Using A Field Alias For A CASE Statement In A GROUP BY Clause

May 20, 2004

When I created a CASE statement (This is at work, Pat:)) it is about 30-40 lines long. I gave it a name and set the name = to the case statement:

ie,

SELECT fieldname1 =
CASE
WHEN condition THEN 'blah blah'
WHEN condition THEN 'blah blah'
WHEN condition THEN 'blah blah'
ELSE thisandthat
END
, fieldname2
, fieldname3
FROM tablename1
GROUP BY CASE
WHEN condition THEN 'blah blah'
WHEN condition THEN 'blah blah'
WHEN condition THEN 'blah blah'
ELSE thisandthat
END, , fieldname2, fieldname3

etc.


The long CASE statement in my GROUP BY is awkward to me. Is this the only way to do it? I tried using the fieldname1 but it comes back as an invalid field name and asks for the "expression".

Regards,

Dave

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SQL Server 2012 :: Case Statement - How To Get Values Into Alias Extension

Oct 6, 2014

I have a bit of trouble getting values into one alias field, my code is below. I am trying to get values into the alias extension, Agent_ID is sometimes null, and so is agent_id2, however sometimes they both have values in them, and then only one of the values is every returned. When in the example below only Agent_ID (11111) is ever returned by I want both of them returned.

Agent_ID Agent_ID2
11111 22222
<code>
SELECT DISTINCT
CASE WHEN [AGENT_ID] is not null then AGENT_ID
when agent_id2 is not null then agent_id2 end as extension
FROM [AA_Helper].[dbo].[tblEmpData]
</code>

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Jan 22, 2007

I need a SQL statement that selects a specific year (@yr type int) in the "createddate" column...if this @yr is equal to 0 then I want to select ALL columns regardless of the year...This is what I have so far, but it doesnt work...SELECT * FROM tblUsersWHERE year(CreatedDate)=CASEWHEN @yr<>'0' THEN @yrELSE NOT NULLEND

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Oct 3, 2007

Hi!I want to make search engine and I have problem with query for this search. User can write username to search or text to search or both. So at first I made query for each event individually: ALTER PROCEDURE [dbo].[Show_Search_Topics]
@username varchar(200),
@search_text varchar(200),
@days int
AS
DECLARE @date DATETIME
SET @date = DATEADD(day,@days,GETDATE())
IF @username IS NOT NULL AND @search_text IS NULL
BEGIN
SELECT COUNT(dbo.forum_topics.post_user_id) AS UserPosts, forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_id,
forum_topics_1.post_current_date, forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id,
dbo.forum_kategorie.forum_kat_kolor, dbo.forum_kategorie.forum_kat_nazwa, COUNT(DISTINCT forum_topics_2.post_id) + 1 AS post_total
FROM dbo.forum_topics INNER JOIN
dbo.aspnet_Users ON dbo.forum_topics.post_user_id = dbo.aspnet_Users.uID INNER JOIN
dbo.forum_topics AS forum_topics_1 ON dbo.aspnet_Users.uID = forum_topics_1.post_user_id INNER JOIN
dbo.forum_kategorie ON forum_topics_1.post_cat_id = dbo.forum_kategorie.forum_kat_id LEFT OUTER JOIN
dbo.forum_topics AS forum_topics_2 ON forum_topics_1.post_id = forum_topics_2.post_parrent_id
GROUP BY forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_parrent_id, forum_topics_1.post_id, forum_topics_1.post_current_date,
forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id, dbo.forum_kategorie.forum_kat_kolor,
dbo.forum_kategorie.forum_kat_nazwa
HAVING (forum_topics_1.post_parrent_id = 0) AND (dbo.aspnet_Users.UserName = @username) AND (forum_topics_1.post_current_date >= @date)
ORDER BY forum_topics_1.post_stick DESC, forum_topics_1.post_current_date DESC
END
ELSE
IF @username IS NULL AND @search_text IS NOT NULL
BEGIN
SELECT COUNT(dbo.forum_topics.post_user_id) AS UserPosts, forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_id,
forum_topics_1.post_current_date, forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id,
dbo.forum_kategorie.forum_kat_kolor, dbo.forum_kategorie.forum_kat_nazwa, COUNT(DISTINCT forum_topics_2.post_id) + 1 AS post_total
FROM dbo.forum_topics INNER JOIN
dbo.aspnet_Users ON dbo.forum_topics.post_user_id = dbo.aspnet_Users.uID INNER JOIN
dbo.forum_topics AS forum_topics_1 ON dbo.aspnet_Users.uID = forum_topics_1.post_user_id INNER JOIN
dbo.forum_kategorie ON forum_topics_1.post_cat_id = dbo.forum_kategorie.forum_kat_id LEFT OUTER JOIN
dbo.forum_topics AS forum_topics_2 ON forum_topics_1.post_id = forum_topics_2.post_parrent_id
GROUP BY forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_parrent_id, forum_topics_1.post_id, forum_topics_1.post_current_date,
forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id, dbo.forum_kategorie.forum_kat_kolor,
dbo.forum_kategorie.forum_kat_nazwa
HAVING (forum_topics_1.post_parrent_id = 0) AND (forum_topics_1.post_current_date >= @date) AND (forum_topics_1.post_title LIKE '%' + @search_text + '%')
ORDER BY forum_topics_1.post_stick DESC, forum_topics_1.post_current_date DESC
END
ELSE
IF @username IS NOT NULL AND @search_text IS NOT NULL
BEGIN
SELECT COUNT(dbo.forum_topics.post_user_id) AS UserPosts, forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_id,
forum_topics_1.post_current_date, forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id,
dbo.forum_kategorie.forum_kat_kolor, dbo.forum_kategorie.forum_kat_nazwa, COUNT(DISTINCT forum_topics_2.post_id) + 1 AS post_total
FROM dbo.forum_topics INNER JOIN
dbo.aspnet_Users ON dbo.forum_topics.post_user_id = dbo.aspnet_Users.uID INNER JOIN
dbo.forum_topics AS forum_topics_1 ON dbo.aspnet_Users.uID = forum_topics_1.post_user_id INNER JOIN
dbo.forum_kategorie ON forum_topics_1.post_cat_id = dbo.forum_kategorie.forum_kat_id LEFT OUTER JOIN
dbo.forum_topics AS forum_topics_2 ON forum_topics_1.post_id = forum_topics_2.post_parrent_id
GROUP BY forum_topics_1.post_title, dbo.aspnet_Users.UserName, forum_topics_1.post_parrent_id, forum_topics_1.post_id, forum_topics_1.post_current_date,
forum_topics_1.post_stick, forum_topics_1.post_user_id, forum_topics_1.post_cat_id, dbo.forum_kategorie.forum_kat_kolor,
dbo.forum_kategorie.forum_kat_nazwa
HAVING (forum_topics_1.post_parrent_id = 0) AND (forum_topics_1.post_current_date >= @date) AND (forum_topics_1.post_title LIKE '%' + @search_text + '%') AND
(dbo.aspnet_Users.UserName = @username)
ORDER BY forum_topics_1.post_stick DESC, forum_topics_1.post_current_date DESC
END
RETURN This 3 queries are different only by Having clause. So I want to put If/Case in Having clause, but I have problem. Can anyone help me?Also I want to make paging from SQL level, so if anyone will be so helpful and make working this query with this: ALTER PROCEDURE [dbo].[Show_Search_Topics]
@username varchar(200),
@search_text varchar(200),
@days int,
@page int,
@page_size int
AS
WITH Results As
(
//QUERY)

)
SELECT * FROM Results
WHERE RowNumber BETWEEN (@page_size * @page + 1) AND (@page_size * (@page + 1))
ORDER BY forum_topics_1.post_stick DESC, forum_topics_1.post_current_date DESC
RETURN  I will be grateful :-) 

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Feb 21, 2008

Hi,
I need help to use CASE Statement within my WHERE Clause. I want to change the WHERE Clause based on my condition as following:
SELECT ...
FROM ...
WHERE  (condition)
AND       (condition)
AND       (condition)
AND       (
                    CASE Table.Category
                          WHEN 'Drinks' THEN
                               Table1.Field1 = 1 -- Problem line
                          ELSE
                               Table1.Field1 = 1 AND Table1.Field2 = 1 -- Problem line
                   END
             )
In the above case, my WHERE Clause is dependent on one of the fields in a table. If it has a certain value then only Table1.Field1 is used otherwise Table1.Field1 & Field2 come into action.
I am getting error on the mentioned line (Problem Line). Since CASE is an expression and does not execute a statement, can anyone help me to get my WHERE Clause working...
Thanks in advance...

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Aug 13, 2003

can i use case statement in where clause.
The scenario is as follow

declare @param int
select
*
from
table1
where
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column2= @param

In the above sql, if @param is '' then i don't want to include it in the where clause.I can use "like" statement for that, but i want exact value not partial value.


can i use case in where clause so that if @param is '' then i will not include in the where clause

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Can I do the following? Keep getting an error stopping at the first < of the where clause.


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set @yr=2006
set @mon=1
set @mydate='01/31/2006 23:59:59'

select 0 as DTAP, 0 as DT, 0 as TD, 0 as HIB, 0 as IPV, 0 as MMR, 0 as HEPB, 0 as _VAR, count(v.procedureKey) as FLU, 0 as PPV23, 0 as PCV7, v.chartID, max(rs1.dateService) as dateService from dbo.tbl1 v,
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where (v.chartID=rs1.chartID) and (v.procedureKey=rs1.procedureKey) and
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when @mon=2 then dateDiff(month,dateService,@myDate)<244
when @mon=3 then dateDiff(month,dateService,@myDate)<275
when @mon=4 then dateDiff(month,dateService,@myDate)<305
when @mon=5 then dateDiff(month,dateService,@myDate)<336
when @mon=6 then dateDiff(month,dateService,@myDate)<366
when @mon=7 then dateDiff(month,dateService,@myDate)<32
when @mon=8 then dateDiff(month,dateService,@myDate)<63
when @mon=9 then dateDiff(month,dateService,@myDate)<93
when @mon=10 then dateDiff(month,dateService,@myDate)<124
when @mon=11 then dateDiff(month,dateService,@myDate)<154
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Aug 10, 2004

Hello

I want to put a case statement into a where clause but it's not working. Can anybody help, or tell me a better way of doing this

Thanks very much

declare @param varchar (100)
select @param = 'mytext

select
colA
,colB
,colC
from
mytable
where
(case
when @param is null then colA = 'group'
else colA = 'single'
end)

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Mar 15, 2007

i have wrote a query which compares two tables, returning anywhere the qty is not the same in each table:

(simple ex)

Select order_no
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inner join table2
on table1.order_no = table2.order_no
group by order_no
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ELSE table1.Qty<> table2.Qty END

but how do i actually write this?

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WHERE
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r.level<=@v_level+1 and
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Line 15: Incorrect syntax near '='.

this is my query that lies on a PROC:


SELECT count(a.pEngr_Item_ID) as assembly_count FROM Engr_Item a
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b.Bill_Type=@v_Bill_Type and
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SELECT * FROM tablex

WHERE

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Aug 8, 2006

Hi all,

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SET @strTest = 'HI'

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Greetings,

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I thought about using an IF statement and creating different versions of the entire statement, however, in real-life I need to do this with four fields using four parameters (one for each field). The permutations are a little too much.

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Jun 3, 2008

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I have used the below update query. However, its updating only the first value. Like its updating AB with volume when c.Type  = ABC, similarly for CD. Its not updating based on the 2nd or the next case condition.
 
Update XYZ Set AB = a.Amt * (CASE WHEN c.Type = 'ABC'  THEN  (c.volume)
 WHEN c.TYPE = 'DEF'  THEN  (c.volume)
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 Else 0
 END),
 CD = CASE WHEN c.Type = 'MARGIN' THEN '4105.31'
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 join table3 c
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Hi guys,
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Any feedback would be appreciated


SELECT distinct
PERIOD.STARTDATE,
temp_111.EVENTTYPEID,
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then sum(temp_111.CONTRIBUTIONVALUE)
end as GST_AMOUNT,
case when temp_111.[name] not like '%GST%'
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2006-11-01 00:00:00.000NelNULL 83470.5608000000
2006-11-01 00:00:00.000NelNULL 161408.5264874810
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2006-11-01 00:00:00.000Nel16140.8526488160 161408.5264874810
2006-11-01 00:00:00.000Nel67756.8268300000 677568.2683000000
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SELECT
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p.investorid,
l.duedate,
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inner join paymentchange pc on pc.loanid = l.loanid
where p.investorid = '12345' and RateDueDate is not null
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Thanks!

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@filter2 varchar(100) = ''
AS
BEGIN
SELECT

[Code] .

What I want, is to be able to pass in a single value to filter the table, or if I pass in (at the moment a blank) for no filter to be applied to the table.

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Store     Type    Sales
11           A        1000
23       A      1980
23       B       50
5         B      560

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2)- if the store has  type A associated with it then assign A
3)- if the store has type B associated with it, then assign B.

Select Store, sum(sales), Type
from table1
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Transact-SQL Help - CASE Statement And Group By

Jul 20, 2005

I've always been mistified why you can't use a column alias in the group byclause (i.e. you have to re-iterate the entire expression in the group byclause after having already done it once in the select statement). I'mmostly a SQL hobbiest, so it's possible that I am not doing this in the mostefficient manner. Anyone care to comment on this with relation to thefollowing example (is there a way to acheive this without re-stating theentire CASE statement again in the Group By clause?):Select 'Age' =CaseWHEN(SubmittedOn >= DATEADD(dd, - 30, GETDATE())) AND (SubmittedOn <=DATEADD(dd, - 0, GETDATE()))THEN '0-30 Days Old'WHEN(SubmittedOn >= DATEADD(dd, - 60, GETDATE())) AND (SubmittedOn <=DATEADD(dd, - 31, GETDATE())) Then '31-60 Days Old'WHEN(SubmittedOn >= DATEADD(dd, - 90, GETDATE())) AND (SubmittedOn <=DATEADD(dd, - 61, GETDATE())) Then '61-90 Days Old'WHEN(SubmittedOn <= DATEADD(dd, - 91, GETDATE())) THEN '91+ Days Old'ELSE cast(SubmittedOn as varchar(22))end,max(SubmittedOn), COUNT(SCRID) AS NbrSCRsFrom SCRViewWHERE(StatusSort < 90) ANDCustomerID = 8 andUserID = 133group byCaseWHEN(SubmittedOn >= DATEADD(dd, - 30, GETDATE())) AND (SubmittedOn <=DATEADD(dd, - 0, GETDATE()))THEN '0-30 Days Old'WHEN(SubmittedOn >= DATEADD(dd, - 60, GETDATE())) AND (SubmittedOn <=DATEADD(dd, - 31, GETDATE())) Then '31-60 Days Old'WHEN(SubmittedOn >= DATEADD(dd, - 90, GETDATE())) AND (SubmittedOn <=DATEADD(dd, - 61, GETDATE())) Then '61-90 Days Old'WHEN(SubmittedOn <= DATEADD(dd, - 91, GETDATE())) THEN '91+ Days Old'ELSE cast(SubmittedOn as varchar(22))endOrder by max(submittedon) descThanks,Chad

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SQL Statement: Group By And Where Clause Do Not Display Null Rows

Jun 17, 2007


The following is a simplified version of my SQL statement. I am attempting to do a simple count(*) with two groupings and a where clause. This is Select command for a GridView. However, I am unable to display zeros. The rows are completely missing and I would greatly appreciate someone's help. I have already tried Group By All, but that, unfortunately, does not work. Here is my SQL statement:

"SELECT [GENDER], [RACE], COUNT(*) FROM [TABLE] WHERE ([COLUMNNAME] ='SOMETHING') GROUP BY [GENDER], [RACE]"



Thanks for the help in advance!

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Error In Image Field When Using CASE Statement

Dec 7, 2004

I've this Stored procedure on a SQLserver 2000 SP3:


SELECT *,CASE immagine WHEN NULL THEN 0 ELSE 1 END AS hasImage
FROM Squadre WHERE squadra = @squadra

this is a flag that returns if the image field is present or not..
i've a lot of this type of stored procedures.. but this one returns me an error..

---------------------------
Microsoft SQL-DMO (ODBC SQLState: 42000)
---------------------------
Errore 306: The text, ntext, and image data types cannot be compared or sorted, except when using IS NULL or LIKE operator.
---------------------------
OK
---------------------------

An i can't save.. why?
reme,ber that in the same Db there's other Stored like this.. the same syntax and the same field or table.. can anyone help me??

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Transact SQL :: Adding Case When Statement With Group By Query Doesn't Aggregate Records

Aug 28, 2015

I have a a Group By query which is working fine aggregating records by city.  Now I have a requirement to focus on one city and then group the other cities to 'Other'.  Here is the query which works:

Select [City]= CASE WHEN [City] = 'St. Louis' THEN 'St. Louis' ELSE 'Other Missouri City' END, SUM([Cars]) AS 'Total Cars' 
From [Output-MarketAnalysis]
Where [City] IN ('St. Louis','Kansas City','Columbia', 'Jefferson City','Joplin') AND [Status] = 'Active'
Group by [City]

Here is the result:

St. Louis 1000
Kansas City 800
Columbia 700
Jefferson City 650
Joplin 300

When I add this Case When statement to roll up the city information it changes the name of the city to 'Other Missouri City' however it does not aggregate all Cities with the value 'Other Missouri City':

Select [City]= CASE WHEN [City] = 'St. Louis' THEN 'St. Louis' ELSE 'Other Missouri City' END, SUM([Cars]) AS 'Total Cars' 
From [Output-MarketAnalysis]
Where [City] IN ('St. Louis','Kansas City','Columbia', 'Jefferson City','Joplin') AND [Status] = 'Active'
Group by [City]

Here is the result:

St. Louis 1000
Other Missouri City 800
Other Missouri City 700
Other Missouri City 650
Other Missouri City 300

What I would like to see is a result like:

St. Louis 1000
Other Missouri City 2450

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Include ID Field In GROUP BY Statement

May 15, 2007

I've got a query where i need to return a max value based on a select but one of the fields i need to return in the results is the records primary key ID No. This messes up the MAX bit and means that all results are returned, not just the max one.
 The query i'm using is very long so i've simplified what i mean by the example below. Say i have a table 'Fruits':
ID      FruitName      Cost1       Apple             0.452       Apple             0.633       Apple             0.524       Pear              0.895       Pear             0.83
And run the query:
select max(Cost),FruitName From Fruitsgroup by FruitName
It'll correctly return:
FruitName      CostApple             0.63Pear              0.89
Now i need the ID also returned by my query so i go:
select max(Cost),FruitName,ID From Fruitsgroup by FruitName,ID
This doesnt return the above results with the ID appended to it, it instead returns:
ID      FruitName      Cost1       Apple             0.452       Apple             0.633       Apple             0.524       Pear              0.895       Pear             0.83
As the ID is always distinct and therefore messes up the grouping. How in this instance would i return the correct result of:
ID      FruitName      Cost2       Apple             0.634       Pear              0.89
 Thanks.

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SQL Server 2012 :: Case Statement - Populate Field Names In Table

Apr 9, 2014

Is this a correct syntax to populate a field name PHONES in my CUSTOMERS TABLE

case when(d.phone = (SELECT phone from CALLS where exists(select home_phone, mobile, toll_free from CALLS2) Then 1 END 'PHONES'

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Using Case Statement To Determine Order By Field And Direction (asc Or Desc) When Using Row_number

Aug 21, 2007

I am trying to order by the field and direction as provided by input parameters @COLTOSORTBY and @DIR while using a CTE and assigning Row_Number, but am running into syntax errors.

Say I have a table called myTable with columns col1,col2,col3,

Here's what I'm trying to do

with myCTE AS
(
Select
col1
,col2
,col3
,row_number() over (order by
case when(@DIR = 'ASC') then


case when @COLTOSORTBY='col1' then col1 asc
when @COLTOSORTBY='col2' then col2 asc
else col3 asc
end
else

case when @COLTOSORTBY='col1' then col1 desc
when @COLTOSORTBY='col2' then col2 desc
else col3 desc
end
end
from myTable
)



Please let me know what i can do with minimal code repetition and achive my goal of dynamically sorting column and direction. I do not want to use dynamic SQL under any circumstance.

Thanks.

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CASE Alias In WHERE

Jul 20, 2005

Hello,I found members of this group very helpful for my last queries.Have one problem with CASE. I can use the column name alias in Order By Clausebut unable to use it in WHERE CLAUSE.PLS TELL ME IF IT IS POSSIBLE TO USE IT IN WHERE CLAUSE AND SOME ALTERNATIVE.QUERY:SELECTM.SECS =CASEWHEN NO_OF_SEC IS NULL THEN -1WHEN NO_OF_SEC =0 THEN 1ELSE NO_OF_SECENDFROM DOWNLOAD_MASTER MWHERE M.SECS < 100ORDER BY M.SECSHoping for a immediate reply.thanks in advance

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Referencing An Alias In A Where Clause

Jun 1, 2007

I have the following data set - there is more to it than whats below, I just made it easier to read and highlight my problem!



SELECT LEFT(actv.ProjID, 4) AS proj, actv.Activity, actv.TotalExpensesLB, actv.PADM
FROM dbo.xtbl_MERActv actv
WHERE LEFT(actv.projID,4) = @project OR actv.PADM = @PADM



What I want to do is have the user enter a 4 digit number (@project) which will correspond to LEFT(actv.ProjID, 4). The way it is now, if the user enters a 4 digit number, no records are returned. If the user enters a 6 digit number ( the real length of the projID), then it runs correctly and I get the records I want.



I have tried to use the alias 'proj' in the where statement, but I get an error message that it is an invalid column name.



Where am I going wrong?



Thanks in advance!

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