 WHEN actions_id = 6 THEN 1 ELSE 0 END ) AS positive,
SUM( CASE WHEN a.actions_id <> 1 THEN 1 WHEN a.actions_id <> 6 THEN 1 ELSE 0 END ) AS negative,
SUM( CASE WHEN a.actions_id = 1 THEN 1 ELSE 0 END ) AS likes,
SUM( CASE WHEN a.actions_id = 2 THEN 1 ELSE 0 END ) AS dislikes
FROM descriptions d LEFT JOIN description_actions a ON a.flaggee_id = d.id
GROUP BY d.id, a.flaggee_id ) as result
ORDER BY orderCondition DESC;
Related
TSQL - SQL Sever
I'm building a report to very specific requirements. I'm trying to combine multiples of a key ID into single rows, but there's different values in some of the columns, so GROUP BY won't work.
SELECT count(tt.Person_ID) as CandCount, tt.Person_ID,
CASE e.EthnicSuperCategoryID WHEN CandCount > 1 THEN 10 ELSE e.EthnicSuperCategoryID END as EthnicSuperCategoryID,
CASE e.Ethnicity_Id WHEN 1 THEN 1 ELSE 0 END as Black ,
CASE e.Ethnicity_Id WHEN 2 THEN 1 ELSE 0 END as White ,
CASE e.Ethnicity_Id WHEN 3 THEN 1 ELSE 0 END as Asian,
etc
FROM T_1 TT
JOINS
WHERE
GROUP
Msg 102, Level 15, State 1, Line 4
Incorrect syntax near '>'.
Here's the results (without the first CASE). Note person 3 stated multiple ethnicities.
SELECT count(tt.Person_ID) as CandCount, tt.Person_ID,
CASE e.Ethnicity_Id WHEN 1 THEN 1 ELSE 0 END as Black ,
CASE e.Ethnicity_Id WHEN 2 THEN 1 ELSE 0 END as White ,
CASE e.Ethnicity_Id WHEN 3 THEN 1 ELSE 0 END as Asian,
etc
FROM T_1 TT
JOINS
WHERE
GROUP
That’s expected, but the goal would be to assign multiple ethnicities to Ethnicity_Id of 10 (multiple). I also want them grouped on a single line.
So the end result would look like this:
So my issue is two fold. If the candidate has more than 2 ethnicities, assign the records to Ethnicity_Id of 10. I also need duplicated person IDs grouped into a single row, while displaying all of the results of the columns.
This should bring your desired result:
SELECT Person_ID
, ISNULL(ID_Dummy,Ethnicity_ID) Ethnicity_ID
, MAX(Black) Black
, MAX(White) White
, MAX(Asian) Asian
FROM #T T
OUTER APPLY(SELECT MAX(10) FROM #T T2
WHERE T2.Person_ID = T.Person_ID
AND T2.Ethnicity_ID <> T.Ethnicity_ID
)EthnicityOverride(ID_Dummy)
GROUP BY Person_ID, ISNULL(ID_Dummy,Ethnicity_ID)
You want conditional aggregation. Your query is incomplete, but the idea is:
select
person_id,
sum(case ethnicity_id = 1 then 1 else 0 end) as black,
sum(case ethnicity_id = 2 then 1 else 0 end) as white,
sum(case ethnicity_id = 3 then 1 else 0 end) as asian
from ...
where ...
group by person_id
You might want max() instead of sum(). Also I did not get the logic for column the second column in the desired results - maybe that's just count(*).
This would be my approach
SELECT
person_id,
CASE WHEN flag = 1 THEN Ethnicity_Id ELSE 10 END AS Ethnicity_Id,
[1] as black,
[2] as white,
[3] as asian
FROM
(
SELECT
person_id,
Ethnicity_Id as columns,
1 as n,
MAX(Ethnicity_Id) over(PARTITION BY person_id) as Ethnicity_Id,
COUNT(Ethnicity_Id) over(PARTITION BY person_id) as flag
FROM
#example
) AS SourceTable
PIVOT
(
MAX(n) FOR columns IN ([1], [2], [3])
) AS PivotTable;
Pivot the Ethnicity_Id column into multiples columns, Using constant
1 to make it complain with your expected result.
Using Max(Ethnicity_Id) with Partition By to get the original
Ethnicity_Id
Using Count(Ethnicity_Id) to flag if a need to raplace Ethnicity_Id
with 10 bc there is more that 1 row for that person_id
If you need to add more Ethnicitys add the ids in ... IN ([1], [2], [3]) ... and in the select
This question already has an answer here:
How to use an Alias in a Calculation for Another Field
(1 answer)
Closed 3 years ago.
In my query below I am counting occurrences in a table based on the Status column. I also want to perform calculations based on the counts I am returning. For example, let's say I want to add 100 to the Snoozed value... how do I do this? Below is what I thought would do it:
SELECT
pu.ID Id, pu.Name Name,
COUNT(*) LeadCount,
SUM(CASE WHEN Status = 'Working' THEN 1 ELSE 0 END) AS Working,
SUM(CASE WHEN Status = 'Uninterested' THEN 1 ELSE 0 END) AS Uninterested,
SUM(CASE WHEN Status = 'Converted' THEN 1 ELSE 0 END) AS Converted,
SUM(CASE WHEN SnoozedId > 0 THEN 1 ELSE 0 END) AS Snoozed,
Snoozed + 100 AS Test
FROM
Prospects p
INNER JOIN
ProspectsUsers pu on p.OwnerId = pu.SalesForceId
WHERE
p.Store = '108'
GROUP BY
pu.Name, pu.Id
ORDER BY
Name
I get this error:
Invalid column name 'Snoozed'.
How can I take the value of the previous SUM statement, add 100 to it, and return it as another column? What I was aiming for is an additional column labeled Test that has the Snooze count + 100.
You can't use one column to create another column in the same way that you are attempting. You have 2 options:
Do the full calculation (as #forpas has mentioned in the comments above)
Use a temp table or table variable to store the data, this way you can get the first 5 columns, and then you can add the last column or you can select from the temp table and do the last column calculations from there.
You can not use an alias as a column reference in the same query. The correct script is:
SELECT
pu.ID Id, pu.Name Name,
COUNT(*) LeadCount,
SUM(CASE WHEN Status = 'Working' THEN 1 ELSE 0 END) AS Working,
SUM(CASE WHEN Status = 'Uninterested' THEN 1 ELSE 0 END) AS Uninterested,
SUM(CASE WHEN Status = 'Converted' THEN 1 ELSE 0 END) AS Converted,
SUM(CASE WHEN SnoozedId > 0 THEN 1 ELSE 0 END)+100 AS Snoozed
FROM
Prospects p
INNER JOIN
ProspectsUsers pu on p.OwnerId = pu.SalesForceId
WHERE
p.Store = '108'
GROUP BY
pu.Name, pu.Id
ORDER BY
Name
MSSQL does not allow you to reference fields (or aliases) in the SELECT statement from within the same SELECT statement.
To work around this:
Use a CTE. Define the columns you want to select from in the CTE, and then select from them outside the CTE.
;WITH OurCte AS (
SELECT
5 + 5 - 3 AS OurInitialValue
)
SELECT
OurInitialValue / 2 AS OurFinalValue
FROM OurCte
Use a temp table. This is very similar in functionality to using a CTE, however, it does have different performance implications.
SELECT
5 + 5 - 3 AS OurInitialValue
INTO #OurTempTable
SELECT
OurInitialValue / 2 AS OurFinalValue
FROM #OurTempTable
Use a subquery. This tends to be more difficult to read than the above. I'm not certain what the advantage is to this - maybe someone in the comments can enlighten me.
SELECT
5 + 5 - 3 AS OurInitialValue
FROM (
SELECT
OurInitialValue / 2 AS OurFinalValue
) OurSubquery
Embed your calculations. opinion warning This is really sloppy, and not a great approach as you end up having to duplicate code, and can easily throw columns out-of-sync if you update the calculation in one location and not the other.
SELECT
5 + 5 - 3 AS OurInitialValue
, (5 + 5 - 3) / 2 AS OurFinalValue
You can't use a column alias in the same select. The column alias do not precedence / sequence; they are all created after the eval of the select result, just before group by and order by.
You must repeat code :
SELECT
pu.ID Id,pu.Name Name,
COUNT(*) LeadCount,
SUM(CASE WHEN Status = 'Working' THEN 1 ELSE 0 END) AS Working,
SUM(CASE WHEN Status = 'Uninterested' THEN 1 ELSE 0 END) AS Uninterested,
SUM(CASE WHEN Status = 'Converted' THEN 1 ELSE 0 END) AS Converted,
SUM(CASE WHEN SnoozedId > 0 THEN 1 ELSE 0 END) AS Snoozed,
SUM(CASE WHEN SnoozedId > 0 THEN 1 ELSE 0 END)+ 100 AS Test
FROM
Prospects p
INNER JOIN
ProspectsUsers pu on p.OwnerId = pu.SalesForceId
WHERE
p.Store = '108'
GROUP BY
pu.Name, pu.Id
ORDER BY
Name
If you don't want to repeat the code, use a subquery
SELECT
ID, Name, LeadCount, Working, Uninterested,Converted, Snoozed, Snoozed +100 AS test
FROM
(SELECT
pu.ID Id,pu.Name Name,
COUNT(*) LeadCount,
SUM(CASE WHEN Status = 'Working' THEN 1 ELSE 0 END) AS Working,
SUM(CASE WHEN Status = 'Uninterested' THEN 1 ELSE 0 END) AS Uninterested,
SUM(CASE WHEN Status = 'Converted' THEN 1 ELSE 0 END) AS Converted,
SUM(CASE WHEN SnoozedId > 0 THEN 1 ELSE 0 END) AS Snoozed
FROM Prospects p
INNER JOIN ProspectsUsers pu on p.OwnerId = pu.SalesForceId
WHERE p.Store = '108'
GROUP BY pu.Name, pu.Id) t
ORDER BY Name
or a view
I am looking for a DAX measure that is equal to If i have in SQL:
SELECT COUNT(NoDataValue WHEN -1 THEN 1 ELSE 0 END)
FROM
(
SELECT Employee.EmployeeID, CASE WHEN FACT.EmployeeID IS NULL
THEN -1
ELSE 1
END as NoDataValue
FROM Employee LEFT OUTER JOIN FACT
On Employee.EmployeeID = FACT.EmployeeID
) X
Essentially i want -1 when there is no data for an employee at the row level but when its aggregated i need count of NoDataValues (How many employees did not have data).
That is working fine at employee level with the measure i created
Annual Independence Compliance No Data:=
Var NoData=
SUM ( [NoDataValue] )
RETURN (IF (ISBLANK(NoData) , -1, NoData))
This looks like
But this is not aggregating the counts. I am having trouble of how to do that. This shows up as
I'm not sure if you SQL query is returning what you want but the query should look like below
SELECT SUM(case NoData WHEN -1 THEN 1 ELSE 0 END) as NoDataCount
FROM
(
SELECT Employee.EmployeeID, CASE WHEN FACT.EmployeeID IS NULL
THEN -1
ELSE 1
END as NoData
FROM Employee LEFT OUTER JOIN FACT
On Employee.EmployeeID = FACT.EmployeeID
) X
or
SELECT SUM(IIF(NoData = -1,1,0)) as NoDataCount
Hey guys I have the below sample data which i want to query for.
MemberID AGEQ1 AGEQ2 AGEQ2
-----------------------------------------------------------------
1217 2 null null
58458 3 2 null
58459 null null null
58457 null 5 null
299576 6 5 7
What i need to do is to lookup the table and if any AGEx COLUMN contains any data then it counts the number of times there is data for that row in each column
Results example:
for memberID 1217 the count would be 1
for memberID 58458 the count would be 2
for memberID 58459 the count would be 0 or null
for memberID 58457 the count would be 1
for memberID 299576 the count would be 3
This is how it should look like in SQL if i query the entire table
1 Children - 2
2 Children - 1
3 Children - 1
0 Children - 1
So far i have been doing it using the following query which isnt very efficient and does give incorrect tallies as there are multiple combinations that people can answer the AGE question. Also i have to write multiple queries and change the is null to is not null depending on how many children i am looking to count a person has
select COUNT (*) as '1 Children' from Member
where AGEQ1 is not null
and AGEQ2 is null
and AGEQ3 is null
The above query only gives me an answer of 1 but i want to be able to count the other columns for data as well
Hope this is nice and clear and thank you in advance
If all of the columns are integers, you can take advantage of integer math - dividing the column by itself will yield 1, unless the value is NULL, in which case COALESCE can convert the resulting NULL to 0.
SELECT
MemberID,
COALESCE(AGEQ1 / AGEQ1, 0)
+ COALESCE(AGEQ2 / AGEQ2, 0)
+ COALESCE(AGEQ3 / AGEQ3, 0)
+ COALESCE(AGEQ4 / AGEQ4, 0)
+ COALESCE(AGEQ5 / AGEQ5, 0)
+ COALESCE(AGEQ6 / AGEQ6, 0)
FROM dbo.table_name;
To get the number of people with each count of children, then:
;WITH y(y) AS
(
SELECT TOP (7) rn = ROW_NUMBER() OVER
(ORDER BY [object_id]) - 1 FROM sys.objects
),
x AS
(
SELECT
MemberID,
x = COALESCE(AGEQ1 / AGEQ1, 0)
+ COALESCE(AGEQ2 / AGEQ2, 0)
+ COALESCE(AGEQ3 / AGEQ3, 0)
+ COALESCE(AGEQ4 / AGEQ4, 0)
+ COALESCE(AGEQ5 / AGEQ5, 0)
+ COALESCE(AGEQ6 / AGEQ6, 0)
FROM dbo.table_name
)
SELECT
NumberOfChildren = y.y,
NumberOfPeopleWithThatMany = COUNT(x.x)
FROM y LEFT OUTER JOIN x ON y.y = x.x
GROUP BY y.y ORDER BY y.y;
I'd look at using UNPIVOT. That will make your wide column into rows. Since you don't care about what value was in a column, just the presence/absence of value, this will generate a row per not-null column.
The trick then becomes mashing that into the desired output format. It could probably have been done cleaner but I'm a fan of "showing my work" so that others can conform it to their needs.
SQLFiddle
-- Using the above logic
WITH HadAges AS
(
-- Find everyone and determine number of rows
SELECT
UP.MemberID
, count(1) AS rc
FROM
dbo.Member AS M
UNPIVOT
(
ColumnValue for ColumnName in (AGEQ1, AGEQ2, AGEQ3)
) AS UP
GROUP BY
UP.MemberID
)
, NoAge AS
(
-- Account for those that didn't show up
SELECT M.MemberID
FROM
dbo.Member AS M
EXCEPT
SELECT
H.MemberID
FROM
HadAges AS H
)
, NUMBERS AS
(
-- Allowable range is 1-6
SELECT TOP 6
ROW_NUMBER() OVER (ORDER BY (SELECT NULL)) AS TheCount
FROM
sys.all_columns AS SC
)
, COMBINATION AS
(
-- Link those with rows to their count
SELECT
N.TheCount AS ChildCount
, H.MemberID
FROM
NUMBERS AS N
LEFT OUTER JOIN
HadAges AS H
ON H.rc = N.TheCount
UNION ALL
-- Deal with the unlinked
SELECT
0
, NA.MemberID
FROM
NoAge AS NA
)
SELECT
C.ChildCount
, COUNT(C.MemberID) AS Instances
FROM
COMBINATION AS C
GROUP BY
C.ChildCount;
Try this:
select id, a+b+c+d+e+f
from ( select id,
case when age1 is null then 0 else 1 end a,
case when age2 is null then 0 else 1 end b,
case when age3 is null then 0 else 1 end c,
case when age4 is null then 0 else 1 end d,
case when age5 is null then 0 else 1 end e,
case when age6 is null then 0 else 1 end f
from ages
) as t
See here in fiddle http://sqlfiddle.com/#!3/88020/1
To get the quantity of persons with childs
select childs, count(*) as ct
from (
select id, a+b+c+d+e+f childs
from
(
select
id,
case when age1 is null then 0 else 1 end a,
case when age2 is null then 0 else 1 end b,
case when age3 is null then 0 else 1 end c,
case when age4 is null then 0 else 1 end d,
case when age5 is null then 0 else 1 end e,
case when age6 is null then 0 else 1 end f
from ages ) as t
) ct
group by childs
order by 1
See it here at fiddle http://sqlfiddle.com/#!3/88020/24
This is a query that is executed without problem with MySql 5.0.51:
SELECT cc_split.idSplit,
count( voteup.vote),
count( votedown.vote)
FROM cc_split
LEFT JOIN cc_split_usager AS voteup ON voteup.idSplit = cc_split.idSplit
AND voteup.vote >0
LEFT JOIN cc_split_usager AS votedown ON votedown.idSplit = cc_split.idSplit
AND votedown.vote <0
WHERE cc_split.isArchived = false
GROUP BY cc_split.idSplit
LIMIT 0, 30
The problem is with the COUNT that doesn't display what I would like to have. Has you can see, it takes the cc_ split_ usager and should count the number of vote that is positive and on the other hand count the amount of vote that is negative. The code above display the number 2 upvote and 2 downvote when in fact it should be 2 upvote and 1 downvote. What is the trick to have in a single SQL query the number of upvote and downvote.
The tables look like:
cc_split:
-idSplit
-...
cc_split_usager:
-idSplit
-vote (can be +1 or -1)
-...
Any hint for me?
Try:
SELECT s.idSplit,
count(case when v.vote > 0 then 1 else null end) as VoteUp,
count(case when v.vote < 0 then 1 else null end) as VoteDown
FROM cc_split s
LEFT JOIN cc_split_usager AS v ON v.idSplit = s.idSplit
WHERE s.isArchived = false
GROUP BY s.idSplit
LIMIT 0, 30
try this:
SELECT s.idSplit,
Sum( Case When vote > 0 Then 1 Else 0 End) UpVotes,
Sum( Case When vote < 0 Then 1 Else 0 End) DownVotes
FROM cc_split s
LEFT JOIN cc_split_usager v
ON v.idSplit = s.idSplit
WHERE s.isArchived = false
GROUP BY s.idSplit
LIMIT 0 , 30