I have a table which has the following content:
Customer ID Customer type
--------- --------
123 A
123 alpha
123 Beta
456 B
456 BGamma
456 BBeta
I want to achieve the following:
Customer_ID Customer_type Customer_E1 Customer E_2 Customer E_3
--------- ----------- ----------- ------------- -------------
123 A Alpha Beta
456 B BGamma BBeta
Can you please help me with a Sybase query to achieve this?
I don't believe Sybase has a PIVOT function which is what you are trying to do. So you might be able to implement something like this which uses an aggregate function with a CASE statement:
select customerid,
max(case when rn = 1 then customertype else null end) CustomerType,
max(case when rn = 2 then customertype else null end) Customer_E1,
max(case when rn = 3 then customertype else null end) Customer_E2
from
(
select CustomerID, CustomerType,
row_number() over(partition by CustomerID order by CustomerID) rn
from yourtable
) src
group by customerid
See SQL Fiddle with Demo
Note: I see a potential issue with the first column of data CustomerType. My suggestion would be to have this in a separate column from the other values. Then this will not take part in the row_number() assignment and it will be easier to guarantee that the correct value will appear.
Let me suggest that you normalize your data model. Clearly 'A' vs 'Alpha' are different kinds of data values (they describe different things), but you have them in the same field, which is causing you all sorts of problems. Take a look at this article on database normalization, which has a good discussion of the concepts involved.
Basically, what you want to end up with is having alpha and beta type values in a separate table that you can key into via Customer ID and Customer Type.
Related
I would like to ignore some of the results of my query as for all intents and purposes, some of the results are a duplicate, but based on the way the request was made, we need to use this hierarchy and although we are seeing different 'Company_Name' 's, we need to ignore one of the results.
Query:
SELECT
COUNT(DISTINCT A12.Company_name) AS Customer_Name_Count,
Company_Name,
SUM(Total_Sales) AS Total_Sales
FROM
some_table AS A12
GROUP BY
2
ORDER BY
3 ASC, 2 ASC
This code omits half a doze joins and where statements that are not germane to this question.
Results:
Customer_Name_Count Company_Name Total_Sales
-------------------------------------------------------------
1 3 Blockbuster 1,000
2 6 Jimmy's Bar 1,500
3 6 Jimmy's Restaurant 1,500
4 9 Impala Hotel 2,000
5 12 Sports Drink 2,500
In the above set, we can see that numbers 2 & 3 have the same count and the same total_sales number and similar company names. Is there a way to create a case statement that takes these 3 factors into consideration and then drops one or the other for Jimmy's enterprises? The other issue is that this has to be variable as there are other instances where this happens. And I would only want this to happen if the count and sales number match each other with a similar name in the company name.
Desired result:
Customer_Name_Count Company_Name Total_Sales
--------------------------------------------------------------
1 3 Blockbuster 1,000
2 6 Jimmy's Bar 1,500
3 9 Impala Hotel 2,000
4 12 Sports Drink 2,500
Looks like other answers are accurate based on assumption that Company_IDs are the same for both.
If Company_IDs are different for both Jimmy's Bar and Jimmy's Restaurant then you can use something like this. I suggest you get functional users involved and do some data clean-up else you'll be maintaining this every time this issue arise:
SELECT
COUNT(DISTINCT CASE
WHEN A12.Company_Name = 'Name2' THEN 'Name1'
ELSE A12.Company_Name
END) AS Customer_Name_Count
,CASE
WHEN A12.Company_Name = 'Name2' THEN 'Name1'
ELSE A12.Company_Name
END AS Company_Name
,SUM(A12.Total_Sales) AS Total_Sales
FROM some_table er
GROUP BY CASE
WHEN A12.Company_Name = 'Name2' THEN 'Name1'
ELSE A12.Company_Name
END
Your problem is that the joins you are using are multiplying the number of rows. Somewhere along the way, multiple names are associated with exactly the same entity (which is why the numbers are the same). You can fix this by aggregating by the right id:
SELECT COUNT(DISTINCT A12.Company_name) AS Customer_Name_Count,
MAX(Company_Name) as Company_Name,
SUM(Total_Sales) AS Total_Sales
FROM some_table AS A12
GROUP BY Company_id -- I'm guessing the column is something like this
ORDER BY 3 ASC, 2 ASC;
This might actually overstate the sales (I don't know). Better would be fixing the join so it only returned one name. One possibility is that it is a type-2 dimension, meaning that there is a time component for values that change over time. You may need to restrict the join to a single time period.
You need to have function to return a common name for the companies and then use DISTINCT:
SELECT DISTINCT
Customer_Name_Count,
dbo.GetCommonName(Company_Name) as Company_Name,
Total_Sales
FROM dbo.theTable
You can try to use ROW_NUMBER with window function to make row number by Customer_Name_Count and Total_Sales then get rn = 1
SELECT * FROM (
SELECT *,ROW_NUMBER() OVER(PARTITION BY Customer_Name_Count,Total_Sales ORDER BY Company_Name) rn
FROM (
SELECT
COUNT(DISTINCT A12.Company_name) AS Customer_Name_Count,
Company_Name,
SUM(Total_Sales) AS Total_Sales
FROM
some_table AS A12
GROUP BY
Company_Name
)t1
)t1
WHERE rn = 1
I have a query where I am counting the most frequent response in a database and ranking them by highest amount so using group by and order by.
The following shows how to do it for one:
select health, count(health) as count
from [Health].[Questionaire]
group by Health
order by count(Health) desc
which outputs the following:
Health Count
----------- -----
Very Good 6
Good 5
Poor 4
I would like to do with another column on the same table another query similar to the following so two queries using one sql statement like the following:
Health Count Diet Count
----------- ----- ----- -----
Very Good 6 Very Good 6
Good 5 Good 4
Poor 4 Poor 3
UPDATE!!
Hello this is how the table looks like at the moment
ID Diet Health
----------- ----- -------
101 Very Good Very Good
102 Poor Good
103 Poor Poor
I would like to do with another column on the same table another query similar to the following so two queries using one sql statement like the following:
Health Count Diet Count
----------- ----- ----- -----
Very Good 2 Very Good 1
Poor 1 Good 1
Good 0 Poor 1
Can anyone please help me out with this one?
Can provide further clarification if needed!
Here are 2 different ways of doing it, notice i removed the redundant column:
Test data:
DECLARE #t table(Health varchar(20), Diet varchar(20))
INSERT #t values
('Very good', 'Very good'),
('Poor', 'Good'),
('Poor', 'Poor')
Query 1:
;WITH CTE1 as
(
SELECT Health, count(*) CountHealth
FROM #t --[Health].[Questionaire]
GROUP BY health
), CTE2 as
(
SELECT Diet, count(*) CountDiet
FROM #t --[Health].[Questionaire]
GROUP BY Diet
)
SELECT
coalesce(Health, Diet) Grade,
coalesce(CountHealth, 0) CountHealth,
coalesce(CountDiet, 0) CountDiet
FROM CTE1
FULL JOIN
CTE2
ON CTE1.Health = CTE2.Diet
ORDER BY CountHealth DESC
Result 1:
Grade CountHealth CountDiet
Poor 2 1
Very good 1 1
Good 0 1
Mixing the results like that is really not good practice, so here is a different solution
Query 2:
SELECT Health, count(*) Count, 'Health' Grade
FROM #t --[Health].[Questionaire]
GROUP BY health
UNION ALL
SELECT Diet, count(*) CountDiet, 'Diet'
FROM #t --[Health].[Questionaire]
GROUP BY Diet
ORDER BY Grade, Count DESC
Result 2:
Health Count Grade
Good 1 Diet
Poor 1 Diet
Very good 1 Diet
Poor 2 Health
Very good 1 Health
You need to join the table to itself, but (as your sample data shows) to deal with gaps in actual data for specific values.
If you have a table that has the range of health/diet values:
select
v.value Status,
count(a.id) healthCount,
count(b.id) DietCount
from health_diet_values v
left join Questionaire a on a.health = v.value
left join Questionaire b on b.diet = v.value
group by v.value
or if you don't have such a table, you need to generate the list of values manually and join from that:
select
v.value Status,
count(a.id) healthCount,
count(b.id) DietCount
from (select 'Very Good' value union all
select 'Good' union all
select 'Poor') v
left join Questionaire a on a.health = v.value
left join Questionaire b on b.diet = v.value
group by v.value
Both of these queries produce zeroes if there is no matching data for the value.
Note that in your desired output you have a redundant column - you repeat the value column. The above queries produce output that looks like:
Status HealthCount DietCount
-------------------------------
Very Good 2 1
Good 1 1
Poor 0 1
I have 3 select queries :
the result of first for heading of my table.(like : select id, name from cars)
the second result show left side of my schedule table shows the date of sales (select date from dates inner join car on date.carid = car.carid where date.date1 > XXX/XX/XX for example)
the third result returns the data for inside the table. and it is the price of each car in each date.
But I don't know how to combine them?
I guess you need something like this Working SQL Server fiddle here
You need either of the following
Pivot feature of SQL Server
Aggregate function with group-by
Query: Pivot feature of SQL Server
SELECT *
FROM
(
SELECT [SALE_DATE], [CAR_NAME], [COST]
FROM CARS_SALES
) AS source
PIVOT
(
MAX(COST)
FOR [CAR_NAME] IN ([BENZ] , [BMW], [RENAULT])
) as pvt;
Query: Aggregate function with group-by
SELECT SALE_DATE,
MAX(CASE WHEN CAR_NAME = 'BENZ' THEN COST ELSE NULL END) [BENZ],
MAX(CASE WHEN CAR_NAME = 'BMW' THEN COST ELSE NULL END) [BMW],
MAX(CASE WHEN CAR_NAME = 'RENAULT' THEN COST ELSE NULL END) [RENAULT]
FROM CARS_SALES
GROUP BY SALE_DATE
Both the Queries give an
output result
as below:
SALE_DATE BENZ BMW RENAULT
09/07/2014 (null) (null) 900
09/08/2014 100 200 300
09/09/2014 400 600 (null)
09/10/2014 700 500 800
It's really unclear, but based on that you've posted, the solution would be something like this:
select cars.name, dates.date, dates.price
from dates
left join cars on (cars.carid=dates.carid)
order by cars.name, dates.date;
This gets the car's name, price and the date in one query. But I don't understand what your third query is for. If you provide more information I'll update this answer.
I'm trying to group some data and separate one column into several. The following is the kind of table I'm working with although each of these columns are from individual tables connected through an ID on each:
ParticipantId QuestionText QuestionAnswer
1 What is your gender? 2
2 What is your gender? 1
3 What is your gender? 1
4 What is your gender? 2
5 What is your gender? 1
1 What is your age? 28
2 What is your age? NULL
3 What is your age? 55
4 What is your age? 63
And this is what I want to achieve:
ParticipantId Question1Answer Question2Answer Question3Answer
1 2 28 3
2 1 NULL 4
I imagine this is quite a difficult thing to do? As the questionnaire contains around 100 questions. I don't think using case would be suitable without typing each questionID out. I'm using SQL Server 2008. The following is some of the table structures I'm working with. I'm sure there's an clearer way than typing it out.
The QuestionnaireQuestion table contains QuestionNumber for the sequence and joins to the Question table to via questionID which is the Question tables PID. The question table contains QuestionText and links to the Answer table using QuestionID which contains the answer field. Then the answer table goes through a link table called QuestionnaireInstance which finally links to the PaperQuestionnaire table which contains the ParticipantID.
That probably hasn't made it any clearer, just let me know anything else that might clear it up a bit.
In case you don't want to have to type out all of the question text each time, you could always use this:
;with sample_data as
(
SELECT
ParticipantId
,QuestionText
,QuestionAnswer
,row_number() OVER (PARTITION BY PARTICIPANTID ORDER BY (SELECT NULL)) AS rn
FROM yourdatatable
)
SELECT
PARTICIPANTID
,MAX(CASE WHEN rn = 1 THEN questionanswer END) AS Q1
,MAX(CASE WHEN rn = 2 THEN questionanswer END) AS Q2
,MAX(CASE WHEN rn = 3 THEN questionanswer END) AS Q3
,MAX(CASE WHEN rn = 4 THEN questionanswer END) AS Q4
FROM sample_data
GROUP BY ParticipantId
Although it might be better in your case to consider dynamic pivoting instead, depending on how many columns you want to ultimately end up with
If you have uniquness in you table for column combination ParticipantId and QuestionText then you can use below query also to acive the desired output -
SELECT Participantid,
MAX(CASE
WHEN Questiontext = 'What is your gender?' THEN
Questionanswer
ELSE
NULL
END) AS Question1answer,
MAX(CASE
WHEN Questiontext = 'What is your age?' THEN
Questionanswer
ELSE
NULL
END) AS Question2answer,
MAX(CASE
WHEN Questiontext = '...your third question...' THEN
Questionanswer
ELSE
NULL
END) AS Question3answer,
..
..
FROM Your_Table_Name
GROUP BY Participantid
What I am looking for is to group by and count the total of different data in the same table and have them show in two different columns. Like below.
Data in table A
Fields:
Name Type
Bob 1
John 2
Bob 1
Steve 1
John 1
Bob 2
Desired result from query:
Name Type 1 Type 2
Bob 2 1
John 1 1
Steve 1 0
This will do the trick in SQL Server:
SELECT
name,
SUM( CASE type WHEN 1 THEN 1 ELSE 0 END) AS type1,
SUM( CASE type WHEN 2 THEN 1 ELSE 0 END) AS type2
FROM
myTable
GROUP BY
name
No time to write the code, but the Case statement is what you want here. SImply havea value of 1 if it meets the case and zero if it deosn't. Then you can sum the columns.
Use two separate GROUP BY subqueries.
SELECT Name, a.Count1, b.Count2
from myTable
JOIN
(SELECT Name, SUM(Type) AS Count1 FROM myTable GROUP BY Name WHERE Type=1) AS a ON a.Name = myTable.Name
(SELECT Name, SUM(Type) FROM myTable GROUP BY Name WHERE Type=2) AS b ON b.Name = myTable.Name
You're looking for a CrossTab solution. The above solutions will work, but you'll come unstuck if you want a general solution and have N types.
A CrossTab solution will solve this for you. If this is for quickly crunching some numbers then dump your data into Excel and use the native Pivot Table feature.
If it's for a RDBMS in an app, then it depends upon the RDBMS. MS SQL 2005 and above has a crosstab syntax. See:
http://www.databasejournal.com/features/mssql/article.php/3521101/Cross-Tab-reports-in-SQL-Server-2005.htm
#Seb has a good solution, but it's server-dependent. Here's an alternate using subselects that should be portable:
select
name,
(select count(type) from myTable where type=1 and name=a.name) as type1,
(select count(type) from myTable where type=2 and name=a.name) as type2
from
myTable as a
group by
name