SQL Server 2008 pivot query gone wrong with column name - sql
I have some problems regarding a pivot query. I am new to this. So look for something in the internet so I found dozens of them. So I decided to follow this Link. Been practice but seems like I ran into some obvious error.
My code is:
select
risk, [Quick] AS Quick, [Brown] AS Brown, [Fox] AS Fox
from
(select risk, site
from tst) as ps
PIVOT
(
count(risk)
for site in ([Brown], [Brown], [Fox])
) AS pvt
But it is throwing an error:
Invalid column name 'risk'.
Basically I want to have an output like this:
|Foo | Quick | Brown | Fox |
| 1 | 10 | 3 | 2 |
| 2 | 5 | 4 | 4 |
| 3 | 4 | 1 | 5 |
| 4 | 2 | 3 | 7 |
| 5 | 3 | 2 | 1 |
Something like that. Just counting how many there is in a specific number. Any help would be much appreciated. Thanks
The problem with your existing query is you are using the column risk in your final select list as well as inside of the aggregate function. Once you've counted the risk values for each site this is not available to display.
To get around this you can add a second version of the risk column to your subquery similar to the following. You then count this other column of risk and display one in the final select:
select risk, [ADAB] AS ADAB, [Bahrain] AS Bahrain, [Thumrait] AS Thumrait
from
(
select risk, piv_risk = risk, site
from qcqcif
) as ps
PIVOT
(
count(piv_risk)
for site in ([ADAB], [Bahrain], [Thumrait])
) AS pvt;
See SQL Fiddle with Demo
Related
SQL structure for multiple queries of the same table (using window function, case, join)
I have a complex production SQL question. It's actually PrestoDB Hadoop, but conforms to common SQL. I've got to get a bunch of metrics from a table, a little like this (sorry if the tables are mangled): +--------+--------------+------------------+ | device | install_date | customer_account | +--------+--------------+------------------+ | dev 1 | 1-Jun | 123 | | dev 1 | 4-Jun | 456 | | dev 1 | 10-Jun | 789 | | dev 2 | 20-Jun | 50 | | dev 2 | 25-Jun | 60 | +--------+--------------+------------------+ I need something like this: +--------+------------------+-------------------------+ | device | max_install_date | previous_account_number | +--------+------------------+-------------------------+ | dev 1 | 10-Jun | 456 | | dev 2 | 25-Jun | 50 | +--------+------------------+-------------------------+ I can do two separate queries to get max install date and previous account number, like this: select device, max(install_date) as max_install_date from (select [a whole bunch of stuff], dense_rank() over(partition by device order by [something_else]) rnk from some_table a ) But how do you combine them into one query to get one line for each device? I have rank, with statements, case statements, and one join. They all work individually but I'm banging my head to understand how to combine them all. I need to understand how to structure big queries. ps. any good books you recommend on advanced SQL for data analysis? I see a bunch on Amazon but nothing that tells me how to construct big queries like this. I'm not a DBA. I'm a data guy. Thanks.
You can use correlated subquery approach : select t.* from table t where install_date = (select max(install_date) from table t1 where t1.device = t.device); This assumes install_date has resonbale date format.
I think you want: select t.* from (select t.*, max(install_date) over (partition by device) as max_install_date, lag(customer_account) over (partition by device order by install-date) as prev_customer_account from t ) t where install_date = max_install_date;
Recursive self join over file data
I know there are many questions about recursive self joins, but they're mostly in a hierarchical data structure as follows: ID | Value | Parent id ----------------------------- But I was wondering if there was a way to do this in a specific case that I have where I don't necessarily have a parent id. My data will look like this when I initially load the file. ID | Line | ------------------------- 1 | 3,Formula,1,2,3,4,... 2 | *,record,abc,efg,hij,... 3 | ,,1,x,y,z,... 4 | ,,2,q,r,s,... 5 | 3,Formula,5,6,7,8,... 6 | *,record,lmn,opq,rst,... 7 | ,,1,t,u,v,... 8 | ,,2,l,m,n,... Essentially, its a CSV file where each row in the table is a line in the file. Lines 1 and 5 identify an object header and lines 3, 4, 7, and 8 identify the rows belonging to the object. The object header lines can have only 40 attributes which is why the object is broken up across multiple sections in the CSV file. What I'd like to do is take the table, separate out the record # column, and join it with itself multiple times so it achieves something like this: ID | Line | ------------------------- 1 | 3,Formula,1,2,3,4,5,6,7,8,... 2 | *,record,abc,efg,hij,lmn,opq,rst 3 | ,,1,x,y,z,t,u,v,... 4 | ,,2,q,r,s,l,m,n,... I know its probably possible, I'm just not sure where to start. My initial idea was to create a view that separates out the first and second columns in a view, and use the view as a way of joining in a repeated fashion on those two columns. However, I have some problems: I don't know how many sections will occur in the file for the same object The file can contain other objects as well so joining on the first two columns would be problematic if you have something like ID | Line | ------------------------- 1 | 3,Formula,1,2,3,4,... 2 | *,record,abc,efg,hij,... 3 | ,,1,x,y,z,... 4 | ,,2,q,r,s,... 5 | 3,Formula,5,6,7,8,... 6 | *,record,lmn,opq,rst,... 7 | ,,1,t,u,v,... 8 | ,,2,l,m,n,... 9 | ,4,Data,1,2,3,4,... 10 | *,record,lmn,opq,rst,... 11 | ,,1,t,u,v,... In the above case, my plan could join rows from the Data object in row 9 with the first rows of the Formula object by matching the record value of 1. UPDATE I know this is somewhat confusing. I tried doing this with C# a while back, but I had to basically write a recursive decent parser to parse the specific file format and it simply took to long because I had to get it in the database afterwards and it was too much for entity framework. It was taking hours just to convert one file since these files are excessively large. Either way, #Nolan Shang has the closest result to what I want. The only difference is this (sorry for the bad formatting): +----+------------+------------------------------------------+-----------------------+ | ID | header | x | value | +----+------------+------------------------------------------+-----------------------+ | 1 | 3,Formula, | ,1,2,3,4,5,6,7,8 |3,Formula,1,2,3,4,5,6,7,8 | | 2 | ,, | ,1,x,y,z,t,u,v | ,1,x,y,z,t,u,v | | 3 | ,, | ,2,q,r,s,l,m,n | ,2,q,r,s,l,m,n | | 4 | *,record, | ,abc,efg,hij,lmn,opq,rst |*,record,abc,efg,hij,lmn,opq,rst | | 5 | ,4, | ,Data,1,2,3,4 |,4,Data,1,2,3,4 | | 6 | *,record, | ,lmn,opq,rst | ,lmn,opq,rst | | 7 | ,, | ,1,t,u,v | ,1,t,u,v | +----+------------+------------------------------------------+-----------------------------------------------+
I agree that it would be better to export this to a scripting language and do it there. This will be a lot of work in TSQL. You've intimated that there are other possible scenarios you haven't shown, so I obviously can't give a comprehensive solution. I'm guessing this isn't something you need to do quickly on a repeated basis. More of a one-time transformation, so performance isn't an issue. One approach would be to do a LEFT JOIN to a hard-coded table of the possible identifying sub-strings like: 3,Formula, *,record, ,,1, ,,2, ,4,Data, Looks like it pretty much has to be human-selected and hard-coded because I can't find a reliable pattern that can be used to SELECT only these sub-strings. Then you SELECT from this artificially-created table (or derived table, or CTE) and LEFT JOIN to your actual table with a LIKE to get all the rows that use each of these values as their starting substring, strip out the starting characters to get the rest of the string, and use the STUFF..FOR XML trick to build the desired Line. How you get the ID column depends on what you want, for instance in your second example, I don't know what ID you want for the ,4,Data,... line. Do you want 5 because that's the next number in the results, or do you want 9 because that's the ID of the first occurrance of that sub-string? Code accordingly. If you want 5 it's a ROW_NUMBER(). If you want 9, you can add an ID column to the artificial table you created at the start of this approach. BTW, there's really nothing recursive about what you need done, so if you're still thinking in those terms, now would be a good time to stop. This is more of a "Group Concatenation" problem.
Here is a sample, but has some different with you need.
It is because I use the value the second comma as group header, so the ,,1 and ,,2 will be treated as same group, if you can use a parent id to indicated a group will be better
DECLARE #testdata TABLE(ID int,Line varchar(8000))
INSERT INTO #testdata
SELECT 1,'3,Formula,1,2,3,4,...' UNION ALL
SELECT 2,'*,record,abc,efg,hij,...' UNION ALL
SELECT 3,',,1,x,y,z,...' UNION ALL
SELECT 4,',,2,q,r,s,...' UNION ALL
SELECT 5,'3,Formula,5,6,7,8,...' UNION ALL
SELECT 6,'*,record,lmn,opq,rst,...' UNION ALL
SELECT 7,',,1,t,u,v,...' UNION ALL
SELECT 8,',,2,l,m,n,...' UNION ALL
SELECT 9,',4,Data,1,2,3,4,...' UNION ALL
SELECT 10,'*,record,lmn,opq,rst,...' UNION ALL
SELECT 11,',,1,t,u,v,...'
;WITH t AS(
SELECT *,REPLACE(SUBSTRING(t.Line,LEN(c.header)+1,LEN(t.Line)),',...','') AS data
FROM #testdata AS t
CROSS APPLY(VALUES(LEFT(t.Line,CHARINDEX(',',t.Line, CHARINDEX(',',t.Line)+1 )))) c(header)
)
SELECT MIN(ID) AS ID,t.header,c.x,t.header+STUFF(c.x,1,1,'') AS value
FROM t
OUTER APPLY(SELECT ','+tb.data FROM t AS tb WHERE tb.header=t.header FOR XML PATH('') ) c(x)
GROUP BY t.header,c.x
+----+------------+------------------------------------------+-----------------------------------------------+
| ID | header | x | value |
+----+------------+------------------------------------------+-----------------------------------------------+
| 1 | 3,Formula, | ,1,2,3,4,5,6,7,8 | 3,Formula,1,2,3,4,5,6,7,8 |
| 3 | ,, | ,1,x,y,z,2,q,r,s,1,t,u,v,2,l,m,n,1,t,u,v | ,,1,x,y,z,2,q,r,s,1,t,u,v,2,l,m,n,1,t,u,v |
| 2 | *,record, | ,abc,efg,hij,lmn,opq,rst,lmn,opq,rst | *,record,abc,efg,hij,lmn,opq,rst,lmn,opq,rst |
| 9 | ,4, | ,Data,1,2,3,4 | ,4,Data,1,2,3,4 |
+----+------------+------------------------------------------+-----------------------------------------------+
SQL Server : query with subquery involving select from previous selection
I'm trying to create a query in SQL Server to determine how many times a person's name shows up in a list, but also that list will be unknown, so I would have to get the actual name from the previous select index... It's hard to explain so I'll show the query first and hopefully someone can help. SELECT SpeakerName, Spoken, (SELECT COUNT(SpeakerName) FROM tbl_SpeakerCard_Log WHERE SpeakerName = 'SpeakerName[i]' AND SpeakDate = '3-9-16') as TimesSpoken FROM tbl_SpeakerCard_Log WHERE AID = #### ORDER BY GeneralComment ASC So basically, in SpeakerName[i], I'd like to somehow get the SpeakerName from the outer Select. The output should come out something like this +-------------+--------+-------------+ | SpeakerName | Spoken | TimesSpoken | +-------------+--------+-------------+ | Holly | 0 | 4 | | Robert | 1 | 5 | | Mike | 1 | 2 | +-------------+--------+-------------+
Try this: select x.SpeakerName, x.Spoken, COUNT(*) as TimesSpoken from tbl_SpeakerCard_Log x WHERE AID = #### and x.SpeakDate = '3-9-16' group by x.SpeakerName, x.Spoken Don't have SSMS installed on this computer so can't test it.
Split row into multiple rows in SQL Server for insert
I am trying to create a SQL query that will insert a single row as 2 rows in another table. My data looks like this: size | indemnity_factor | monitoring_factor -------------------------------------------- 0 | 1.00 | 1.5 The end data looks like this: id | claim_component_type_code | size | adjustment_factor | valid_from_date ------------------------------------------------------------------------------ 1 | Indemnity | 0 | 2.5000000 | 2014-01-01 1 | Monitoring | 1 | 1.5000000 | 2014-01-01 I want to add an entry of Indemnity and Monitoring for every row in the first data source. I haven't really got an idea how to go about it, would be very appreciative if someone could help. Sorry for the rough data but I can't post images with my reputation apparently. Thanks in advance.
Use unpivot select * from (select size, indemnity_factor as indemnity, monitoring_factor as monitoring from yourtable) src unpivot (adjustment_factor for claim_component_type_code in (indemnity, monitoring) ) u
How to get numbers arranged right to left in sql server SELECT statements
When performing SELECT statements including number columns (prices, for example), the result always is left to right ordered, which reduces the readability. Therefore I'm searching a method to format the output of number columns right to left.
I already tried to use something like
SELECT ... SPACE(15-LEN(A.Nummer))+A.Nummer ...
FROM Artikel AS A ...
which gives close results, but depending on font not really. An alternative would be to replace 'SPACE()' with 'REPLICATE('_',...)', but I don't really like the underscores in output.
Beside that this formula will crash on numbers with more digits than 15, therefore I searched for a way finding the maximum length of entries to make it more save like
SELECT ... SPACE(MAX(A.Nummer)-LEN(A.Nummer))+A.Nummer ...
FROM Artikel AS A ...
but this does not work due to the aggregate character of the MAX-function.
So, what's the best way to achieve the right-justified order for the number-columns?
Thanks,
Rainer
To get you problem with the list box solved have a look at this link: http://www.lebans.com/List_Combo.htm I strongly believe that this type of adjustment should be made in the UI layer and not mixed in with data retrieval. But to answer your original question i have created a SQL Fiddle: MS SQL Server 2008 Schema Setup: CREATE TABLE dbo.some_numbers(n INT); Create some example data: INSERT INTO dbo.some_numbers SELECT CHECKSUM(NEWID()) FROM (VALUES (1),(1),(1),(1),(1),(1),(1),(1),(1),(1))X(x); The following query is using the OVER() clause to specify that the MAX() is to be applied over all rows. The > and < that the result is wrapped in is just for illustration purposes and not required for the solution. Query 1: SELECT '>'+ SPACE(MAX(LEN(CAST(n AS VARCHAR(MAX))))OVER()-LEN(CAST(n AS VARCHAR(MAX))))+ CAST(n AS VARCHAR(MAX))+ '<' FROM dbo.some_numbers SN; Results: | COLUMN_0 | |---------------| | >-1486993739< | | > 1620287540< | | >-1451542215< | | >-1257364471< | | > -819471559< | | >-1364318127< | | >-1190313739< | | > 1682890896< | | >-1050938840< | | > 484064148< | This query does a straight case to show the difference: Query 2: SELECT '>'+CAST(n AS VARCHAR(MAX))+'<' FROM dbo.some_numbers SN; Results: | COLUMN_0 | |---------------| | >-1486993739< | | >1620287540< | | >-1451542215< | | >-1257364471< | | >-819471559< | | >-1364318127< | | >-1190313739< | | >1682890896< | | >-1050938840< | | >484064148< | With this query you still need to change the display font to a monospaced font like COURIER NEW. Otherwise, as you have noticed, the result is still misaligned.