Case Statement Within A Select Where 2 or More Instances Of The Record Exist.

Ok,
I have a data warehouse that I am pulling records from using Oracle
SQL. I have a select statement that looks like the one below. Now what
I need to do is where the astrics are **** create a case statement or
whatever it is in Oracle to say that for this record if a 1/19/2005
record exists then End_Date needs to be=1/19/2005 else get
End_Date=12/31/9999. Keep in mind that a record could have both a
1/19/2005 and 12/31/9999 instance of that account record. If 1/19
exists that takes presedent if it doesnt then 12/31/9999. The problem
is that the fields I pull from the table where the end_date is in
question change based on which date I pull(12/31/9999 being the most
recient which in some cases as you see I dont want.) so they are not
identical. This is tricky.
Please let me know if you can help.

SELECT
COLLECTOR_RESULTS.USER_ID,
COLLECTOR_RESULTS.LETTER_CODE,
COLLECTOR_RESULTS.ACCT_NUM AS ACCT_NUM,
COLLECTOR_RESULTS.ACTIVITY_DATE,
COLLECTOR_RESULTS.BEGIN_DATE,
COLLECTOR_RESULTS.COLLECTION_ACTIVITY_CODE,
COLLECTOR_RESULTS.PLACE_CALLED,
COLLECTOR_RESULTS.PARTY_CONTACTED_CODE,
COLLECTOR_RESULTS.ORIG_FUNC_AREA,
COLLECTOR_RESULTS.ORIG_STATE_NUMBER,
COLLECTOR_RESULTS.CACS_FUNCTION_CODE,
COLLECTOR_RESULTS.CACS_STATE_NUMBER,
COLLECTOR_RESULTS.STATE_POSITION,
COLLECTOR_RESULTS.TIME_OBTAINED,
COLLECTOR_RESULTS.TIME_RELEASED,
COLLECT_ACCT_SYS_DATA.DAYS_DELINQUENT_NUM,
sum(WMB.COLLECT_ACCT_SYS_DATA.PRINCIPAL_AMT)As PBal,
FROM
COLLECTOR_RESULTS,
COLLECT_ACCT_SYS_DATA,
COLLECT_ACCOUNT
WHERE
COLLECT_ACCOUNT.ACCT_NUM=COLLECT_ACCT_SYS_DATA.ACC T_NUM(+)
AND
COLLECT_ACCOUNT.LOCATION_CODE=COLLECT_ACCT_SYS_DAT A.LOCATION_CODE(+)
AND COLLECT_ACCOUNT.ACCT_NUM=COLLECTOR_RESULTS.ACCT_NU M(+)
AND COLLECT_ACCOUNT.LOCATION_CODE=COLLECTOR_RESULTS.LO CATION_CODE(+)
AND COLLECTOR_RESULTS.ACTIVITY_DATE =
to_date(''01/19/2005'',''mm/dd/yyyy'')
AND COLLECT_ACCOUNT.END_DATE = to_date(''12/31/9999'',''mm/dd/yyyy'')
AND COLLECT_ACCT_SYS_DATA.END_DATE = *****************On 20 Jan 2005 11:13:31 -0800, philipdm@.msn.com wrote:

>Ok,
>I have a data warehouse that I am pulling records from using Oracle
>SQL.

Hi philipdm,

You posted this question in a newsgroup for MS SQL Server. I doubt you'll
get any specific Oracle help here.

But if I understand your requirements correctly, I think you can solve it
using only ANSI-standard SQL: correlated subquery, group by and aggregate
functions. I assume Oracle will have no trouble running those! I'm not
sure if the NULL handling requires sppecial attention (see notes down
below).

First, let me check if I correctly understand your requirements:

> Keep in mind that a record could have both a
>1/19/2005 and 12/31/9999 instance of that account record. If 1/19
>exists that takes presedent if it doesnt then 12/31/9999.

The way I read this is: check collect_acct_sys_data for a particular
acct_num / location_code combinations. If there's a row for 1/19/2005, use
that. If there's a row for 12/31/9999 but no row for 1/19/2005, use the
12/31/9999 row. If there's no row for 1/19/2005 and no row for 12/31/9999,
use no row at all - the join will fail and the rows for the other tables
that use this acct_num / location_code combination won't be included in
the result set either.

I'd use something like the following. Note: I've used table aliasses and
converted the table and column names to lower case to improve readability;
I kept the (+) symbols you included and didn't change the format of the
to_date function calls - neither of these are known in MS SQL Server, so I
have no idea if they're right or wrong.

SELECT CR.User_ID,
... (lots of other columns)
FROM Collector_Results AS CR,
Collector_Acct_Sys_Date AS CASD,
Collect_Account AS CA
WHERE CA.Acct_Num = CASD.Acct_Num(+)
AND CA.Location_Code = CASD.Location_Code(+)
AND CA.Acct_Num = CR.Acct_Num(+)
AND CA.Location_Code = CR.Location_Code(+)
AND CR.Activity_Date = to_date(''01/19/2005'',''mm/dd/yyyy'')
AND CA.End_Date = to_date(''12/31/9999'',''mm/dd/yyyy'')
AND CASD.End_Date =
(SELECT MIN(CASD2.End_Date)
FROM Collector_Acct_Sys_Date AS CASD2
WHERE CASD2.Acct_Num = CASD.Acct_Num(+)-- Do you need the
(+) here?
AND CASD2.Location_Code = CASD.Location_Code(+)-- Do you
need the (+) here?
AND ( CASD2.End_Date = to_date(''01/19/2005'',''mm/dd/yyyy'')
OR CASD2.End_Date = to_date(''12/31/9999'',''mm/dd/yyyy'')))

Final note: if the possibility exists that no row in CASD for a given
acct_num / location_code with either of the two dates, the subquery should
return NULL; the clause "AND CASD.End_Date = (subquery)" will evaluate to
"AND CASD.End_Date = NULL", which should not be true for any value of
CASD.End_Date (not even if CASD.End_Date is NULL!!). This is how NULLS
should be treated according to ANSI standard. If Oracle treats the result
of an empty subquery or comparison to NULL differently, then you should
tweak the query to get the correct results.

Best, Hugo
--

(Remove _NO_ and _SPAM_ to get my e-mail address)sql

Case statement with multiple conditions

Obviously the below Case expression does not work. I have conditions on two
fields. If it is true then proceed.
CASE WHEN tbl.FieldA = 1 AND tbl.FieldB = NULL THEN
GETDATE()
ELSE
tbl.end_dt
END
Please Help,
Culammy bad,
Solution:
CASE WHEN su.deleted_flag = 1
THEN
CASE WHEN su.end_dt IS NULL THEN
CONVERT(VARCHAR(11), GETDATE() - 1, 101)
ELSE su.end_dt
END
ELSE
su.end_dt
END
"culam" wrote:

> Obviously the below Case expression does not work. I have conditions on t
wo
> fields. If it is true then proceed.
>
> CASE WHEN tbl.FieldA = 1 AND tbl.FieldB = NULL THEN
> GETDATE()
> ELSE
> tbl.end_dt
> END
> Please Help,
> Culam|||> Obviously the below Case expression does not work. I have conditions
> on two fields. If it is true then proceed.
> CASE WHEN tbl.FieldA = 1 AND tbl.FieldB = NULL THEN
> GETDATE()
> ELSE
> tbl.end_dt
> END
> Please Help,
> Culam
Apart from = NULL, this should work like you expect it to.
Lasse Vgsther Karlsen
http://usinglvkblog.blogspot.com/
mailto:lasse@.vkarlsen.no
PGP KeyID: 0x2A42A1C2

CASE statement with IN/OR

Hello,

I'm trying to write a query with case statement.

the condition is

when project_ref =393 then select qtn_ref in (7070000,7060000))
and when project_ref =391 and select q.qtn_ref=8700000

I need this condition in 'WHERE' statement.

I can use 2 SELECT queries using 'IF ELSE', but I woud like to find out if there's any way to use CASE so I can write 1 query.

Tring to do something like this but it doesn't work.

SELECT *

FROM table

WHERE qtn_ref = case when project_ref =393 then 7070000 or 7060000
when project_ref =391 then 8700000

Anyone can help, please?

Hi,

I just modified your Query. i dont have an SQL Installation so im not able to test the Query.

Plz Try this i hope i would solve your problem.

SELECT * FROM table
WHERE (qtn_ref = case when project_ref =393 then 7070000
when project_ref =391 then 8700000) OR
(qtn_ref = case when project_ref =393 then 7060000
when project_ref =391 then 8700000)

|||

SELECT*FROM yourTable

WHERE qtn_ref=(casewhen project_ref=393 then 7070000

when project_ref=391 then 8700000 end)OR

qtn_ref=(casewhen project_ref=393 then 7060000

when project_ref=391 then 8700000 end)

|||thanks guys. it works.|||Plese check one of them as answers!

Case Statement With Bigger than?

Hi

How can i create a case statement with a bigger and smaller than sign in it. I keep on getting an error.

Here is the piece of code i'm working on and simply enough, the idea of what i am trying to accomplish.

Code Snippet

SELECT Weight.Weight,

Height.Height,

(Weight.Weight/(Height.Height*Height.Height)) AS BMI,

CASE BMI

WHEN (BMI < 18) THEN 'Under Weight'

WHEN (BMI < 25) THEN 'Healthy Weight'

END AS 'BMI Grouping'

Any Help will be greatly appreciated

Kind Regards

Carel Greaves

Carel:

It looks to me like you have it correct; the only thing you might want to do is add an additonal line after your WHEN statements -- something like

Code Snippet

ELSE 'Over Weight'

Oh the problem is that you cannot reference this as 'BMI'; you need to write out the long version like:

Code Snippet

SELECT Weight.Weight,

Height.Height,

(Weight.Weight/(Height.Height*Height.Height)) AS BMI,

CASE BMI

WHEN ((Weight.Weight/(Height.Height*Height.Height)) < 18) THEN 'Under Weight'

WHEN ((Weight.Weight/(Height.Height*Height.Height)) < 25) THEN 'Healthy Weight'

END AS 'BMI Grouping'

Transact SQL does not have the ability to alias BMI as in your original statement as (I think) Oracle does.

|||

The "case" function has two formats. You can not use both at the same time.

case -- BMI

when BMI < 18 then 'Under Weight'

when BMI < 25 then 'Healthy Weight'

else NULL

end as 'BMI Grouping'

AMB

|||

Carel,

Expanding upon Alejandro's response, CASE works like this:

CASE {ItemToTest}

WHEN {Value} THEN [AlternativeValue}

END

or

CASE

WHEN {ItemToTest} equality {Values} THEN {AlternativeValue}

END

The second alternative has quite a bit of flexibility. Each WHEN can test different {ItemToTest}, and

{AlternativeValue} can return a different datatype that {ItemToTest}.

|||

And you are not allowed to use the Column Aliase name as expression of other column in the same select list..

You have to use the following query,

Code Snippet

SELECT Weight.Weight,

Height.Height,

(Weight.Weight/(Height.Height*Height.Height)) AS BMI,

CASE

WHEN ((Weight.Weight/(Height.Height*Height.Height)) < 18) THEN 'Under Weight'

WHEN ((Weight.Weight/(Height.Height*Height.Height)) < 25) THEN 'Healthy Weight'

END AS 'BMI Grouping'

|||Thanks, yet again i find all the answers that i'm looking for

Thanks Guys

Kind Regards

Carel Greaves

|||

You are welcome; it is always a pleasure working with you, Carel.

Case Statement With Bigger than?

Hi

How can i create a case statement with a bigger and smaller than sign in it. I keep on getting an error.

Here is the piece of code i'm working on and simply enough, the idea of what i am trying to accomplish.

Code Snippet

SELECT Weight.Weight,

Height.Height,

(Weight.Weight/(Height.Height*Height.Height)) AS BMI,

CASE BMI

WHEN (BMI < 18) THEN 'Under Weight'

WHEN (BMI < 25) THEN 'Healthy Weight'

END AS 'BMI Grouping'

Any Help will be greatly appreciated

Kind Regards

Carel Greaves

Carel:

It looks to me like you have it correct; the only thing you might want to do is add an additonal line after your WHEN statements -- something like

Code Snippet

ELSE 'Over Weight'

Oh the problem is that you cannot reference this as 'BMI'; you need to write out the long version like:

Code Snippet

SELECT Weight.Weight,

Height.Height,

(Weight.Weight/(Height.Height*Height.Height)) AS BMI,

CASE BMI

WHEN ((Weight.Weight/(Height.Height*Height.Height)) < 18) THEN 'Under Weight'

WHEN ((Weight.Weight/(Height.Height*Height.Height)) < 25) THEN 'Healthy Weight'

END AS 'BMI Grouping'

Transact SQL does not have the ability to alias BMI as in your original statement as (I think) Oracle does.

|||

The "case" function has two formats. You can not use both at the same time.

case -- BMI

when BMI < 18 then 'Under Weight'

when BMI < 25 then 'Healthy Weight'

else NULL

end as 'BMI Grouping'

AMB

|||

Carel,

Expanding upon Alejandro's response, CASE works like this:

CASE {ItemToTest}

WHEN {Value} THEN [AlternativeValue}

END

or

CASE

WHEN {ItemToTest} equality {Values} THEN {AlternativeValue}

END

The second alternative has quite a bit of flexibility. Each WHEN can test different {ItemToTest}, and

{AlternativeValue} can return a different datatype that {ItemToTest}.

|||

And you are not allowed to use the Column Aliase name as expression of other column in the same select list..

You have to use the following query,

Code Snippet

SELECT Weight.Weight,

Height.Height,

(Weight.Weight/(Height.Height*Height.Height)) AS BMI,

CASE

WHEN ((Weight.Weight/(Height.Height*Height.Height)) < 18) THEN 'Under Weight'

WHEN ((Weight.Weight/(Height.Height*Height.Height)) < 25) THEN 'Healthy Weight'

END AS 'BMI Grouping'

|||Thanks, yet again i find all the answers that i'm looking for

Thanks Guys

Kind Regards

Carel Greaves

|||

You are welcome; it is always a pleasure working with you, Carel.

case statement with an sql query statement

a case statement in VB is ment for a string or numeric expression. if i place a sql parameter query statement it shows type mismatch. what do i do??Originally posted by ONIL
a case statement in VB is ment for a string or numeric expression. if i place a sql parameter query statement it shows type mismatch. what do i do??

can you show the statement you are trying to execute? Or a better understanding of what you are after?|||ok here's the issue
i have the following: -
1. a access table: telephone_directory (fields are first name, last name, extension_no, building_name)
2. a form with menu find and sub menus "by extension number", "by first name", "by last name". ALSO another form named PF with a text box and a listbox

3. a sql parameter query as: -
cq.SQL = "PARAMETERS something1 INTEGER; SELECT * FROM TELEPHONE_DIRECTORY" & _
" WHERE LEFT(EXTENSION_NO,1) LIKE [something1] " & _
" OR LEFT(EXTENSION_NO,2) LIKE [something1] " & _
" OR LEFT(EXTENSION_NO,3) LIKE [something1] " & _
" OR LEFT(EXTENSION_NO,4) LIKE [something1] " & _
" OR LEFT(EXTENSION_NO,5) LIKE [something1] " & _
" OR LEFT(EXTENSION_NO,6) LIKE [something1] " & _
" OR EXTENSION_NO LIKE [something1] " & _
" ORDER BY EXTENSION_No; "
4. a bas file with the parameter query wherein case 1 is for extension number case 2 is for last names wherein the sql query is : -

cq.SQL = "PARAMETERS something1 text; SELECT * FROM TELEPHONE_DIRECTORY" & _
" WHERE LEFT(LAST_NAME,1)LIKE [something1] " & _
" OR LEFT(LAST_NAME,2)LIKE [something1] " & _
" OR LEFT(LAST_NAME,3)LIKE [something1] " & _
" OR LEFT(LAST_NAME,4)LIKE [something1] " & _
" OR LEFT(LAST_NAME,5)LIKE [something1] " & _
" OR LEFT(LAST_NAME,6)LIKE [something1] " & _
" OR LAST_NAME LIKE [something1] " & _
" ORDER BY LAST_NAME; "
.... and so on

5. now how do i call for the "case" in the PF form so that the text box takes the input and listbox displays result for all types of find. I am succesful with different forms for each FIND but i want to use ONLY ONE form.|||Since it's an Access database I don't know if IIf() or Switch() would help at all.sql

CASE statement with an IN

hi there,
I am trying to do this, it would simply my sql so much, but the syntax won't
parse.
DECLARE @.Tmp varchar
--@.Tmp will either be cow or pig after something done here, lets say pig for
simplification..
SET @.Tmp = 'pig'
SELECT * From Blah WHERE SomeField IN (CASE @.Tmp WHEN 1 THEN (1) WHEN 2 THEN
(1,2) END)
To explain, i have a value of @.Tmp. It will either be 'cow' or 'pig'. I want
to use one select statement but the WHERE clause changes depending on the
value of @.Tmp.
If it is cow, then I just want the clause to be WHERE SomeField IN(1), if it
is pig then I want the clause to be WHERE SomeField IN (1,2). I have tried
lots of ways, locations of @.Tmp, brackets etc, and it just wont work. Is thi
s
simply not possible or have I got the syntax wrong? it doesnt seem an
unlikely thing to want to do...
I even tried ditching the idea and doing an if and rewriting the whole
select statement depending on @.Tmp. Only problem is it is the select
statement for a cursor FOR statement, so fiddling around with that is tricky
too !!!Hi Louise
Try something like
SELECT * From Blah
WHERE ( SomeField = 1 AND @.tmp = 'cow')
OR ( SomeField = 2 AND @.tmp = 'pig')
John
"louise raisbeck" wrote:

> hi there,
> I am trying to do this, it would simply my sql so much, but the syntax won
't
> parse.
> DECLARE @.Tmp varchar
> --@.Tmp will either be cow or pig after something done here, lets say pig f
or
> simplification..
> SET @.Tmp = 'pig'
> SELECT * From Blah WHERE SomeField IN (CASE @.Tmp WHEN 1 THEN (1) WHEN 2 TH
EN
> (1,2) END)
> To explain, i have a value of @.Tmp. It will either be 'cow' or 'pig'. I wa
nt
> to use one select statement but the WHERE clause changes depending on the
> value of @.Tmp.
> If it is cow, then I just want the clause to be WHERE SomeField IN(1), if
it
> is pig then I want the clause to be WHERE SomeField IN (1,2). I have tried
> lots of ways, locations of @.Tmp, brackets etc, and it just wont work. Is t
his
> simply not possible or have I got the syntax wrong? it doesnt seem an
> unlikely thing to want to do...
> I even tried ditching the idea and doing an if and rewriting the whole
> select statement depending on @.Tmp. Only problem is it is the select
> statement for a cursor FOR statement, so fiddling around with that is tric
ky
> too !!!|||ok, that works [blush]!! thanks.
"John Bell" wrote:
> Hi Louise
> Try something like
> SELECT * From Blah
> WHERE ( SomeField = 1 AND @.tmp = 'cow')
> OR ( SomeField = 2 AND @.tmp = 'pig')
> John
> "louise raisbeck" wrote:
>|||It looks like you are going to have to construct your SQL statement in a
string variable and then use EXEC() to submit the string to the query parser
.
SET @.strSQL = 'SELECT * From Blah WHERE SomeField IN (' + @.Tmp + ')'
EXEC(@.strSQL)
HTH,
Mike
"louise raisbeck" wrote:

> hi there,
> I am trying to do this, it would simply my sql so much, but the syntax won
't
> parse.
> DECLARE @.Tmp varchar
> --@.Tmp will either be cow or pig after something done here, lets say pig f
or
> simplification..
> SET @.Tmp = 'pig'
> SELECT * From Blah WHERE SomeField IN (CASE @.Tmp WHEN 1 THEN (1) WHEN 2 TH
EN
> (1,2) END)
> To explain, i have a value of @.Tmp. It will either be 'cow' or 'pig'. I wa
nt
> to use one select statement but the WHERE clause changes depending on the
> value of @.Tmp.
> If it is cow, then I just want the clause to be WHERE SomeField IN(1), if
it
> is pig then I want the clause to be WHERE SomeField IN (1,2). I have tried
> lots of ways, locations of @.Tmp, brackets etc, and it just wont work. Is t
his
> simply not possible or have I got the syntax wrong? it doesnt seem an
> unlikely thing to want to do...
> I even tried ditching the idea and doing an if and rewriting the whole
> select statement depending on @.Tmp. Only problem is it is the select
> statement for a cursor FOR statement, so fiddling around with that is tric
ky
> too !!!|||yes that is another solution. thanks. does exec (string) have speed
implications?
"Mike Austin" wrote:
> It looks like you are going to have to construct your SQL statement in a
> string variable and then use EXEC() to submit the string to the query pars
er.
> SET @.strSQL = 'SELECT * From Blah WHERE SomeField IN (' + @.Tmp + ')'
> EXEC(@.strSQL)
> HTH,
> Mike
> "louise raisbeck" wrote:
>|||Certainly, this solution is slower than if you're able to come up with a way
to implement dynamic SQL in a fixed statement.
Another approach may be:
IF @.Tmp = 'Pig'
BEGIN
SELECT...
END
ELSE
BEGIN
SELECT...
END
"louise raisbeck" wrote:
> yes that is another solution. thanks. does exec (string) have speed
> implications?
> "Mike Austin" wrote:
>