SELECT, SORT, And SUM Query
Oct 14, 2005
Hello everyone,
I Have a table with columns:
- CustomerID
- DateTransactionCompleted
- AmountPaid
Illustration data as follow
GO
INSERT INTO Cus_Tab_Dev_2 VALUES(30,'12-12-2004','18000.00')
INSERT INTO Cus_Tab_Dev_2 VALUES(30,'12-15-2004','2000.00')
INSERT INTO CUS_Tab_Dev_2 VALUES(30,'1-16-2005','15000.00')
INSERT INTO CUS_TAB_DEV_2 VALUES(42,'2-2-2005','12000.00')
GO
What I want is a report that tells me the Total Sales per month Per Customer in the following manner:
Customer ID Month/Year Total Per Month
----------- ----------- ----------------
30 12-2004 20000.00
30 1-2005 15000.00
42 2-2005 12000.00
This is a homework, and I have been trying to get it to work since this morning. Any help is appreciated.
PS: If you do not feel you want/should help. Please don't call me names! I don't ask people to help me with my homework usually. But, I am running out of time on the assignment.
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Mar 18, 2004
I am trying to select a record from a table where it has the smallest priority
how would you go about doing this
is there a cool sort command or is there a select command syntax that can do this
thanks
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Oct 4, 2007
hi,
i have a stored procedure SELECT PictureID, Left(Name, 16) + '...' AS ShortName
FROM Pictures
some pictures has their name lower that 16 characters, and when i show on the page is something like "Sunrise..."
how can i 'sort' the Select so to return the ShortName if the name is greater than 16 characters or return Name if is lower
i hope you understand what i mean...
thanks
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Sep 15, 2006
I use SQL Server 2005.
I want to split the data in a table into two parts, say 30%-70%.
Here are my query statements:
-- 30%
SELECT top 30 percent * FROM DataTable ORDER BY Col1
--70%
SELECT top 70 percent * FROM DataTable ORDER BY Col1 DESC
Somebody says the result is not guaranteed to be correct since in SQL Server 2005, the query optimizer may choose different strategy to execute the query statement.
I think select should execute after order by, which has nothing to do with query optimization. Am I correct?
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Jul 29, 2011
We have a database where the nvarchar columns currently holding English only data. It keeps the training information. Currently the default collation is Latin Case insensitive accent insensitive.
Now we are planning to allow multiple language support. When we go for it, we will upload the data from different languages. Based on user preferences, he/she should be able to query the data (One language at a time).
I am worried on how the existing queries will work if I load all language data in the same database.
For example, some characters in English are used in Norwegian too. But they have different sort order. ALso LIKE conditions too may fail.
So far I thought of few solutions: Add the Collation information along with select , order by clauses. It means we need to add more procedures (one set per collation) The other option is to create new database for each language. Each will have its own collation. The dowside is we need more databases which may lead to more servers and more maintenance work.
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Feb 28, 2005
Trying to get data from result of MDX query in dec order:
iLoopFrom = cst.Axes(1).Positions.Count - 1
iLoopTo = 0
iLoopStep = -1
im using these lines to read the data from bottom to top but what exactly does Position.Count do? and is the -1 there because the result has headers??
Thanks
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Jan 2, 2007
I'm trying to find a way to sort my query like the following:
SELECT * FROM tbl_Post WHERE ID = 3 OR ID = 1 OR ID = 4 OR ID = 2 ORDER BY (3,1,4,2)
Now if ID is my primary key, the sort by default would be 1, 2, 3, 4.
I would like to specify order so that I could return the order as 3, 1, 4, 2 if I wanted to.
Is there any way to do this?
Thanks,Russ
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Dec 18, 2007
Dear All,
i need your help,
i had created a table student, studentid column with alpha numeric primary key with varchar datatype
now my problem: i want to sort the student id accroding to studentid like
STU1
STU2
STU3
STU4
STU5
.
.
.
STU9
STU10
STU11
but i’m getting the sorted result like this, how to overcome this problem,guide me PLEASE
STU1
STU10
STU11
STU12
.
.
.
STU100
.
.
.
STU1000
STU10000
STU2
STU20
STU200
STU2000
STU20000
STU20001
Thank's In Advances
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Feb 27, 2005
I have a query:
SELECT *
FROM Mobile_Subscriber
WHERE (sub_ID IN (17, 2, 19))
The result return:
sub_ID sub_name
2 John
17 Alice
19 Eddy
But what I want is:
sub_ID sub_name
17Alice
2John
19Eddy
Is it possible to return the result order by the query with: sub_ID IN (17,2,19)?
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Jul 23, 2005
I have three tables:tblBook has the fields bookID, bookRangeID, bookSubjectID, bookCodetblBookRange has the fields bookRangeID, bookRangeDescriptiontblBookSubject has the fields bookSubjectID, bookSubjectDescriptionso some typical data in tblBook might be:1, 1, 1, B1HBSCI2, 1, 2, B2HBFRE13, 1, 3, B3HBGER4, 2, 1, B4PBSCI5, 2, 2, B5PBFRE6, 2, 3, B6PBGER7, 3, 1, B7CDSCI8, 3, 2, B8CDFRE9, 3, 3, B9CDGER110, 3, 3, B10CDGER211, 1, 2, B11HBFRE2tblBookRange would be:1, HardBack2, PaperBack3, CD RomtblBookSubject would be:1, Science2, French3, GermanI'd like to create a query which will return me the subjects along thetop, the book range down the side, and the bookcodes in the cells, abit like this:BookRange , Science, French, GermanHardBack , B1HBSCI, B2HBFRE1 B11HBFRE2, B3HBGERPaperBack , B4PBSCI, B5PBFRE, B6PBGERCD Rom , B7CDSCI, B8CDFRE, B9CDGER1 B10CDGER2Does that make any sense? So basically I'd like to get some kind ofdynamic SQL working which will do this kind of thing. I don't want tohard code the subjects in or the book ranges. I get the feeling thatdynamic SQL is the way forward with this and possibly using a cursor ortwo too, but it got quite nasty and convoluted when I tried variousattempts to get it working. (one of the ways I tried included workingout each result in a dynamic script, but it ran out of characters asthere were too many "subjects".)If anyone has any nice but quite dynamic solutions, I'd be delighted tohear.(and I know some of you have already told me you don't like tablesbeginnig with tbl, but I'm not hear for a lecture on namingconventions, I'm hear to learn and share ideas :o) )
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Jul 20, 2005
I have a field called "type" in my "school" table that can have threepossibilities:ElementaryMiddleHighIn my result set, I always want Elementary to come first, Middle tocome second, and High to come third. An alpha sort gets me this:ElementaryHighMiddleSure, I could create a look-up that assigns an integer to the "type"field to get the right sort order (i.e. elementary = 0, middle = 1,high = 2) ... but is there a better way to do this with SQL syntax?Thanks,Ralph NobleJoin Bytes!
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Aug 3, 2007
I want to sort on a field that I construct during a query....how can I solve this?Basically what i am doing is selecting mediafiles with comments in descending order. (so mediafile with most comments on top)Here's my (not working) query, because it throws the error that the mediaComments column is unknown....SELECT *FROM(select ROW_NUMBER() OVER (ORDER BY mediaComments DESC) as RowNum,m.title,m.usercode,mediaComments=(select count(*) from MediaComments where mediaid=m.mediaid)FROM Media m WHERE m.usercode>0group by m.title,m.usercode) as InfoWHERE RowNum between @startRowIndex AND (@startRowIndex + @maximumRows-1)
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Aug 7, 2007
I am trying to set sorting up on a DataGrid in ASP.NET 2.0. I have it working so that when you click on the column header, it sorts by that column, what I would like to do is set it up so that when you click the column header again it sorts on that field again, but in the opposite direction. I have it working using the following code in the stored procedure: CASE WHEN @SortColumn = 'Field1' AND @SortOrder = 'DESC' THEN Convert(sql_variant, FileName) end DESC,
case when @SortColumn = 'Field1' AND @SortOrder = 'ASC' then Convert(sql_variant, FileName) end ASC,
case WHEN @SortColumn = 'Field2' and @SortOrder = 'DESC' THEN CONVERT(sql_variant, Convert(varchar(8000), FileDesc)) end DESC,
case when @SortColumn = 'Field2' and @SortOrder = 'ASC' then convert(sql_variant, convert(varchar(8000), FileDesc)) end ASC,
case when @SortColumn = 'VersionNotes' and @SortOrder = 'DESC' then convert(sql_variant, convert(varchar(8000), VersionNotes)) end DESC,
case when @SortColumn = 'VersionNotes' and @SortOrder = 'ASC' then convert(sql_variant, convert(varchar(8000), VersionNotes)) end ASC,
case WHEN @SortColumn = 'FileDataID' and @SortOrder = 'DESC' THEN CONVERT(sql_variant, FileDataID) end DESC,
case WHEN @SortColumn = 'FileDataID' and @SortOrder = 'ASC' THEN CONVERT(sql_variant, FileDataID) end ASC And I gotta tell you, that is ugly code, in my opinion. What I am trying to do is something like this: case when @SortColumn = 'Field1' then FileName end,
case when @SortColumn = 'FileDataID' then FileDataID end,
case when @SortColumn = 'Field2' then FileDesc
when @SortColumn = 'VersionNotes' then VersionNotes
end
case when @SortOrder = 'DESC' then DESC
when @SortOrder = 'ASC' then ASC
end and it's not working at all, i get an error saying: Incorrect syntax near the keyword 'case' when i put a comma after the end on line 5 i get: Incorrect syntax near the keyword 'DESC' What am I missing here? Thanks in advance for any help -Madrak
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Mar 15, 2007
Hi Everyone,I am creating a portal and want the user to be able to select four variants from four separate drop down boxes... Such as chapter, story, etc... The user will then be able to click Find and shorten up the gridview list. The below query is what I am using for my current gridview (with custom paging). What I want to do is something like this: Pass a variable such as @Story. If no Story is chosen, then the variable would be *. If a variable is chosen, the the @Story would the StoryID. However, I don't believe SQL recognizes the * in this case. I was thinking it should, but I don't believe it does. I was hoping it would just take it and I could write, SELECT * from Stories where StoryId=@Story, or something like that... and if * was @Story, then it would just select all... or if it was 1, then just stories with a StoryId of 1.Am I totally off base here? Thanks! CREATE PROCEDURE SortAllStories@startRowIndex int,@maximumRows int,@totalRows int OUTPUTASDECLARE @first_id int, @startRow intSET @startRowIndex = (@startRowIndex - 1) * @maximumRowsIF @startRowIndex = 0SET @startRowIndex = 1SET ROWCOUNT @startRowIndexSELECT @first_id = StoriesID FROM Storie ORDER BY StoriesIdPRINT @first_idSET ROWCOUNT @maximumRowsSELECT Stories.StoryId, Chapters.ChapterName, Chapters.EnglishName, Translations.Translation,Stories.Verse, Stories.StoryFROM Chapters, Stories, TranslationsWHERE Chapters.ChapterId=Stories.ChapterId AND Translations.TranslationId = Stories.TranslationId AND Stories.StoryId >= @first_idORDER BY Stories.StoryIdSET ROWCOUNT 0SELECT @totalRows = COUNT(StoryId) FROM Stories
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Jan 16, 2005
Hi,
Anyone can help me for the Sql query?
I want to sort a table with a priority column, e.g. in the following...
Table A
======
value
======
9
3
1
7
4
======
After sorting:
Table A
========
no value
========
1 1
2 3
3 4
4 7
5 9
========
Anyone can help me?
Thanks.
Daniel.
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Jan 30, 2015
which have a lot of impact to database performace since it do not fit onto memory and spill over to disks.
The question is when i ran a profiler and tried to catch a sort warning i cannot find the query which cause the alert.
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Sep 17, 2015
I am using a table to store different size numbers for example:
Look at the picture below:
But I want this type of output look at the picture below:
How to sort the query to return greater than zero values to sort up and zeros go down.
I am using sql server 2008.
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Feb 8, 2008
Not sure if this is possible, but maybe. I have a table that contains a bunch of logs.
I'm doing something like SELECT * FROM LOGS. The primary key in this table is LogID.
I have another table that contains error messages. Each LogID could have multiple error messages associated with it. To get the error messages.
When I perform my first select query listed above, I would like one of the columns to be populated with ALL the error messages for that particular LogID (SELECT * FROM ERRORS WHERE LogID = MyLogID).
Any thoughts as to how I could accomplish such a daring feat?
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Mar 27, 2008
Hi!
I recently run into a senario when a procedure quiered a table without a order by clause. Luckily it retrived data in the prefered order.
The table returns the data in the same order in SQL Manager "Open Table"
So I started to wonder what deterimins the sort order when there is no order by clause ?
I researched this for a bit but found no straight answers. My table has no PK, but an identiy column.
Peace.
/P
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Aug 2, 2006
this data. need help
Sort following numbers by asc and desc order
Before query sort
-1.1
-8.8
-15.5
0.0
+0.5
+0.2
Sort asc
+0.5
+0.2
0.0
-1.1
-8.8
Sort Desc
-8.8
-1.1
0.0
+0.2
+0.5
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Sep 6, 2006
Hi, not exactly too sure if this can be done but I have a need to run a query which will return a list of values from 1 column. Then I need to iterate this list to produce the resultset for return.
This is implemented as a stored procedure
declare @OwnerIdent varchar(7)
set @OwnerIdent='A12345B'
SELECT table1.val1 FROM table1 INNER JOIN table2
ON table1. Ident = table2.Ident
WHERE table2.Ident = @OwnerIdent
'Now for each result of the above I need to run the below query
SELECT Clients.Name , Clients.Address1 ,
Clients.BPhone, Clients.email
FROM Clients INNER JOIN Growers ON Clients.ClientKey = Growers.ClientKey
WHERE Growers.PIN = @newpin)
'@newpin being the result from first query
Any help appreciated
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Jul 20, 2005
I haven't a clue how to accomplish this.All the data is in one table. The data is stored by registration dateand includes county and number of students brokne out by grade.Any help appreciated!Rob
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Jul 9, 2002
When I run simple select against my view in Query Analyzer, I get result set in one sort order. The sort order differs, when I BCP the same view. Using third technique i.e. Select Into, I have observed the sort order is again different in the resulting table. My question is what is the difference in mechanisim of query analyzer, bcp, and select into.
Thanks
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Aug 22, 2006
have a table with students details in it, i want to select all the students who joined a class on a particular day and then i need another query to select all students who joined classes over the course of date range eg 03/12/2003 to 12/12/2003.
i have tried with the following query, i need help putting my queries together
select * from tblstudents where classID='1' and studentstartdate between ('03/12/2004') and ('03/12/2004')
when i run this query i get this message
Server: Msg 242, Level 16, State 3, Line 1
The conversion of a char data type to a datetime data type resulted in an out-of-range datetime value.
the studentstartdate field is set as datetime 8 and the date looks like this in the table 03/12/2004 03:12:15
please help
mustfa
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Aug 5, 2014
I have the following code.
SELECT _bvSerialMasterFull.SerialNumber, _bvSerialMasterFull.SNStockLink, _bvSerialMasterFull.SNDateLMove, _bvSerialMasterFull.CurrentLoc,
_bvSerialMasterFull.CurrentAccLink, _bvSerialMasterFull.StockCode, _bvSerialMasterFull.CurrentAccount, _bvSerialMasterFull.CurrentLocationDesc,
_bvSerialNumbersFull.SNTxDate, _bvSerialNumbersFull.SNTxReference, _bvSerialNumbersFull.SNTrCodeID, _bvSerialNumbersFull.SNTransType,
_bvSerialNumbersFull.SNWarehouseID, _bvSerialNumbersFull.TransAccount, _bvSerialNumbersFull.TransTypeDesc,
[code]...
However, as you can see, the original select query is run twice and joined together.What I was hoping for is this to be done in the original query without the need to duplicate the original query.
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Jun 26, 2015
how do I get the variables in the cursor, set statement, to NOT update the temp table with the value of the variable ? I want it to pull a date, not the column name stored in the variable...
create table #temptable (columname varchar(150), columnheader varchar(150), earliestdate varchar(120), mostrecentdate varchar(120))
insert into #temptable
SELECT ColumnName, headername, '', '' FROM eddsdbo.[ArtifactViewField] WHERE ItemListType = 'DateTime' AND ArtifactTypeID = 10
--column name
declare @cname varchar(30)
[code]...
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Jul 10, 2015
I have a query that performs a comparison between 2 different databases and returns the results of the comparison. It returns 2 columns. The 1st column is the value of the object being compared, and the 2nd column is a number representing any discrepancies.What I would like to do is use the results from this 1st query in the where clause of another separate query so that this 2nd query will only run for any primary values from the 1st query where a secondary value in the 1st query is not equal to zero.I was thinking of using an "IN" function in the 2nd query to pull data from the 1st column in the 1st query where the 2nd column in the 1st query != 0, but I'm having trouble ironing out the correct syntax, and conceptualizing this optimally.
While I would prefer to only return values from the 1st query where the comparison value != 0 in order to have a concise list to work with, I am having difficulty in that the comparison value is a mathematical calculation of 2 different tables in 2 different databases, and so far I've been forced to include it in the select criteria because the where clause does not accept it.Also, I am not a DBA by trade. I am a system administrator writing SQL code for reporting data from an application I support.
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May 9, 2015
I have a column colC in a table myTable that has a value (e.g. '0X'). The position of a non-zero character in column colC refers to the ordinal position of another column in the table myTable (in the aforementioned example, colB).
To get a column name (i.e., colA or colB) from table myTable, I can join ("ON cte.pos = cn.ORDINAL_POSITION") to INFORMATION_SCHEMA.COLUMNS for that table catalog, schema and name. But I want to show the value of what is in that column (e.g., 'ABC'), not just the name. Hoping for:
COLUMN_NAME Value
----------- -----
colB 123
colA XYZ
I've tried dynamic SQL to no success, probably not executing the concept correctly...
Below is what I have:
CREATE TABLE myTable (colA VARCHAR(3), colB VARCHAR(3), colC VARCHAR(3))
INSERT INTO myTable (colA, colB, colC) VALUES ('ABC', '123', '0X')
INSERT INTO myTable (colA, colB, colC) VALUES ('XYZ', '789', 'X0')
;WITH cte AS
(
SELECT CAST(PATINDEX('%[^0]%', colC) AS SMALLINT) pos, STUFF(colC, 1, PATINDEX('%[^0]%', colC), '') colC
[Code] ....
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Oct 15, 2007
Hello,
I hope someone can answer this, I'm not even sure where to start looking for documentation on this. The SQL query I'm referencing is included at the bottom of this post.
I have a query with 3 select statements joined together like tables. It works great, except for the fact that I need to declare a variable and make it a table within two of those 3. The example is below. You'll see that I have three select statements made into tables A, B, and C, and that table A has a variable @years, which is a table.
This works when I just run table A by itself, but when I execute the entire query, I get an error about the "declare" keyword, and then some other errors near the word "as" and the ")" character. These are some of those errors that I find pretty meaningless that just mean I've really thrown something off.
So, am I not allowed to declare a variable within these SELECT tables that I'm creating and joining?
Thanks in advance,
Andy
Select * from
(
declare @years table (years int);
insert into @years
select
CASE
WHEN month(getdate()) in (1) THEN year(getdate())-1
WHEN month(getdate()) in (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12) THEN year(getdate())
END
select
u.fullname
, sum(tx.Dm_Time) LastMonthBillhours
, sum(tx.Dm_Time)/((select dm_billabledays from dm_billabledays where Dm_Month = Month(GetDate()))*8) lasmosbillingpercentage
from
Dm_TimeEntry tx
join
systemuserbase u
on
(tx.owninguser = u.systemuserid)
where
Month(tx.Dm_Date) = Month(getdate())-1
and
year(dm_date) = (select years from @years)
and tx.dm_billable = 1
group by u.fullname
) as A
left outer join
(select
u.FullName
, sum(tx.Dm_Time) Billhours
, ((sum(tx.Dm_Time))
/
((day(getdate()) * ((5.0)/(7.0))) * 8)) perc
from
Dm_TimeEntry tx
join
systemuserbase u
on
(tx.owninguser = u.systemuserid)
where
tx.Dm_Billable = '1'
and
month(tx.Dm_Date) = month(GetDate())
and
year(tx.Dm_Date) = year(GetDate())
group by u.fullname) as B
on
A.Fullname = B.Fullname
Left Outer Join
(
select
u.fullname
, sum(tx.Dm_Time) TwomosagoBillhours
, sum(tx.Dm_Time)/((select dm_billabledays from dm_billabledays where Dm_Month = Month(GetDate()))*8) twomosagobillingpercentage
from
Dm_TimeEntry tx
join
systemuserbase u
on
(tx.owninguser = u.systemuserid)
where
Month(tx.Dm_Date) = Month(getdate())-2
group by u.fullname
) as C
on
A.Fullname = C.Fullname
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Oct 29, 1998
hi, does it make a difference to write the following select statement in either query window or create a sp and then calling the store procedure to be executed..
select * from authors
OR
create procedure authors as
select * from authors
lets assume that we have million records in the author table. is it faster to run the query from within a store procedure or not ?
thanks for your input
Ali
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Sep 3, 2007
Hello... im having a problem with my query optimization....
I have a query that looks like this:
SELECT * FROM table1
WHERE location_id IN (SELECT location_id from location_table WHERE account_id = 998)
it produces my desired data but it takes 3 minutes to run the query... is there any way to make this faster?... thank you so much...
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Jan 28, 2008
Hi,
Please help me with an SQL Query that fetches all the records from the three tables but a unique record for each forum and topicid with the maximum lastpostdate. I have to bind the result to a GridView.Please provide separate solutions for SqlServer2000/2005.
I have three tables namely – Forums,Topics and Threads in SQL Server2000 (scripts for table creation and insertion of test data given at the end). Now, I have formulated a query as below :-
SELECT ALL f.forumid,t.topicid,t.name,th.author,th.lastpostdate,(select count(threadid) from threads where topicid=t.topicid) as NoOfThreads
FROM
Forums f FULL JOIN Topics t ON f.forumid=t.forumid
FULL JOIN Threads th ON t.topicid=th.topicid
GROUP BY t.topicid,f.forumid,t.name,th.author,th.lastpostdate
ORDER BY t.topicid ASC,th.lastpostdate DESC
Whose result set is as below:-
forumid
topicid
name
author
lastpostdate
NoOfThreads
1
1
Java Overall
x@y.com
2008-01-27 14:48:53.000
2
1
1
Java Overall
a@b.com
2008-01-27 14:44:29.000
2
1
2
JSP
NULL
NULL
0
1
3
EJB
NULL
NULL
0
1
4
Swings
p@q.com
2008-01-27 15:12:51.000
1
1
5
AWT
NULL
NULL
0
1
6
Web Services
NULL
NULL
0
1
7
JMS
NULL
NULL
0
1
8
XML,HTML
NULL
NULL
0
1
9
Javascript
NULL
NULL
0
2
10
Oracle
NULL
NULL
0
2
11
Sql Server
NULL
NULL
0
2
12
MySQL
NULL
NULL
0
3
13
CSS
NULL
NULL
0
3
14
FLASH/DHTLML
NULL
NULL
0
4
15
Best Practices
NULL
NULL
0
4
16
Longue
NULL
NULL
0
5
17
General
NULL
NULL
0
On modifying the query to:-
SELECT ALL f.forumid,t.topicid,t.name,th.author,th.lastpostdate,(select count(threadid) from threads where topicid=t.topicid) as NoOfThreads
FROM
Forums f FULL JOIN Topics t ON f.forumid=t.forumid
FULL JOIN Threads th ON t.topicid=th.topicid
GROUP BY t.topicid,f.forumid,t.name,th.author,th.lastpostdate
HAVING th.lastpostdate=(select max(lastpostdate)from threads where topicid=t.topicid)
ORDER BY t.topicid ASC,th.lastpostdate DESC
I get the result set as below:-
forumid
topicid
name
author
lastpostdate
NoOfThreads
1
1
Java Overall
x@y.com
2008-01-27 14:48:53.000
2
1
4
Swings
p@q.com
2008-01-27 15:12:51.000
1
I want the result set as follows:-
forumid
topicid
name
author
lastpostdate
NoOfThreads
1
1
Java Overall
x@y.com
2008-01-27 14:48:53.000
2
1
2
JSP
NULL
NULL
0
1
3
EJB
NULL
NULL
0
1
4
Swings
p@q.com
2008-01-27 15:12:51.000
1
1
5
AWT
NULL
NULL
0
1
6
Web Services
NULL
NULL
0
1
7
JMS
NULL
NULL
0
1
8
XML,HTML
NULL
NULL
0
1
9
Javascript
NULL
NULL
0
2
10
Oracle
NULL
NULL
0
2
11
Sql Server
NULL
NULL
0
2
12
MySQL
NULL
NULL
0
3
13
CSS
NULL
NULL
0
3
14
FLASH/DHTLML
NULL
NULL
0
4
15
Best Practices
NULL
NULL
0
4
16
Longue
NULL
NULL
0
5
17
General
NULL
NULL
0 I want all the rows from the Forums,Topics and Threads table and the row with the maximum date (the last post date of the thread) as shown above.
The scripts for creating the tables and inserting test data is as follows in an already created database:-
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[FK__Topics__forumid__79A81403]') and OBJECTPROPERTY(id, N'IsForeignKey') = 1)
ALTER TABLE [dbo].[Topics] DROP CONSTRAINT FK__Topics__forumid__79A81403
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[FK__Threads__topicid__7C8480AE]') and OBJECTPROPERTY(id, N'IsForeignKey') = 1)
ALTER TABLE [dbo].[Threads] DROP CONSTRAINT FK__Threads__topicid__7C8480AE
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Forums]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[Forums]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Threads]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[Threads]
GO
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[Topics]') and OBJECTPROPERTY(id, N'IsUserTable') = 1)
drop table [dbo].[Topics]
GO
CREATE TABLE [dbo].[Forums] (
[forumid] [int] IDENTITY (1, 1) NOT NULL ,
[name] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[description] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL
) ON [PRIMARY]
GO
CREATE TABLE [dbo].[Threads] (
[threadid] [int] IDENTITY (1, 1) NOT NULL ,
[topicid] [int] NOT NULL ,
[subject] [varchar] (100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[replies] [int] NOT NULL ,
[author] [varchar] (100) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[lastpostdate] [datetime] NULL
) ON [PRIMARY]
GO
CREATE TABLE [dbo].[Topics] (
[topicid] [int] IDENTITY (1, 1) NOT NULL ,
[forumid] [int] NULL ,
[name] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NOT NULL ,
[description] [varchar] (255) COLLATE SQL_Latin1_General_CP1_CI_AS NULL
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[Forums] ADD
PRIMARY KEY CLUSTERED
(
[forumid]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[Threads] ADD
PRIMARY KEY CLUSTERED
(
[threadid]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[Topics] ADD
PRIMARY KEY CLUSTERED
(
[topicid]
) ON [PRIMARY]
GO
ALTER TABLE [dbo].[Threads] ADD
FOREIGN KEY
(
[topicid]
) REFERENCES [dbo].[Topics] (
[topicid]
)
GO
ALTER TABLE [dbo].[Topics] ADD
FOREIGN KEY
(
[forumid]
) REFERENCES [dbo].[Forums] (
[forumid]
)
GO
------------------------------------------------------
insert into forums(name,description) values('Developers','Developers Forum');
insert into forums(name,description) values('Database','Database Forum');
insert into forums(name,description) values('Desginers','Designers Forum');
insert into forums(name,description) values('Architects','Architects Forum');
insert into forums(name,description) values('General','General Forum');
insert into topics(forumid,name,description) values(1,'Java Overall','Topic Java Overall');
insert into topics(forumid,name,description) values(1,'JSP','Topic JSP');
insert into topics(forumid,name,description) values(1,'EJB','Topic Enterprise Java Beans');
insert into topics(forumid,name,description) values(1,'Swings','Topic Swings');
insert into topics(forumid,name,description) values(1,'AWT','Topic AWT');
insert into topics(forumid,name,description) values(1,'Web Services','Topic Web Services');
insert into topics(forumid,name,description) values(1,'JMS','Topic JMS');
insert into topics(forumid,name,description) values(1,'XML,HTML','XML/HTML');
insert into topics(forumid,name,description) values(1,'Javascript','Javascript');
insert into topics(forumid,name,description) values(2,'Oracle','Topic Oracle');
insert into topics(forumid,name,description) values(2,'Sql Server','Sql Server');
insert into topics(forumid,name,description) values(2,'MySQL','Topic MySQL');
insert into topics(forumid,name,description) values(3,'CSS','Topic CSS');
insert into topics(forumid,name,description) values(3,'FLASH/DHTLML','Topic FLASH/DHTLML');
insert into topics(forumid,name,description) values(4,'Best Practices','Best Practices');
insert into topics(forumid,name,description) values(4,'Longue','Longue');
insert into topics(forumid,name,description) values(5,'General','General Discussion');
insert into threads(topicid,subject,replies,author,lastpostdate) values (1,'About Java Tutorial',2,'a@b.com','1/27/2008 02:44:29 PM');
insert into threads(topicid,subject,replies,author,lastpostdate) values (1,'Java Basics',0,'x@y.com','1/27/2008 02:48:53 PM');
insert into threads(topicid,subject,replies,author,lastpostdate) values (4,'Swings',0,'p@q.com','1/27/2008 03:12:51 PM');
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Nov 21, 2006
Hi,
I have been having problems trying to sort this query out and would appreciate some pointers.
I have a SQL Server table 'Match' which includes the columns:
match_date datetime
age_group int
The match_date column includes both date and time values. The age_group column is an id linked to an 'Age_Group' table.
I would like the select query to retrieve the top 3 dates (not including times) and the agegroups for these dates.
For example:
The table data might include
match_date, agegroup
--------------------
10/11/2006 10:00, 1
10/11/2006 11:00, 1
10/11/2006 12:00, 1
10/11/2006 13:00, 2
03/11/2006 09:00, 3
03/11/2006 10:00, 4
03/11/2006 11:00, 5
25/10/2006 10:00, 2
20/09/2006 10:00, 5
20/09/2006 10:00, 6
I would like the SELECT to retrieve like so:
match_date, agegroup
--------------------
10/11/2006, 1
10/11/2006, 2
03/11/2006, 3
03/11/2006, 4
03/11/2006, 5
25/10/2006, 2
So the query only returns the one record for each age_group on each date for the top 3 dates.
Does anyone have any ideas? I hope I have explained it well enough!
Thanks,
Pete
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