Corelated subquery Vs Nested Sub Query
hi all,
i am having a small doubt regarding the usage of corelated subqueries. what is the difference between corelated subquery & nested subquery in terms of performance. Which is more advisable to use?
pls. help me.
"The one that gives you the best performance when benchmarked with your data"
I would ammend that to:
The one that gives you the best performance and the right answer when benchmarked with your data
John
Similar Messages
-
HI,
how ro write nested multiple row ( row should consist range of values )sub query between tables if they dont have any common column.
Based on this weight range I have to group the other columns.
For eg:
My table should contain
weight-range:
1-> 2
2->3
3->4
etcPlease repost your question adding clarity and an example so we can understand what you are asking. Also include your full version number.
SELECT * FROM v$version; -
Hello All,
I would like to show out put with Reference Table values. I am wondering how I can do nested , sub query.
Thanks in advance,
NYHi,
Whenever you have a problem, it helps to post the sample data as CREATE TABLE and INSERT staements. Without tables and data, nobody can test anything.
It is essential that you post the results you want to get from the data.
Are these the results you want from the data you posted?
T3_ID RF_ID NAME
1 2 DC
2 3 Garu
3 2 DCIf so, do this:
SELECT match.t3_id
, match.rf_id
, rf.name
FROM match
JOIN rf ON match.rf_id = rf.pk
; -
Scoping violation in sub-query
I created a sql in Oracle Database 11g Enterprise Edition Release 11.2.0.2.0 to query Oracle Purchasing tables. The user wants to know an estimate of the number of business days it takes to approve a release once it is created. I created a subquery as follows:
Select Papf.Full_Name As Approver
, Pah.Action_Date As Approved_Date
, Por.Creation_Date
, Trunc(Pah.Action_Date) - Trunc(Por.Creation_Date) As Days
, (Select Count(*)
From (Select Level, (Pah.Action_Date+1)-Level My_Date From Dual
Connect By Level < Trunc(Pah.Action_Date+1) - Trunc(por.creation_Date)
) Where To_Char(My_Date, 'DY') In ('MON', 'TUE', 'WED', 'THU', 'FRI')) As Days2Approve
FROM Apps.Po_Headers_All Poh
, Apps.Po_Releases_All Por
, Apps.Po_Lines_All Pol
, Apps.Po_Action_History Pah
…etc.
When I run the query I get the following error message:
ORA-00904: "POR"."CREATION_DATE": invalid identifier
00904. 00000 - "%s: invalid identifier"
*Cause:
*Action:
Error at Line: 193 Column: 54
I know the sub-query conceptually sound because if I run the sql below with dummy dates I get 17 which is correct.
Select Count(*)
From (SELECT level, (to_date('24-JAN-2013')+1)-level my_date From Dual
Connect By Level < Trunc(To_Date('24-JAN-2013')+1) - Trunc(To_Date('01-JAN-2013'))
) Where To_Char(My_Date, 'DY') In ('MON', 'TUE', 'WED', 'THU', 'FRI')
How do I pass Pah.Action_Date & por.creation_Date to the sub-query without getting what appears to be scoping violation?
…Hi,
You can avoid the problem by not using a nested sub-query:
SELECT COUNT (*)
FROM dual
CONNECT BY LEVEL < TRUNC (pah.action_date + 1)
- TRUNC (por.creation_date)
WHERE TO_CHAR ( pah.action_date + 1 - LEVEL
, 'DY'
) NOT IN ('SAT', 'SUN')
) AS days2approve
I hope this answers your question.
If not, post a little sample data (CREATE TABLE and INSERT statements, relevant columns only) for all tables involved, and also post the results you want from that data.
Explain, using specific examples, how you get those results from that data.
See the forum FAQ {message:id=9360002} -
Difference between sub-query and corelated subquery
Hi,
can anyone please give me the clear difference between sub-query and coreleated subquery with an example.
I am very much confused with the both.
Also please let me know in which cases/situation these are used.
Thanks,Basically Sub Query is Query within Query. There are different type of SubQuery.
1. Scalar Sub Query
Query that is totally independent from the main query.
select empno, (select count(*) from emp) total_emp
from emphere the subquery is totally independent of the main query.
2. Corelated Sub Query
The sub query reffers to the main query.
select empno, (select deptname from dept d where e.deptno = d.deptno) deptname
from emp e3. Inline view
A sub query that is used as a table or view in a SQL
select *
from (select empno, deptname
from emp e, dept d
where e.deptno = d.deptno)
where sal > 100 -
Issue with join condition while using in the corelated sub query
Bees,
I am not able to use the below query since i have used a join condition in the corelated sub qery inline view.But i have a requirement like this . Please help me on this
select * from dept d
where exists (select 1 from (
select deptno
from emp where deptno= d.deptno)
Thank you
BooooHi,
I've never seen a general solution for how to reference columns from main query a from sub-query c, where c is is sub-query of b, which is a sub-query of a.
Whenever I've wanted to, I've been able to get the desired results with a different approach.
In this case, you seem to want
SELECT *
FROM dept d
WHERE EXISTS (
SELECT 1
FROM emp
WHERE deptno = d.deptno
);I'm guessing at your data and desired output. -
Number of Execution of Sub-Query
Hi,
Let suppose we have a SQL which has a sub-query in the filter NOT IN clause as shown below. I wish to know that whether for each record from Table_1 (T1),
the inner/filter SQL will execute
or
It will execute only once for that session (All the records from T1).
Meaning: Let suppose Table_1 has 5 Million records. So whether the filter/sub-query will be executed 5 Million times by Oracle Engine or It will be executed only once.
SQL:
SELECT T1.C1, T1.C2, T2.C3 FROM Table_1 T1
INNER JOIN
Table_2 T2
ON T1.C1=T2.C1
WHERE T1.C2 = 0 AND
T1.C4 NOT IN(SELECT DISTINCT COLUMN_12 FROM TABLE_3 WHERE COLUMN_13 = 'VALUE');
Best Regards,
MayurIt depends on the execution plan. NOT IN can be converted to NOT EXISTS, it can be converted to an ANTI-JOIN.
If it's converted to a hash (or merge) ANTI-JOIN the subquery is (effectively) executed once, if it's converted to a nested loop anti-join it's (effectively) executed once per row in the driving rowsource. If it's converted to a NOT EXISTS filter subquery it may be executed as much as once per row in the driving row source, it may be executed as little as once per distinct value in the driving row source. (See http://jonathanlewis.wordpress.com/2006/11/06/filter-subqueries/ for an example of the FILTER subquery count
Regards
Jonathan Lewis -
Deal All,
Please help me to know list of Drawback/Limitation of Corellated Subquery.
i want to Optimize the correlated sub Query.
Thanks,
Dinesh Babu
9818783322See:
http://asktom.oracle.com/pls/asktom/f?p=100:11:0::::P11_QUESTION_ID:3167884300346662300
It would be nice to know your database version.
It would be nice to know what query you're executing
It would be nice to see an execution plan
It would be nice if you'd first read the SQL and PL/SQL FAQ, especially:
SQL and PL/SQL FAQ
and
*3. How to improve the performance of my query? / My query is running slow*.
When your query takes too long...
How to post a SQL statement tuning request
SQL and PL/SQL FAQ -
How to find out which sub query returns more than one row
Hi all,
Can any one give me clue ,how to find out which sub query returns more than one row in the following query .
/* Formatted on 2011/05/17 19:22 (Formatter Plus v4.8.8) */
SELECT a.*, ROWNUM AS rnm
FROM (SELECT DISTINCT '1' AS "Page View", ou.org_unit_name AS "Org",
prxm.mbr_idntfr AS "Beneficiary ID",
md.last_name
|| ', '
|| md.first_name AS "Beneficiary Name",
pci.idntfr AS "Tracking No.",
TO_CHAR (TRUNC (req.pa_rqst_date),
'MM/dd/yyyy'
) AS "Request Date",
sts.status_name AS "Status",
req.pa_rqst_sid AS "Request #",
prxm.mbr_sid AS "Mbr_sid",
TO_CHAR
(TRUNC (req.pa_revision_date),
'MM/dd/yyyy'
) AS "Last Updated",
TO_CHAR (psd.TO_DATE, 'MM/dd/yyyy') AS "TO_DATE",
prxpl.prvdr_lctn_iid AS "PRVDR_LCTN_IID",
pd.prvdr_sid AS "PRVDR_SID", 'Y' AS "State View",
DECODE
((SELECT DISTINCT pd.national_prvdr_idntfr
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid =
req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
0, (SELECT prxplo.prvdr_lctn_idntfr
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
NULL, (SELECT prxplo.prvdr_lctn_idntfr
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
(SELECT DISTINCT pd.national_prvdr_idntfr
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid =
req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR')
) AS "NPI/ID",
DECODE
((SELECT pd.org_bsns_name
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
NULL, (SELECT pd.last_name
|| ', '
|| pd.first_name
|| ' '
|| pd.middle_name
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR'),
(SELECT pd.org_bsns_name
FROM pa_request_x_provider_location prxplo
WHERE prxplo.pa_rqst_sid = req.pa_rqst_sid
AND prxplo.oprtnl_flag = 'A'
AND prxplo.pa_prvdr_type_lkpcd = 'RR')
) AS "Prvdr Name",
TO_CHAR (psd.from_date,
'MM/dd/yyyy'
) AS "Srvc From Date",
TO_CHAR (req.validity_start_date,
'MM/DD/YYYY'
) AS "Due Date",
(fn_get_busniess_days (TRUNC (req.validity_start_date))
) AS "Days<br>Left",
req.pa_mode_type_lkpcd AS "Source",
TO_CHAR (TRUNC (wmdtl.rtng_date),
'MM/dd/yyyy'
) AS "Assigned On",
NVL (wmdtl.assigned_to_user_name,
'Not Assigned'
) AS "Assigned To",
req.org_unit_sid AS "OrgUnitSid",
TO_CHAR
(wmdtl.modified_date,
'MM/dd/yyyy hh24:mi:ss'
) AS "WTRD_MODIFIED_DATE",
TO_CHAR (wmdtl.rtng_date,
'MM/dd/yyyy'
) AS "WTRD_RTNG_DATE",
req.status_cid AS "PA_STATUS_CID",
TO_CHAR (req.modified_date,
'MM/dd/yyyy'
) AS "PA_REQ_MODIFIED_DATE",
prs.state_pa_srvc_type_code
AS "STATE_PA_SRVC_TYPE_CODE",
wmdtl.wm_pa_task_rtng_dtl_sid
AS "WM_TASK_RTNG_DTL_SID",
wmdtl.assigned_to_user_acct_sid
AS "WTRD_Assigned_to_user_acct_sid",
(fn_get_busniess_days (TRUNC (req.validity_start_date))
) AS "Days<br>LeftSort",
wmdtl.assigned_to_org_unit_sid
AS "WTRD_Assigned_to_OrgUntSid",
DECODE
((SELECT COUNT (*)
FROM pa_request_status prs
WHERE prs.pa_rqst_sid = req.pa_rqst_sid
AND prs.status_cid = 5
AND prs.oprtnl_flag = 'I'),
0, 'N',
'Y'
) AS "SHOW_UTILIZATION"
FROM pa_request req,
pa_certification_identifier pci,
status sts,
pa_request_x_member prxm,
wm_pa_task_routing_detail wmdtl,
pa_service_date psd,
org_unit ou,
pa_request_service prs,
pa_request_x_provider_location prxpl,
provider_location pl,
provider_detail pd,
provider p,
mbr_dmgrphc md
WHERE req.oprtnl_flag = 'A'
AND req.status_cid NOT IN
(20, 30, 70, 25, 80, 96, 85, 5, 97, 98, 101)
AND req.org_unit_sid IN
(3057, 3142, 3058, 3143, 3059, 3144, 3060, 3145,
3061, 3146, 3062, 3147, 3063, 3148, 3064, 3149,
3065, 3150, 3066, 3151, 3067, 3152, 3068, 3153,
3069, 3154, 3070, 3155, 3071, 3156, 3072, 3157,
3073, 3158, 3074, 3159, 3075, 3160, 3076, 3161,
3077, 3162, 3078, 3163, 3079, 3164, 3080, 3165,
3081, 3166, 3082, 3167, 3083, 3168, 3084, 3169,
3085, 3170, 3086, 3171, 3087, 3172, 3088, 3173,
3089, 3174, 3090, 3175, 3091, 3176, 3092, 3177,
3093, 3178, 3094, 3179, 3095, 3180, 3096, 3181,
3097, 3182, 3098, 3183, 3099, 3184, 3100, 3185,
3101, 3186, 3102, 3187, 3103, 3003, 75000104,
75000108, 2006, 75000103, 75000102, 75000113,
75000111, 75000109, 2001, 2009, 75000105,
75000107, 2004, 2010, 2013, 2014, 2005, 2011,
75000112, 2002, 1001, 2012, 75000106, 2007,
75000101, 2003, 75000110, 2008, 3001, 3002, 3019,
3104, 3020, 3105, 3021, 3106, 3022, 3107, 3023,
3108, 3024, 3109, 3025, 3110, 3026, 3111, 3027,
3112, 3028, 3113, 3029, 3114, 3030, 3115, 3031,
3116, 3032, 3117, 3033, 3118, 3034, 3119, 3035,
3120, 3036, 3121, 3037, 3122, 3038, 3123, 3039,
3124, 3040, 3125, 3041, 3126, 3042, 3127, 3043,
3128, 3044, 3129, 3045, 3130, 3046, 3131, 3047,
3132, 3048, 3133, 3049, 3134, 3050, 3135, 3051,
3136, 3052, 3137, 3053, 3138, 3054, 3139, 3055,
3140, 3056, 3141)
AND req.pa_rqst_sid = prs.pa_rqst_sid
AND prs.oprtnl_flag = 'A'
AND prs.pa_rqst_srvc_sid = psd.pa_rqst_srvc_sid
AND psd.oprtnl_flag = 'A'
AND req.pa_rqst_sid = pci.pa_rqst_sid
AND pci.oprtnl_flag = 'A'
AND req.pa_rqst_sid = prxm.pa_rqst_sid
AND prxm.oprtnl_flag = 'A'
AND md.oprtnl_flag = 'A'
AND md.status_cid = 2
AND TRUNC (SYSDATE) BETWEEN md.from_date AND md.TO_DATE
AND prxm.mbr_sid = md.mbr_sid
AND ou.org_unit_sid = req.org_unit_sid
AND ou.oprtnl_flag = 'A'
AND req.pa_rqst_sid = prxpl.pa_rqst_sid
AND prxm.pa_rqst_sid = prxpl.pa_rqst_sid
AND pci.pa_rqst_sid = prxm.pa_rqst_sid
AND pci.pa_rqst_sid = wmdtl.subsystem_task_sid
AND pci.pa_rqst_sid = prxpl.pa_rqst_sid
AND prxpl.pa_prvdr_type_lkpcd = 'RR'
AND prxpl.oprtnl_flag = 'A'
AND req.status_cid = sts.status_cid
AND sts.status_type_cid = 3
AND sts.oprtnl_flag = 'A'
AND prxpl.prvdr_lctn_iid = pl.prvdr_lctn_iid
AND p.prvdr_sid = pd.prvdr_sid
AND p.prvdr_sid = pl.prvdr_sid
AND pd.oprtnl_flag = 'A'
AND pd.status_cid = 2
AND TRUNC (SYSDATE) BETWEEN pd.from_date AND pd.TO_DATE
AND wmdtl.subsystem_task_sid = req.pa_rqst_sid
AND wmdtl.subsystem_lkpcd = 'PA'
AND wmdtl.oprtnl_flag = 'A'
AND req.pa_rqst_date > (SYSDATE - 365)
ORDER BY TO_DATE ("Request Date", 'MM/dd/yyyy hh24:mi:ss') DESC,
"Beneficiary Name" ASC) a
WHERE ROWNUM < 102;regards,
P Prakash
Edited by: BluShadow on 17-May-2011 15:01
added {noformat}{noformat} tags around the code833560 wrote:
Can any one give me clue ,how to find out which sub query returns more than one row in the following query .This is why smaller, simpler queries are easier to work with than huge ones - when something like this goes wrong smaller queries are much eaiser to debug. Unfortunately using smaller, easier-to-work with queries is not always an option
Ganesh is right - you will have to dissect the big query bit by bit until you find the offending subquery. If there is another way I would like to find out about it too.
The easiest way to do this is probably to use block comments to isolate parts of the query bit by bit until you find the offending part. If you carefully examine the subqueries you might be able to figure out which one is returning multiple rows without commenting everything
Good luck! -
How to use sub query in CAML in splist
hi,
want to know whether any sub query functionality can be achieved in splist/sp doc lib using CAML designer 2013/ query builder. also inner joins need to be implemented as pe rmy requirement.
if caml designer is not supported, whats the allternative way of doing this?
can LINQ to SP be used? if yes, can anyone pls roivde how to implement the same
help is appreciatedYou can use the let keyword to scope a variable containing the result of your subquery.
However, it depends on the LINQ provider as to whether or not it can understand the command.
For example, you can create the sample like this
var result = (from p in productInQuery
join o in orderInfoQuery on p.refNo equals o.refNo
join t in productOutQuery on p.no equals t.productInNo into productIn
from t in productIn.DefaultIfEmpty()
let dateOut = (from m in orderInfoQuery where m.refNo == t.refNo select m.processData).FirstOrDefault()
orderby o.processDate descending
select new
modelNo = x.modelNo,
qty = p.qty,
dateIn = o.processDate,
dateOut = dateOut
https://www.youtube.com/watch?v=N3K0h6GDwW4
For more info, check this
http://msdn.microsoft.com/en-us/library/ee539975.aspx -
Hi, I have two issues, here is my initial code:
select
cc.name_id_no
,cc.discover_date
,cc.cla_case_no
,max(rl.year_of_incident)Non_Loss_Past_5
,rl.timestamp
from cla_case cc, rbn_loss rl
where cc.name_id_no = rl.customer_no
and rl.year_of_incident < trunc(cc.discover_date)
and rl.type_of_loss < 1000
and rl.timestamp < trunc(cc.discover_date)
and (cc.question_class = 20
or cc.question_class = 25)
and (trunc(cc.discover_date)- (rl.year_of_incident)) < 1095
--and (trunc(cc.discover_date) <> (rl.year_of_incident))
group by cc.cla_case_no,name_id_no, cc.discover_date,rl.timestamp
Now a cla_case_no can map to several year_of_incident. I only want the cla_case_no that maps to the max year_of_incident ie There should only be a single cla_case_no corresponding to the max year_of_incident.
To get around this I did the following which is not very efficient and I'm hoping it can be improved:
select distinct z.cla_case_no from (
select
cc.name_id_no
,cc.discover_date
,cc.cla_case_no
,max(rl.year_of_incident)Non_MW_Loss_Past_5
,rl.timestamp
from cla_case cc, rbn_loss rl
where cc.name_id_no = rl.customer_no
and rl.year_of_incident < trunc(cc.discover_date)
and rl.type_of_loss < 1000
and rl.timestamp < trunc(cc.discover_date)
and (cc.question_class = 20
or cc.question_class = 25)
and (trunc(cc.discover_date)- (rl.year_of_incident)) < 1095
--and (trunc(cc.discover_date) <> (rl.year_of_incident))
group by cc.cla_case_no,name_id_no, cc.discover_date,rl.timestamp
) z
Now comes the second issue: The above is actually a subquery that will link to a bigger table via cla_case_no ccx
SELECT
ie ,(select distinct z.cla_case_no from (
select cc.name_id_no, cc.discover_date ,cc.cla_case_no, max(rl.year_of_incident)Non_MW_Loss_Past_5, rl.timestamp
from cla_case cc, rbn_loss rl
where cc.name_id_no = rl.customer_no
and rl.year_of_incident < trunc(cc.discover_date)
and rl.type_of_loss < 1000
and rl.timestamp < trunc(cc.discover_date)
and (cc.question_class = 20
or cc.question_class = 25)
and (trunc(cc.discover_date)- (rl.year_of_incident)) < 1095
--and (trunc(cc.discover_date) <> (rl.year_of_incident))
group by cc.cla_case_no,name_id_no, cc.discover_date,rl.timestamp
) z
where z.cla_case_no = ccx.cla_case_no
) Non_MW_Loss_Past_5
FROM etc
Now only certain cc.cla_case_no from the subquery will corresp to the ccx_cla_case_no from the main table and the other entries will be null.
What I require is that if the subquery returns a result that IS NOT NULL to return 'Y' ELSE 'N' instead of the varies cla_case_no's and (null) entries in the Non_MW_Loss_Past_5 column
Thanks!!!
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NLSRTL Version 11.2.0.2.0 - ProductionHi,
It looks like you have another copy of this question:
Case Statement and sub query
That's probably not your fault, but you should mark the other copy as "Answered" right away, and then you'll only have to look for replies in one place.
885178 wrote:
... Now a cla_case_no can map to several year_of_incident. I only want the cla_case_no that maps to the max year_of_incident ie There should only be a single cla_case_no corresponding to the max year_of_incident.If you know there will only be one, then you can use LAST, and you don't need GrOUP BY
To get around this I did the following which is not very efficient and I'm hoping it can be improved:
select distinct z.cla_case_no from (
select
cc.name_id_no
,cc.discover_date
,cc.cla_case_no
,max(rl.year_of_incident)Non_MW_Loss_Past_5
,rl.timestamp
from cla_case cc, rbn_loss rl
where cc.name_id_no = rl.customer_no
and rl.year_of_incident < trunc(cc.discover_date)
and rl.type_of_loss < 1000
and rl.timestamp < trunc(cc.discover_date)
and (cc.question_class = 20
or cc.question_class = 25)
and (trunc(cc.discover_date)- (rl.year_of_incident)) < 1095
--and (trunc(cc.discover_date) <> (rl.year_of_incident))
group by cc.cla_case_no,name_id_no, cc.discover_date,rl.timestamp
) zHere's one way:
SELECT MIN (cla_case_no) KEEP (DENSE_RANK LAST ORDER BY r1.year_of_incident)
AS latest_cla_case_no
FROM cla_case cc
, rbn_loss rl
WHERE cc.name_id_no = rl.customer_no
AND rl.year_of_incident > TRUNC (cc.discover_date) - 1095
AND rl.year_of_incident < TRUNC (cc.discover_date)
AND rl.type_of_loss < 1000
AND rl.timestamp < TRUNC (cc.discover_date)
AND cc.question_class IN (20, 25)
;If you'd post some sample data (CREATE TABLE and INSERT statements) and the results you want from that data, then I could test this.
Now comes the second issue: The above is actually a subquery that will link to a bigger table via cla_case_no ccx
SELECT
ie ,(select distinct z.cla_case_no from (
select cc.name_id_no, cc.discover_date ,cc.cla_case_no, max(rl.year_of_incident)Non_MW_Loss_Past_5, rl.timestamp
from cla_case cc, rbn_loss rl
where cc.name_id_no = rl.customer_no
and rl.year_of_incident < trunc(cc.discover_date)
and rl.type_of_loss < 1000
and rl.timestamp < trunc(cc.discover_date)
and (cc.question_class = 20
or cc.question_class = 25)
and (trunc(cc.discover_date)- (rl.year_of_incident)) < 1095
--and (trunc(cc.discover_date) <> (rl.year_of_incident))
group by cc.cla_case_no,name_id_no, cc.discover_date,rl.timestamp
) z
where z.cla_case_no = ccx.cla_case_no
) Non_MW_Loss_Past_5
FROM etc
Now only certain cc.cla_case_no from the subquery will corresp to the ccx_cla_case_no from the main table and the other entries will be null.
What I require is that if the subquery returns a result that IS NOT NULL to return 'Y' ELSE 'N' instead of the varies cla_case_no's and (null) entries in the Non_MW_Loss_Past_5 column
NVL2 (x, 'Y', 'N')returns 'Y' if x is NULL, and it returns 'N' if x is not NULL. X can be a scalar sub-query:
NVL2 ((SELECT ...), 'Y', 'N')You could also use an EXISTS sub-query:
CASE
WHEN EXISTS (SELECT ...)
THEN 'Y'
ELSE 'N'
END -
Hi,
Can we use order by clause in Sub query?
While using the order by clause, I am getting the "missing expression error" . If I remove order by clause query executing fine.
Here is my query:
select *
from emp_mstr
where emp_no in(select
emp_no
from emp_mstr
order by branch_no);
Thanks & Regards,
MahiMay be you miss some required spaces also, other than wrong use of ORDER BY
select *
from emp_mstr
where emp_no in
( select e2.emp_no
from emp_mstr e2
-- order by e2.branch_no
);Why do you want to ORDER BY in the subquery, which you use with IN clause? That will not make any difference in the result..Means the result you get with ORDER BY will be same as without that.. And in this case, ORDER by is a unncessary overhead.. And Ordering is very costly..
And why do you want to have the IN clause at all in your query? You are referring the same tables in the main query and sub query..
The below will give the same result
select *
from emp_mstr
where emp_no is not nullIf you want to use another table in the subquery, always use aliasess...
select *
from emp_mstr
where emp_no in
( select e2.emp_no
from emp_mstr2 e2
-- order by e2.branch_no
); -
Correlated sub-query/outer join problem
Hi,
I have a problem similar to this one (Outer join with correlated subquery but I'm struggling to find a solution for mine!
The following query works OK unless there is no entry in room_prices, so I need to outer join somehow to that table otherwise it doesn't return any rows.
The main difference between the query in the other thread and mine is that mine has an extra table (bookings b) in the sub-query, which is complicating things a bit.
select b.book_from,
b.book_to,
b.flat_rate,
nvl(c.discount,0),
p.hourly,
p.half_day,
p.daily,
p.discountable,
p.surcharge,
l.evening_start,
nvl(b.full_day,'N')
from booking.bookings b,
booking.customer c,
booking.room_prices p,
booking.rooms r,
booking.location l
where b.id = 9272
and c.id = b.customer
and b.room = p.room
and b.room = r.id
and r.loc = l.id
and p.from_date =
select max(p2.from_date)
from booking.room_prices p2
where p2.room = p.room
and p2.from_date < b.book_from
Could anyone suggest a way to re-write the query so that it is outer joined to room_prices?
Thanks,
HazelThanks for both of your responses.
Unfortunately your suggestion didn't work Dmytro - still no rows are returned.
Here are some table creation scripts and test data to insert:
CREATE TABLE BOOKINGS
ID NUMBER NOT NULL,
ROOM NUMBER NOT NULL,
CUSTOMER NUMBER NOT NULL,
BOOK_FROM DATE NOT NULL,
BOOK_TO DATE NOT NULL,
CONFIG VARCHAR2(24) NOT NULL,
CREATED_DATE DATE NOT NULL,
CREATED_BY VARCHAR2(16) NOT NULL,
UPDATED_DATE DATE,
UPDATED_BY VARCHAR2(16),
DELEGATES NUMBER,
NARRATIVE VARCHAR2(256),
CONTACT_DETAILS VARCHAR2(400),
CONFIRMED VARCHAR2(1),
CANC_REASON NUMBER,
FULL_DAY VARCHAR2(1),
FLAT_RATE NUMBER,
STANDBY NUMBER,
TOTAL_STANDBY_TIME DATE,
PRE_STANDBY_TIME DATE,
PRE_STANDBY NUMBER,
GL_CODE VARCHAR2(20)
CREATE TABLE CUSTOMER
ID NUMBER NOT NULL,
CUSTOMER VARCHAR2(160) NOT NULL,
CONTACT_ADDRESS VARCHAR2(240),
CONTACT_TELEPHONE VARCHAR2(20),
CONTACT_EMAIL VARCHAR2(160),
CREATED_DATE DATE NOT NULL,
CREATED_BY VARCHAR2(16) NOT NULL,
UPDATED_DATE DATE,
UPDATED_BY VARCHAR2(16),
DISCOUNT NUMBER(5,2),
CUST_TYPE VARCHAR2(1),
CONTACT_FAX VARCHAR2(20),
DEBTOR_NO VARCHAR2(20),
BC_CONTACT VARCHAR2(64)
CREATE TABLE ROOMS
ID NUMBER NOT NULL,
LOC NUMBER NOT NULL,
NAME VARCHAR2(160) NOT NULL,
CREATED_DATE DATE NOT NULL,
CREATED_BY VARCHAR2(16) NOT NULL,
UPDATED_DATE DATE,
UPDATED_BY VARCHAR2(16),
ACTIVE VARCHAR2(1),
ROOM_DESC VARCHAR2(2000)
CREATE TABLE LOCATION
ID NUMBER NOT NULL,
NAME VARCHAR2(240) NOT NULL,
ADDRESS VARCHAR2(240),
PCODE VARCHAR2(8),
CREATED_DATE DATE NOT NULL,
CREATED_BY VARCHAR2(16) NOT NULL,
UPDATED_DATE DATE,
UPDATED_BY VARCHAR2(16),
CONF_RDF VARCHAR2(10),
CLOSING VARCHAR2(5),
EVENING_START VARCHAR2(5)
CREATE TABLE ROOM_PRICES
ROOM NUMBER NOT NULL,
FROM_DATE DATE NOT NULL,
HOURLY NUMBER(6,2),
HALF_DAY NUMBER(6,2),
DAILY NUMBER(6,2),
DISCOUNTABLE VARCHAR2(1),
CREATED_DATE DATE NOT NULL,
CREATED_BY VARCHAR2(16) NOT NULL,
UPDATED_DATE DATE,
UPDATED_BY VARCHAR2(16),
SURCHARGE NUMBER(6,2)
Insert into bookings
(ID, ROOM, CUSTOMER, BOOK_FROM, BOOK_TO, CONFIG, CREATED_DATE, CREATED_BY, UPDATED_DATE, UPDATED_BY, DELEGATES, NARRATIVE, CONTACT_DETAILS, CONFIRMED, FLAT_RATE, PRE_STANDBY_TIME, PRE_STANDBY)
Values
(9272, 7466, 4946, TO_DATE('10/25/2005 10:00:00', 'MM/DD/YYYY HH24:MI:SS'), TO_DATE('10/25/2005 13:00:00', 'MM/DD/YYYY HH24:MI:SS'), 'Default', TO_DATE('10/27/2005 15:35:02', 'MM/DD/YYYY HH24:MI:SS'), 'HSIS0201', TO_DATE('10/27/2005 15:36:26', 'MM/DD/YYYY HH24:MI:SS'), 'HSIS0201', 1, 'another meeting', 'Hazel', 'Y', 40, TO_DATE('10/25/2005 09:30:00', 'MM/DD/YYYY HH24:MI:SS'), 1800);
Insert into customer
(ID, CUSTOMER, CONTACT_ADDRESS, CONTACT_TELEPHONE, CREATED_DATE, CREATED_BY, CUST_TYPE, BC_CONTACT)
Values
(4946, 'Association of Teachers', 'Address', '0191 8887777', TO_DATE('09/22/2003 08:05:47', 'MM/DD/YYYY HH24:MI:SS'), 'Dataload', 'B', 'Miss Jones');
Insert into rooms
(ID, LOC, NAME, CREATED_DATE, CREATED_BY, UPDATED_DATE, UPDATED_BY, ACTIVE)
Values
(7466, 308, ' Counselling Room 1', TO_DATE('04/11/2005 10:55:33', 'MM/DD/YYYY HH24:MI:SS'), 'BJAC1906', TO_DATE('06/22/2005 14:43:50', 'MM/DD/YYYY HH24:MI:SS'), 'HSIS0201', 'Y');
Insert into location
(ID, NAME, ADDRESS, PCODE, CREATED_DATE, CREATED_BY, UPDATED_DATE, UPDATED_BY, CONF_RDF, CLOSING, EVENING_START)
Values
(308, 'Business Centre', 'Address', 'NE30 1NT', TO_DATE('03/19/2003 13:07:35', 'MM/DD/YYYY HH24:MI:SS'), 'BJAC1906', TO_DATE('06/09/2005 11:17:09', 'MM/DD/YYYY HH24:MI:SS'), 'BJAC1906', 'BKCF_2', '22:30', '18:00');
Thanks,
Hazel -
Joining with sub query not working
Hi
I am new with these complex queries. I am trying to join a sub query to a query as below;
SELECT Events1.InvoiceBatch AS BatchNo, Events1.InvoiceBatchDate AS BatchDate, tblClients.Company, tblClients.ID AS ClientID, COUNT(Events1.ID) AS Invoices,
COUNT(*) - COUNT(Events1.InvoicePrintDate) AS E, Events1.InvoiceBatchFromDate AS BatchFrom, Events1.InvoiceBatchToDate AS BatchTo, (SELECT EventID, SUM(Total) FROM tblStaffBookings AS StaffBookings WHERE StaffBookings.EventID = Events1.ID GROUP BY EventID) AS Total
FROM tblEvents AS Events1 LEFT OUTER JOIN
tblClients ON Events1.ClientID = tblClients.ID
WHERE (Events1.FactoringExportDate IS NULL) OR (Events1.AccountsExportDate IS NULL) OR (Events1.InvoiceSentDate IS NULL)
GROUP BY Events1.InvoiceBatch, Events1.InvoiceBatchDate, tblClients.Company, tblClients.ID, Events1.InvoiceBatchFromDate, Events1.InvoiceBatchToDate
HAVING (Events1.InvoiceBatch = 5212)
ORDER BY tblClients.Company
I am getting these two errors;
Msg 8120, Level 16, State 1, Line 2
Column 'tblEvents.ID' is invalid in the select list because it is not contained in either an aggregate function or the GROUP BY clause.
Msg 116, Level 16, State 1, Line 2
Only one expression can be specified in the select list when the subquery is not introduced with EXISTS.
What am I missing?
Thanks
RegardsSELECT Events1.InvoiceBatch AS BatchNo, Events1.InvoiceBatchDate AS BatchDate, tblClients.Company, tblClients.ID AS ClientID, COUNT(Events1.ID) AS Invoices,
COUNT(*) - COUNT(Events1.InvoicePrintDate) AS E, Events1.InvoiceBatchFromDate AS BatchFrom, Events1.InvoiceBatchToDate AS BatchTo,Total
FROM tblEvents AS Events1 LEFT OUTER JOIN
tblClients ON Events1.ClientID = tblClients.ID
LEFT OUTER JOIN (SELECT EventID, SUM(Total) AS Total FROM tblStaffBookings AS StaffBookings WHERE StaffBookings.EventID = Events1.ID GROUP BY EventID) sb
ON sb.EventID = Events1.ID
WHERE (Events1.FactoringExportDate IS NULL) OR (Events1.AccountsExportDate IS NULL) OR (Events1.InvoiceSentDate IS NULL)
GROUP BY Events1.InvoiceBatch, Events1.InvoiceBatchDate, tblClients.Company, tblClients.ID, Events1.InvoiceBatchFromDate, Events1.InvoiceBatchToDate,Total
HAVING (Events1.InvoiceBatch = 5212)
ORDER BY tblClients.Company
Please Mark This As Answer if it solved your issue
Please Vote This As Helpful if it helps to solve your issue
Visakh
My Wiki User Page
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Says;
Msg 4104, Level 16, State 1, Line 5
The multi-part identifier "Events1.ID" could not be bound.
on
LEFT OUTER JOIN (SELECT EventID, SUM(Total) AS Total FROM tblStaffBookings AS StaffBookings WHERE StaffBookings.EventID = Events1.ID GROUP BY EventID) sb
Regards -
Use of Sub Query in a filter is throwing error
Hi
I am using a sub query in a filter which throws me the following error in owb 9i.
PLS 00405 : Subquery cannot be used in this context.
But the use of subquery works fine in a joiner operator.
Use of Sub Query in a filter works fine in owb 2i.
Could any one please help me.
Thanks in Advance
Nanda KishoreNanda,
Please wrap the source table in a view containing the subquery and then use the view as a source rather than use the subquery in the filter.
Regards:
Igor
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