Case, decode functions

Dear All,
Im having the table like
the following,
i need ther report like if i give role ,region and segment mean then i need onmenuid 2 alone.
if input is role and region alone the i need those combinations result alone .
if the input is role alone thatn i need that combinations menu id.
MENUID     ROLE     REGION      SEGMENT
13
27     Account Manager
29     Account Manager
1     Account Manager
2     Account Manager SOUTH
2     COO     EAST      Corporate
Thanks In Advance,
839083

You posted in wrong forum.
Please post at PL/SQL
Hope this helps..
If someone's response is helpful or correct, please mark it accordingly.

Similar Messages

SQL Expression in decode function or case statement?

Can I put SQL expressions in decode function or case statement?
For example,
select le.profile, decode( select count(1) from profile_data where NAME= 'XXXX_AFTER' and object_id = le.profile, 0, 'N', 'Y')
from element le;
or
select le.profile, case WHEN ( select count(1) from profile_data where NAME= 'XXXX_AFTER' and object_id = le.profile) = 0 THEN 'N'
ELSE 'Y'
from element le;
None of the above work.
Can anyone tell me how to make it work?
Is there any workaround?
Thanks,
J

You simply needed and END to your CASE statement;
SQL> with profile_data as (
   select 'XXXX_AFTER' name, 1 object_id from dual),
     element as (
   select 1 profile from dual union all
   select 2 from dual)
select le.profile,
   case WHEN ( select count(1) from profile_data where NAME= 'XXXX_AFTER' and object_id = le.profile) = 0
   THEN 'N'
   ELSE 'Y'
   END new_col
from element le
   PROFILE N
         1 Y
         2 N

Case statement and Decode function both are not working in Select cursor.

I have tried both the Case statement and Decode function in Select cursor, but both the things are not working. On the other hand both the things work in just select statement.
See the first column in select (PAR_FLAG), I need to have this evaluated along with other fields. Can you please suggest some thing to make this work. And also I would like to
know the reason why decode is not working, I heard some where Case statement do not work with 8i.
Author : Amit Juneja
Date : 06/20/2011
Description:
Updates the Diamond MEMBER_MASTER table with the values from
INC.MEM_NJ_HN_MEMBER_XREF table.
declare
rec_cnt number(12) := 0;
commit_cnt number(4) := 0;
cursor select_cur is
Select DECODE(1,
(Select 1
from hsd_prov_contract R
where R.seq_prov_id = PM.seq_prov_id
and R.line_of_business = H.line_of_business
and R.PCP_FLAG = 'Y'
and R.participation_flag = 'P'
and SYSDATE between R.EFFECTIVE_DATE AND
NVL(R.TERM_DATE,
TO_DATE('31-DEC-9999', 'DD-MON-YYYY'))),
'Y',
'N') PAR_FLAG,
H.SEQ_ELIG_HIST,
H.SEQ_MEMB_ID,
H.SEQ_SUBS_ID,
H.SUBSCRIBER_ID,
H.PERSON_NUMBER,
H.EFFECTIVE_DATE,
H.TERM_DATE,
H.TERM_REASON,
H.RELATIONSHIP_CODE,
H.SEQ_GROUP_ID,
H.PLAN_CODE,
H.LINE_OF_BUSINESS,
H.RIDER_CODE_1,
H.RIDER_CODE_2,
H.RIDER_CODE_3,
H.RIDER_CODE_4,
H.RIDER_CODE_5,
H.RIDER_CODE_6,
H.RIDER_CODE_7,
H.RIDER_CODE_8,
H.MEDICARE_STATUS_FLG,
H.OTHER_STATUS_FLAG,
H.HIRE_DATE,
H.ELIG_STATUS,
H.PREM_OVERRIDE_STEP,
H.PREM_OVERRIDE_AMT,
H.PREM_OVERRIDE_CODE,
H.SEQ_PROV_ID,
H.IPA_ID,
H.PANEL_ID,
H.SEQ_PROV_2_ID,
H.SECURITY_CODE,
H.INSERT_DATETIME,
H.INSERT_USER,
H.INSERT_PROCESS,
H.UPDATE_DATETIME,
H.UPDATE_USER,
H.UPDATE_PROCESS,
H.USER_DEFINED_1,
H.SALARY,
H.PEC_END_DATE,
H.REASON_CODE,
H.PEC_WAIVED,
H.BILL_EFFECTIVE_FROM_DATE,
H.BILLED_THRU_DATE,
H.PAID_THRU_DATE,
H.SUBSC_DEPT,
H.SUBSC_LOCATION,
H.USE_EFT_FLG,
H.BENEFIT_START_DATE,
H.SEQ_ENROLLMENT_RULE,
H.MCARE_RISK_ACCRETION_DATE,
H.MCARE_RISK_DELETION_DATE,
H.MCARE_RISK_REFUSED_DATE,
H.COMMENTS,
H.USER_DEFINED_2,
H.USER_DEFINED_3,
H.RATE_TYPE,
H.PCPAA_OCCURRED,
H.PRIVACY_ON,
H.PCP_CHANGE_REASON,
H.SITE_CODE,
H.SEQ_SITE_ADDRESS_ID,
PM.seq_prov_id rendered_prov
from hsd_member_elig_history H,
INC.PCP_REASSIGN_RPRT_DATA P,
hsd_prov_master PM
where P.subscriber_id = H.subscriber_id
and P.rendered_pcp = PM.provider_ID
and H.elig_status = 'Y'
and (H.term_date is NULL or H.term_date >= last_day(sysdate))
order by H.Seq_memb_id;
begin
for C in select_cur loop
rec_cnt := rec_cnt + 1;
update hsd_member_elig_history
set term_date = TRUNC(SYSDATE - 1),
term_reason = 'PCPTR',
update_datetime = SYSDATE,
update_user = USER,
update_process = 'TD33615'
where seq_elig_hist = C.seq_elig_hist
and seq_memb_id = C.seq_memb_id;
INSERT INTO HSD_MEMBER_ELIG_HISTORY
(SEQ_ELIG_HIST,
SEQ_MEMB_ID,
SEQ_SUBS_ID,
SUBSCRIBER_ID,
PERSON_NUMBER,
EFFECTIVE_DATE,
TERM_DATE,
TERM_REASON,
RELATIONSHIP_CODE,
SEQ_GROUP_ID,
PLAN_CODE,
LINE_OF_BUSINESS,
RIDER_CODE_1,
RIDER_CODE_2,
RIDER_CODE_3,
RIDER_CODE_4,
RIDER_CODE_5,
RIDER_CODE_6,
RIDER_CODE_7,
RIDER_CODE_8,
MEDICARE_STATUS_FLG,
OTHER_STATUS_FLAG,
HIRE_DATE,
ELIG_STATUS,
PREM_OVERRIDE_STEP,
PREM_OVERRIDE_AMT,
PREM_OVERRIDE_CODE,
SEQ_PROV_ID,
IPA_ID,
PANEL_ID,
SEQ_PROV_2_ID,
SECURITY_CODE,
INSERT_DATETIME,
INSERT_USER,
INSERT_PROCESS,
UPDATE_DATETIME,
UPDATE_USER,
UPDATE_PROCESS,
USER_DEFINED_1,
SALARY,
PEC_END_DATE,
REASON_CODE,
PEC_WAIVED,
BILL_EFFECTIVE_FROM_DATE,
BILLED_THRU_DATE,
PAID_THRU_DATE,
SUBSC_DEPT,
SUBSC_LOCATION,
USE_EFT_FLG,
BENEFIT_START_DATE,
SEQ_ENROLLMENT_RULE,
MCARE_RISK_ACCRETION_DATE,
MCARE_RISK_DELETION_DATE,
MCARE_RISK_REFUSED_DATE,
COMMENTS,
USER_DEFINED_2,
USER_DEFINED_3,
RATE_TYPE,
PCPAA_OCCURRED,
PRIVACY_ON,
PCP_CHANGE_REASON,
SITE_CODE,
SEQ_SITE_ADDRESS_ID)
values
(hsd_seq_elig_hist.nextval,
C.SEQ_MEMB_ID,
C.SEQ_SUBS_ID,
C.SUBSCRIBER_ID,
C.PERSON_NUMBER,
trunc(SYSDATE),
C.TERM_DATE,
C.TERM_REASON,
C.RELATIONSHIP_CODE,
C.SEQ_GROUP_ID,
C.PLAN_CODE,
C.LINE_OF_BUSINESS,
C.RIDER_CODE_1,
C.RIDER_CODE_2,
C.RIDER_CODE_3,
C.RIDER_CODE_4,
C.RIDER_CODE_5,
C.RIDER_CODE_6,
C.RIDER_CODE_7,
C.RIDER_CODE_8,
C.MEDICARE_STATUS_FLG,
C.OTHER_STATUS_FLAG,
C.HIRE_DATE,
C.ELIG_STATUS,
C.PREM_OVERRIDE_STEP,
C.PREM_OVERRIDE_AMT,
C.PREM_OVERRIDE_CODE,
C.SEQ_PROV_ID,
C.IPA_ID,
C.PANEL_ID,
C.SEQ_PROV_2_ID,
C.SECURITY_CODE,
SYSDATE,
USER,
'TD33615',
SYSDATE,
USER,
'TD33615',
C.USER_DEFINED_1,
C.SALARY,
C.PEC_END_DATE,
C.REASON_CODE,
C.PEC_WAIVED,
C.BILL_EFFECTIVE_FROM_DATE,
C.BILLED_THRU_DATE,
C.PAID_THRU_DATE,
C.SUBSC_DEPT,
C.SUBSC_LOCATION,
C.USE_EFT_FLG,
C.BENEFIT_START_DATE,
C.SEQ_ENROLLMENT_RULE,
C.MCARE_RISK_ACCRETION_DATE,
C.MCARE_RISK_DELETION_DATE,
C.MCARE_RISK_REFUSED_DATE,
C.COMMENTS,
C.USER_DEFINED_2,
C.USER_DEFINED_3,
C.RATE_TYPE,
C.PCPAA_OCCURRED,
C.PRIVACY_ON,
C.PCP_CHANGE_REASON,
C.SITE_CODE,
C.SEQ_SITE_ADDRESS_ID);
commit_cnt := commit_cnt + 1;
if (commit_cnt = 1000) then
dbms_output.put_line('Committed updates for 1000 records.');
commit;
commit_cnt := 0;
end if;
end loop;
commit;
dbms_output.put_line('Total number of MEMBER_ELIG_HISTROY records inserted : ' ||
rec_cnt);
exception
when others then
raise_application_error(-20001,
'An error was encountered - ' || sqlcode ||
' -error- ' || sqlerrm);
end;

user10305724 wrote:
I have tried both the Case statement and Decode function in Select cursor, but both the things are not working. Please define what you mean by not working even if your computer screen is near the internet we can't see it.
You should also look at the FAQ about how to ask a question
SQL and PL/SQL FAQ
Particularly *9) Formatting with {noformat}{noformat} Tags* and posting your version.
know the reason why decode is not working, I heard some where Case statement do not work with 8i.
Does this mean you are using 8i? Then scalar sub queries - selects within the select list, are not supported, along with CASE in PL/SQL.
Select DECODE(1,
* (Select 1
from hsd_prov_contract R
where R.seq_prov_id = PM.seq_prov_id
and R.line_of_business = H.line_of_business
and R.PCP_FLAG = 'Y'
and R.participation_flag = 'P'
and SYSDATE between R.EFFECTIVE_DATE AND
NVL(R.TERM_DATE,
TO_DATE('31-DEC-9999', 'DD-MON-YYYY')))*,
'Y',
'N') PAR_FLAG,
>
exception
when others then
raise_application_error(-20001,
'An error was encountered - ' || sqlcode ||
' -error- ' || sqlerrm);
http://tkyte.blogspot.com/2008/01/why-do-people-do-this.html

Logical Operations in SQL decode function ?

Hi,
Is it possible to do Logical Operations in SQL decode function
like
'>'
'<'
'>='
'<='
'<>'
not in
in
not null
is null
eg...
select col1 ,order_by,decode ( col1 , > 10 , 0 , 1)
from tab;
select col1 ,order_by,decode ( col1 , <> 10 , 0 , 1)
from tab;
select col1 ,order_by,decode ( col1 , not in (10,11,12) , 0 , 1)
from tab;
select col1 ,order_by,decode ( col1 ,is null , 0 , 1)
from tab;
Regards,
infan
Edited by: user780731 on Apr 30, 2009 12:07 AM
Edited by: user780731 on Apr 30, 2009 12:07 AM
Edited by: user780731 on Apr 30, 2009 12:08 AM
Edited by: user780731 on Apr 30, 2009 12:08 AM
Edited by: user780731 on Apr 30, 2009 12:09 AM

example:
select col1 ,order_by,case when col1 > 10 then 0 else 1 end
from tab;
select col1 ,order_by,case when col1 <> 10 then 0 else 1 end
from tab;
select col1 ,order_by,case when col1 not in (10,11,12) then 0 else 1 end
from tab;As for testing for null, decode handles that by default anyway so you can have decode or case easily..
select col1 ,order_by,decode (col1, null , 0 , 1)
from tab;
select col1 ,order_by,case when col1 is null then 0 else 1 end
from tab;

Problem using DECODE() function with a Query of Queries

I
posted
on my blog about an issue I was having trying to use the PL/SQL
DECODE() function with a Coldfusion Query of Queries. This function
works fine when you query a database for information. However, when
you query another query, it seems that CF doesn't recognize it. I
got errors stating that it found a left parenthesis where it
expected a FROM key word. Here is a simplified version of what I am
trying to do:
quote:

<cfscript>
qOriginal = queryNew("Name,Email,CountryCode",
"VarChar,VarChar,VarChar");
newRow = queryAddRow(qOriginal, 5);
querySetCell(qOriginal, "Name", "Joe", 1);
querySetCell(qOriginal, "Email", "[email protected]", 1);
querySetCell(qOriginal, "CountryCode", "AMER", 1);
querySetCell(qOriginal, "Name", "Sally", 2);
querySetCell(qOriginal, "Email", "[email protected]", 2);
querySetCell(qOriginal, "CountryCode", "AMER", 2);
querySetCell(qOriginal, "Name", "Bob", 3);
querySetCell(qOriginal, "Email", "[email protected]", 3);
querySetCell(qOriginal, "CountryCode", "ASIA", 3);
querySetCell(qOriginal, "Name", "Mary", 4);
querySetCell(qOriginal, "Email", "[email protected]", 4);
querySetCell(qOriginal, "CountryCode", "EURO", 4);
querySetCell(qOriginal, "Name", "John", 5);
querySetCell(qOriginal, "Email", "[email protected]", 5);
querySetCell(qOriginal, "CountryCode", "EURO", 5);
</cfscript>
<cfquery name="qCountries" dbtype="query">
SELECT DISTINCT(CountryCode) AS CountryCode,
DECODE(states, "AMER", "North America & Canada",
"EURO", "Europe & Africa", "ASIA", "Japan &
Asia","") CountryName
FROM qOriginal
ORDER BY CountryCode
</cfquery>
<cfdump var="#qCountries#">

So running this returned the following error:
Query Of Queries syntax error.
Encountered "(. Incorrect Select Statement, Expecting a
'FROM', but encountered '(' instead, A select statement should have
a 'FROM' construct.
Does anybody know why this doesn't work? Is it just not
supported? Please note that I have also tried to use the CASE()
function instead of DECODE() and that resulted in basically the
same error. For now I an looping over my distinct query with a
switch statement and manually loading a new query with the data how
I want it. But it would be a lot cleaner and less code to have the
DECODE() to work. Thx!

DECODE() is an Oracle function, not generic SQL. Q-of-Q is a
very limited subset of SQL and lacks many functions and clauses
available in standard SQL, especially what you may be used to using
in your particular RDBMS.
See
Query
of Queries user guide
Phil

Error while replacing IF statements with DECODE function in procedure

Hi All,
I have created a procedure which has nested IF statements. Now I want to replace the IF statements with DECODE functions to improve performance.
Procedure:
IF (var_int_sev = '0')
THEN
var_sev := '2';
ELSE
SELECT sev
INTO var_int_sev
FROM errorconfig
WHERE errorcode = var_errorcode;
var_sev := var_int_sev;
END IF;
I converted the above IF statement into DECODE function as mentioned below:
var_Sev := DECODE(var_int_sev,0,2,SELECT severity FROM errorconfig WHERE errorcode=var_ErrorCode)
But it throws below error at the select statement used inside DECODE.
Error(58,51): PLS-00103: Encountered the symbol "SELECT" when expecting one of the following: ( - + case mod new not null others <an identifier> <a double-quoted delimited-identifier> <a bind variable> avg count current exists max min prior sql stddev sum variance execute forall merge time timestamp interval date <a string literal with character set specification> <a number> <a single-quoted SQL string> pipe <an alternatively-quoted string literal with character set specification> <an alternativ
Can someone help me in converting the IF to DECODE in the above case. Also how can we use a select statement inside decode.

instead of trying to rewrite all your code and hoping that the performance will be better, it's a better option to investigate and find out which part of your application is slow
read this:
When your query takes too long ...

How to use Decode Function in Webi / Designer - BOE XI 3.1

Hi All,
I have a SQL query which needs to include in the webi report.
Below is the query :
SELECT
SECURITY.SEC_CUSIP_NO "CUSIP",
SECURITY.STY_SEC_TY_CD "SECURITY TYPE",
SECURITY.SEC_DERIVED_DESC_TX "SECURITY DESCRIPTION",
SECURITY.sec_dep_teleg_de "FED DESCRIPTION",
SEC_STND_PR "STANDARD/FACTORED PRICE",
SEC_STND_PR_EFF_DT "STANDARD/FACTORED PRICE Date",
SECURITY.SEC_YIELD_PR "YIELD PRICE",
SECURITY.SEC_YIELD_PR_DT "YIELD RICE EFFECTIVE DATE",
STND_PR_VND_VENDOR_CD "PRICE SOURCE",
SEC_MATURITY_DT "MATURITY DATE",
SEC_ISSUE_DT "ISSUE DATE",
             CASE WHEN SECURITY.STY_SEC_TY_CD IN ('BA','CD','CDD','CDE','CDM','CDV','CP','CPD') THEN
                (position.PSN_AVAIL_PAR_VL + position.PSN_COLLAT_PAR_VL) * (SECURITY.SEC_STND_PR) / 100
             ELSE
                (position.PSN_AVAIL_PAR_VL + position.PSN_COLLAT_PAR_VL) * ( ( SECURITY.SEC_YIELD_PR * DECODE (SECURITY.SEC_PRIN_FT, 0, 1, SECURITY.SEC_PRIN_FT))) / 100
                * DECODE(SECURITY.STY_SEC_TY_CD, 'AMP', DECODE(NVL(SECURITY.SEC_MULTIPLIER_UNIT_VL,0), 0, 1, SECURITY.SEC_MULTIPLIER_UNIT_VL), 'MMP', DECODE(NVL(SECURITY.SEC_MULTIPLIER_UNIT_VL,0), 0, 1, SECURITY.SEC_MULTIPLIER_UNIT_VL), 'AMPT', DECODE(NVL(SECURITY.SEC_MULTIPLIER_UNIT_VL,0), 0, 1, SECURITY.SEC_MULTIPLIER_UNIT_VL), 1 )
             END
        ) "MARKET VALUE"
FROM SECURITY SECURITY
   ,   position position
WHERE STND_PR_VND_VENDOR_CD = 'VT'
AND SEC_MATURITY_DT > SYSDATE-1
and SECURITY.sec_sys_id=position.sec_sys_id
I could create a report which has selected objects and defined where condition from the above query. I have also created a variable for 'when' & 'then' condition but stuck at else part which contains 'DECODE' function.
Please suggestions how to write the same at the report or designer level.
Thanks,
Rameez Shaikh

Hi Rameez,
Looking at the query you can create the object directly in the universe, either create two objects one for inner decode and use it in outer case logic. In report it is nothing but nested if logic. For eg. If(a=b;1;(if(a=c;2;3))
Thanks
Gaurav

BLOB in DECODE function

Hi All,
I am new to sql. I want to use decode for BLOB datatype. For this i written a query like below.
Here user_data is of type BLOB.
select DECODE(length(user_data), 0, null, file_data) user_data from user_table;
I have tried the other way by using case like below. Its worked fine
select
CASE
WHEN LENGTH(user_data )=0
THEN NULL
ELSE user_data
END user_data from user_table;
What i made wrong in the first query?
Thanks
Jimmi

>
Its just a wrong typo
>
Thanks.
The problem is that this decode
select DECODE(length(user_data), 0, null, file_data) user_data from user_table; expects you to return a number and you are returning a BLOB.
Were you getting 'ORA-00932: inconsistent datatypes: expected BLOB got NUMBER'?
See the DECODE function in the SQL doc
http://docs.oracle.com/cd/B28359_01/server.111/b28286/functions042.htm

Converting Decode function in OBIEE

Hi Guru's
we are converting some BO reports to OBIEE and need to convert Decode function
Below is the Decode function they are using:
Decode ( sign(nvl(BOOKINGS_DATA_UDTC.qty_shipped,0)), 0,decode(BOOKINGS_DATA_UDTC.DELIVERY_NUMBER, 0,decode(BOOKINGS_DATA_UDTC.Schd_Ship_date_fk,to_date('1/1/1990','mm/dd/yyyy'),'Next Month Backlog',decode(sign(nvl(BOOKINGS_DATA_UDTC.Schd_Ship_date_fk, '01-JAN-90') -PAR.PAR_DATE), 1, 'Next Month Backlog', 'Current month will ship')) ,'Awaiting for collection') ,'MTD Shipped')
i have tried converting into case :
case when sign(IFNULL("BOOKINGS_DATA_UDTC"."Qty Shipped",0)) = 0 then (case when "BOOKINGS_DATA_UDTC"."Delivery Number" = 0 then (case when "BOOKINGS_DATA_UDTC"."SCHD_SHIP_DATE_FK" = '01-JAN-1990' then 'Next Month Backlog' else (case when Timestampdiff(SQL_TSI_DAY, cast('@{ParDate}{28-DEC-2012}' as Date),(case when "BOOKINGS_DATA_UDTC"."SCHD_SHIP_DATE_FK" IS NULL then CAst('01-JAN-1990' as DATE) else "BOOKINGS_DATA_UDTC"."SCHD_SHIP_DATE_FK" end)) > 1 then 'Next Month Backlog' else 'Current Month Will Ship' end) end) else 'Awaiting For Collection' end) else 'MTD Shipped' end
But it is not workign as expected.
Can some one please help me with this.
Thanks,

you can achieve it by using CASE WHEN condition END function in obiee. nested case also supported by obiee.
check the below link Decode Join Condition in OBIEE RPD
Thanks
Jay.
Edited by: Jay on Apr 3, 2012 12:56 PM

How to use a decode function

I want to use the following with decode, recently started on BODS.
Can you please provide the steps to use decode function
in source tabke fieldname is ordid and in target fieldname is Orderid
decode(Order_ID = 1709,lpad(Order_ID,7,'700'),Order_ID)
thank you very much for the helpful i

1) In the mapping tab of target column, click on Functions, select Miscellaneous Functions category, you can find decode function in it. Lpad can be found in String functions category.
OR
2) You can directly script this or paste this code at the mapping tab. In this case, remove the Order_ID from the script wherever used, drag and drop this column from the input schema of Query transform to avoid the syntax error.
Regards,
Suneer

Using Like Operator in a decode function

Hi,
I am trying to find out if I can use the like operator in a decode function
like:
select decode(1234,like '%123%','123 is a match') from dual;
this reults in error ORA-00936: missing expression
is there any way to make this work?
thank you

SQL> ed
Wrote file afiedt.buf
1 WITH tbl AS (SELECT '201aaa' dt FROM DUAL UNION ALL
2               SELECT '123bbb' dt FROM DUAL UNION ALL
3               SELECT '567ccc' dt FROM DUAL UNION ALL
4               SELECT 'ab123ddd' dt FROM DUAL
5               )
6 SELECT dt,CASE WHEN dt like '%123%' THEN 'Match'
7         ELSE 'Not Matched'
8         END With_case
9        ,DECODE(REGEXP_SUBSTR(dt,'123'),NULL,'Not Match','Match')   With_Regexp
10        ,DECODE(INSTR(dt,'123'),0,'Not Match','Match') With_Instr
11        ,DECODE(REPLACE(dt,'123'),dt,'Not Match','Match') With_Replace
12* FROM tbl
SQL> /
DT       WITH_CASE   WITH_REGE WITH_INST WITH_REPL
201aaa   Not Matched Not Match Not Match Not Match
123bbb   Match       Match     Match     Match
567ccc   Not Matched Not Match Not Match Not Match
ab123ddd Match       Match     Match     MatchEdited by: Saubhik on Jul 26, 2010 5:24 AM
Edited by: Saubhik on Jul 26, 2010 5:40 AM
Edited by: Saubhik on Jul 26, 2010 5:40 AM

How to use DECODE function in Exspression?

Hi,
Can we use DECODE in Expression?
I'm trying to use DECODE function but there is an error during the validation. But when i validate the mapping, it is successfully compiled but it is failed during deployment.
But if I use CASE instead of DECODE, it works fine.
Can we use DECODE in OWB???
Thanks
Raj

Hi,
In OWB 10gR2, if your are using only one DECODE in an expression, it's working. The package will compile when deploying the mapping. OWB will replace the DECODE by a CASE.
But when you are using nested decode in an expression ( for example : decode(col1, 1, 'M', decode(col2, 'Madame', 'Mme', null)) ) only the first one is replaced by a case at deployment.
In ROW_BASED mode, text of the expression is used outside of an sql statement and deployment will fails with "PLS-00204: function or pseudo-column 'DECODE' may be used inside a SQL statement only."
If operating mode for the mapping is set to SET_BASED, it's working because the expression is used in an sql statement.
I have logged a SR in metalink for this issue and a bug is opened (bug 5414112).
But I agree with you, it's better to use case statement.
Bernard

Decode Function Help

Hi,
I am new to Oracle Development.
MY Requirement:
I need to populate a column 'ISMSG' with YES / NO based on the following condition
When code = 'S' or 'O'......the column 'ISMSG' should display YES else NO..
ie output should be like
CODE ISMSG
A NO
S YES
S YES
O YES
My code for Decode function:
CASE
WHEN c.code = 'S' THEN decode( c.code, 'S','YES','NO')
WHEN c.code = 'O' THEN decode( c.code, 'O','YES','NO')
END ISMSG,
Is my code correct? If so is this the best way to do it?
If not please correct the code.
Is there an efficient way to do it?
Thanks in advance.

Hi,
You can use either CASE or DECODE for that; there's no need to use both.
Using CASE:
SELECT c.code
,     CASE
         WHEN c.code IN ('S', '0') THEN 'YES'
                                           ELSE 'NO'
     END     AS ismsg
FROM    table_x   c;Using DECODE:
SELECT c.code
,     DECODE ( c.code
            , 'S'      , 'YES'
            , '0'      , 'YES'
                          'NO'
            )          AS ismsg
FROM    table_x   c;I suggest you forget about DECODE, and always use CASE, at least while you're just starting out.
CASE can do anything that DECODE can do. There are a few, simple situations where DECODE is a little shorter than CASE, and therefore a little clearer, but only a little, and, as I said, these are only simple situations, and CASE is clear enough in them.
DECODE is never much shorter or clearer than CASE. The converse is not true: there are many situations where CASE is much, much shorter and clearer than DECODE.

Using decode function without negative values

Hi friends
I am using oracle 11g
I have at doubt regarding the following.
create table Device(Did char(20),Dname char(20),Datetime char(40),Val char(20));
insert into Device values('1','ABC','06/13/2012 18:00','400');
insert into Device values('1','abc','06/13/2012 18:05','600');
insert into Device values('1','abc','06/13/2012 18:55','600');
insert into Device values('1','abc','06/13/2012 19:00','-32768');
insert into Device values('1','abc','06/13/2012 19:05','800');
insert into Device values('1','abc','06/13/2012 19:10','600');
insert into Device values('1','abc','06/13/2012 19:15','900');
insert into Device values('1','abc','06/13/2012 19:55','1100');
insert into Device values('1','abc','06/13/2012 20:00','-32768');
insert into Device values('1','abc','06/13/2012 20:05','-32768');
Like this I am inserting data into table for every 5 minutes Here i need the result like
output:
Dname 18:00 19:00 20:00
abc 400 -32768 -32768
to retrieve this result i am using decode function
SELECT Dname,
MAX(DECODE ( rn , 1,val )) h1,
MAX(DECODE ( rn , 2, val )) h2,
FROM
(SELECT Dname,Datetime,row_number() OVER
(partition by Dname order by datetime asc) rn FROM Device
where substr(datetime,15,2)='00' group by Dname.
According to above data expected result is
Dname 18:00 19:00 20:00
abc 400 600(or)800 1100
This means I dont want to display negative values instead of that values i want to show previous or next value.
Edited by: 913672 on Jul 2, 2012 3:44 AM

Are you looking for something like this?
select * from
select dname,
       datetime,
       val,
       lag(val) over (partition by upper(dname) order by datetime) prev_val,
       lead(val) over (partition by upper(dname) order by datetime) next_val,
       case when nvl(val,0)<0 and lag(val) over (partition by upper(dname) order by datetime) >0 then
         lag(val) over (partition by upper(dname) order by datetime)
       else
         lead(val) over (partition by upper(dname) order by datetime)
       end gt0_val
from device
order by datetime
where substr(datetime,15,2)='00';Please take a look at the result_column gt0_val.
Edited by: hm on 02.07.2012 04:06

Help needed in decode function

I am trying to use decode function shown below
select decode(deptid,(select deistinct dept_id from dept),'found') into id from student ;
it shows error ORA 01427:single-row subquery returns more than one row.
could you people help me resovle the issue.
Thanks.

Funny thing how many mistakes can be in one little line. I try to list what is wrong here. maybe it helps you to understand what is going on.
select decode(deptid,(select deistinct dept_id from dept),'found') into id from student ;1) "deistinct" => wrong spelling "distinct"
2) Uniqueness => the typical DEPT table has DEPT_ID as a primary key. So DISTINCT would do nothing here. "select distinct dept_id from dept" is the same as "select dept_id from dept".
3) decode with a multi-row subquery => the decode function only accepts single values. e.g: ,"decode(deptid,(select max(dept_id) from dept),..." => THis is not really useful, just an example.
4) decode without handling other values => it is better to say what should happen, when the values does not match. decode(deptid,:x,'found','notfound')
5) select .. into ... from. => INTO is only used in a PL/SQL . So I assume this statement is part of a larger PL/SQL block. In that case "into id " is a problem. The select would return many values, but your ID variable could probably hold only one value.
6) Identification of values => For all students that could be returned, you only would know 'found'. At least select the ID for the student too, else you wouldn't know which student was found. select id, 'found' ... from student.
7) Don't select everthing and check for each row later. Select only relevent rows. That means do your checks in the WHERE clause of a select statement not in the SELECT clause. Example: "select id from student where dept_id in (select dept_id from dept);" Possible in this case is also a join "select student.id from student, dept where student.dept_id=dept.dept_id"
8) referential integrity. Why do have to do this check anyway? On table student there should be a FK constraint, so that only values can be inserted where the DEPT_ID is correct. Then you select would be "select id from student;".

Case, decode functions

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