Inline Query And Joins
Jul 31, 2012When to use inline query and to use join.
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Performance Tuning :: How Joins Work With Inline Views
Dec 3, 2012how joins work with in-line views.I have a query and its explain plan as below:
SELECT e.ename,e.deptno,d.dname FROM
dept d,
emp e
WHERE e.deptno=d.deptno
AND e.deptno=20
[code]....
I do not find any difference in both the explain plans. Both are same. In my second query, the filtered rows will be joined to dept table. And hence the baggage will reduce.But how can I verify that in-line view has worked better?
SQL & PL/SQL :: Correlated Query And Inline View
Apr 9, 2010which one is better in performance point of view and why between inline view and correlated query.
View 5 Replies View RelatedQuery To Use Joins
Mar 11, 2009SELECT so.* FROM shipping_order so WHERE (so.submitter = 20)
OR (so.requestor_id IN (SELECT poc.objid FROM point_of_contact poc WHERE poc.ain = 20))
OR so.objid IN (SELECT ats.shipping_order_id FROM ac_to_so ats WHERE (ats.access_control_id IN (selectac. objid FROM access_control ac WHERE ac.ain = 20
OR ac.group IN ('buyers', 'managers'))))
rewrite this query to use joins. That would greatly simplify my sql query building code. The ids, objids, submitter, ain are numeric and group is a varchar.
Remote DB Query With Joins?
Feb 23, 2012We have access to a remote Oracle database in Germany and need to insert selected data to our local Oracle database. Our problem is that we have to do several joins (7 tables) on the remote database as well as using one where clause (always the same: P.T_LIEF_LFNT_1='12803193').
Unfortunately we do not have rights to create a view on the remote database. Is there another way to send the entire query to the remote database for processing? Also, the query returns approximately 34,000 rows.
Here is our current query:
INSERT INTO PRIMUS(PARTNO,
SORT_FORMAT,
TP_WORKSPACE,
[Code].....
PL/SQL :: Query Using Subquery And Joins
Feb 7, 2013I want to display first joined and last joined employee name(first_name) in each department like this
department_name | first joined employee | last joined employee
I think we have to use joins and sub query.
employee table attributes -
EMPLOYEE_ID
FIRST_NAME
LAST_NAME
EMAIL
PHONE_NUMBER
HIRE_DATE
JOB_ID
[Code]....
SQL & PL/SQL :: Using Inline View?
Oct 6, 2012I am working on this assignment question for class:
Write a SELECT statement that returns a single value that represents the sum of the largest unpaid invoices for each vendor (just one for each vendor). Use an inline view that returns MAX(invoice_total) grouped by vendor_id, filtering for invoices with a balance due
What I have coded so far is below
SELECT i.vendor_id,
To_char(SUM(invoice_total), '$9,999,999.99') AS sum_invoice_total
FROM invoices i
join (SELECT vendor_id,
[code]...
I am getting some results which I have attached. I'm not sure if I'm capturing the "largest unpaid invoices for each vendor" part of the question. Yielding to the knowledge the group and trying to use the proper posting etiquette. I have attached my output screen as well.
SQL & PL/SQL :: Inline View?
Aug 19, 2013the execution steps of inline view?importance&advantage of inline view?.Also reference link where i can get more information about inline view(i.e. basics to advanced),exercises and interview questions.
View 3 Replies View RelatedSQL Inline Count
Jun 14, 2007we're having a few tables which queries about 10.000 articles. As we don't show them all at once we are using pagination and use the rownum to show only a limited number of the results.
Now as these queries are pretty complex we have to optimize them and since we use pagination we have to call our query twice (first we make a count(*) and then we call the small resultset of a few rows). Ofcourse we are looking for a solution to call it only once and still use the pagination. We could load the whole resultset of 10.000 results and let java show only a few but that makes our line between the oracle and webserver pretty heavy. Is there a way to call the total number of results and give back only a small resultset just in one query?
SQL & PL/SQL :: Using Count In Inline View
Sep 23, 2011below query, first query is giving proper output i.e. 0 while second is giving wrong output i.e. 1.
Why this happen , what's wrong in using count in inline view ?
selecT count(*)
from (select *
from dual
where 1 = 2
union
select * from dual where 1 = 2);
[Code]....
SQL & PL/SQL :: Create A Table Through Inline View?
Oct 1, 2010 there is a diff. problem for me.when i create table through inline view then it shows 2246 records but if i check these records only in select statement then it shows 124 records. i cant understand how table shows 2246 records even then atual records in inline view shows only 124 records.
following is a query
create table sam as
select * from
((
select distinct stck.item_code
from (
select item_code,bal
[code]...
SQL & PL/SQL :: Inline View Degrade Performance
Apr 8, 2010I am working on Oracle 10g and Below is my query which is taking 30min. to execute. I am using two inline view and then make joins on these inline view because of i think it Degrade Performance.
Query :-
SELECT LEVEL_USER,
TRIAL_NO,
UNIT_NO,
COUNTRY_CODE,
PERSONNEL_NO,
[code].......
Note :- i have Attached the explain Plan for the same .Please let me know how can i improve performance of this Query.
PL/SQL :: Correlated Update (Inline View)
Jan 21, 2013Can I update inline view like below?
update
(select * from surveys s join answers a on s.survey_id = a.survey_seq_id where month = 201212 and qa = 1 and main_group_id = 55) a,
(select * from surveys s join answers a on s.survey_id = a.survey_seq_id where month = 201212 and qa = 1 and main_group_id = 3) b
where a.survey_id = b.survey_id and substr(a.question_uid , 3) = substr(b.question_uid, 2))
set b.answer = a.answer;
My second question is: The following query is giving error. What can I do?
update answers ans set (ans.answer) = (with a as (select * from surveys s join answers a on s.survey_id = a.survey_seq_id where month = 201212 and qa = 1 and main_group_id = 55),
b as (select * from surveys s join answers a on s.survey_id = a.survey_seq_id where month = 201212 and qa = 1 and main_group_id = 3)
select a.answer from a join b on a.survey_id = b.survey_id and substr(a.question_uid , 3) = substr(b.question_uid, 2) and b.answer_id = ans.answer_id) where ans.main_group_id = 3;
SQL Error: ORA-00904: "ANS"."ANSWER_ID":
SQL & PL/SQL :: How To Return 0 When Inline View Is Returning NULL
Sep 6, 2012Attached query is running fine if inline view B (Marked in Comments) returning value. If inline view B returns NULL then it fails to return result. I want if Inline view B is returning NULL then it should pass ZERO to main query.
View 2 Replies View RelatedSQL & PL/SQL :: Convert Data To Table / Inline View
May 10, 2013Is there a function that allows the following?
select SOME_FUNCTION('N','E','S','W') from dual;
That returns
N
E
S
W
Currently I'm just doing the following
WITH direction AS
(SELECT 'N' dir FROM DUAL
UNION
SELECT 'E' FROM DUAL
UNION
SELECT 'S' FROM DUAL
UNION
SELECT 'W' FROM DUAL)
SELECT *
FROM direction;
SQL & PL/SQL :: How To Use Window Functions In Where Clause Without Inline View
May 16, 2013Below is the query where I need to filter the data using window function.
I don't want to use inline view for mt query because i need to use the same query in OWB which it wont support.
Select a.Physical_Id,
a.Booking_Begin_Date,
a.Booking_End_Date,
[Code]....
I Cannot use below query in OWB Which is Inline View
----------------------------------------------------------------------------
Select b.* From
(Select a.Physical_Id,
a.Booking_Begin_Date,
[Code].....
PL/SQL :: Inline View Vs Subquery - Technical Difference
Jul 7, 2012After searching a lot on net the differences between inline view and subquery that i came across are
1) you can use order by in inline view but not in subquery.
2) you can use alias for inline view but not subquery.
i have to fetch the same outcome using both the functionality respectively, then what is the technical impact/better.
SQL & PL/SQL :: Where Oracle Stores Data Fetched From Inline View
Apr 25, 2012Just want to confirm, that where Oracle stores data fetched from inline view.
I am asking, as I am making an inline view on a very large table and its getting failed with TEMP space error.
PL/SQL :: Records Return Faster Inline Rather Than With Or Depends On Situation
Jan 15, 2013I have been using With for many queries for readability. This most recent query seemed to be taking a bit longer to run and I didn't think much of it until a colleague showed me their version (totally different sql statement) which ran faster, but seemed more complicated and had more lines of code. I noticed that the other version did not use with. I moved the sql of the with into the join and the query ran faster dropping from 30 seconds to 798 msecs. The question is am I sacrificing speed for readability by using With, or it really depends on the overall sql statement.
Here is the query using WITH:
with prev as
(
select person_uid, id, name, academic_period,
case when enrolled_ind = 'Y' and registered_ind = 'N' and student_status = 'AS' then 0 else 1 end as enreg_stat,
[Code]....
Application Express :: Email 4.2 Chart As Inline Image
Aug 20, 2013I have created a few flash charts using APEX4.2. Is there a way for the user to view the chart and then email it as an inline image to someone? I know that the user can save the chart as PDF file, then send it as an attachment via Outlook ( or similar system), but can I integrate these manual steps to one ( template), similar to the IR report's download feature ?
View 0 Replies View RelatedSelf Joins Getting Rid Of Duplicates?
Jun 17, 2008I have a table1:
userid, name, town.
Now i want to do a self join like:
select a.name, b.name, a.town
from table1 a
inner join table1 b
on a.town = b.town
where a.first_name <> b.first_name AND
a.last_name <> b.last_name
i added the where clause to limit duplicates i would get but i still get duplicates eg. A B london, B A london etc.
Using Subqueries In JOINS
Sep 30, 2011In mys store procedure I am using a subquery with INNER JOIN. This subquery calls a user defined function which takes main query fields as parameter values. But i am facing issue for accessing main query fields. my query is like below:
SELECT
ID, Name, sub.Desc, sub.Date
FROM MainTable main
INNER JOIN
(
SELECT * FROM RMF_GetData(main.ID)
) sub
ON main.ContactID = sub.ContactID
I need data from a function in a table format based on some case conditions. Hence i need to join it with main table. But here oracle gives error as "invalid identifier" for main.ID parameter.
SQL & PL/SQL :: Joins With COUNT
Nov 16, 2011I pulled in 1121 SSN's into a table and am using that table as the basis for returning data from other tables...including how many documents a user has in their folder.
My query; however, is only returning 655 rows...it is returning only those rows that have documents in their folders. I want to return ALL rows...WHETHER OR NOT THEY HAVE A DOCUMENT COUNT (count(*)). How can I get all 1,121 rows to return? I would like the output to look like:
SSN LOCATION EMP_STATUS FOL_STATUS COUNT(*)
-- For those folders containing documents:
XXX-XX-XXXX WHATEVER WHATEVER WHATEVER 12
-- For those folders containing 0 documents:
XXX-XX-XXXX WHATEVER WHATEVER WHATEVER NULL
Here is the query in it's current state:
-- Get User/Folder/Doc Count Information
SELECT b.ssn,
b.location,
b.emp_status,
c.fol_status,
COUNT (*)
[Code]....
So again, my problem here is that...not all FOLDERS contain DOCUMENTS...but I still want the folder data lised...I just need it listed with either a zero count (0), or a NULL in the COUNT(*) column.
I'm trying the various joins, but none of them seem to be working.
I've tried the old 8i (+) join as follows:
AND c.fol_id = d.doc_fol_id(+)
I've tried the inner join:
AND c.fol_id(+) = d.doc_fol_id
...and I've tried the 9i method (left outer and full outer) using the following types of notations:
folder c full outer join documend d on c.fol_id = d.doc_fol_id
...so far, no luck. I'm still having only 655 rows returned (the 655 are those folders that HAVE document count > 0. Any folder that has zero documents in the document table just aren't being returned in the query.)
Can't Get Joins On Tables Properly
May 2, 2008why how ever way i try i cant get the joins on the tables properly.... well i know i have to work hard....if join is not proper the data i extract is also not proper.Well now i have 3 tables...
ps_operations
Name Null? Type
----------------------------------------- -------- --------
ASSB_PT_NBR_SEQ_ID NOT NULL NUMBER(8)
OPERATION_NBR NOT NULL VARCHAR2(10)
EFFECTIVE_FROM_DT NOT NULL DATE
DML_TS NOT NULL DATE
DML_USER_ID NOT NULL VARCHAR2(30)
OPERATION_DESC NOT NULL VARCHAR2(70)
HOURS_PER_PIECE_QTY NOT NULL NUMBER(9,6)
PIECES_PER_HOUR_RATE_QTY NOT NULL NUMBER(15,7)
EFFECTIVE_TO_DT DATE
EXTRACT_IND VARCHAR2(1)
[code]...
I have never worked on CPK and UK....so i dont know how to use them to join the tables,.
SQL Tuning - String Of One-to-one Joins
Oct 1, 2013I have a query I am trying to tune. It presently takes anywhere from 15 minutes to two hours to run, depending on how many records the client has. But it needs to run several hundred times, and finish over the course of a weekend. When it runs over, we have problems.
Here's the basic structure of the query:
CODESELECT ...
FROM main_tab,
tab_a,
tab_b,
tab_c,
...
tab_z
WHERE main_tab.client_id = :1
AND main_tab.unique_id = tab_a.unique_id(+)
AND main_tab.unique_id = tab_b.unique_id(+)
AND main_tab.unique_id = tab_c.unique_id(+)
...
AND main_tab.unique_id = tab_z.unique_id(+);
All of the tables are indexed (and statistics are gathered) on the field unique_idMain_tab has an index on client_id.There is a one-to-one join (sometimes one-to-zero, thus the outer join) from the main_tab table to all the other tables.These are static tables, they're wiped and recreated - no changes, inserts, deletes.
By default, the optimizer does a full table scan and then a hash join on every single of the 26 tab_a through tab_z tables, only using the index on main_tab.
By the way I can add indexes, possibly even to the point of adding an index on some tables that would include all the fields found in the select clause on that table. But I cannot change the table structure (by, say, combining these tables together).
SQL & PL/SQL :: Using NVL2 To Control Joins
Jan 5, 2012I am trying to control which tables are joined based on a null value, so I figured I could use the NVL2.
Here is the code as it stands
NVL2(TBL_TRANSACTIONS.EQUIPSVCSEQ, TBL_EQUIPANDSERVICES.LASTWORKORDERSEQ, TBL_TRANSACTIONS.WORKORDERSEQ)
= TBL_WORKORDERS.WORKORDERSEQ (+)
To explain, if first value is null, then TBL_EQUIPANDSERVICES.LastWOSeq = tbl_workorders.workorderseq (+), otherwise join the transaction.workorderseq.
When I try and execute this code, I'm given "ORA-01417: a table may be outer joined to at most one other table." I've double checked, TBL_Workorders is not joined with any other table in any select.
Now, the EquipandServices.workorderseq is joined (+) with another table.
SQL & PL/SQL :: Table Partition Using Joins
Mar 21, 2011can i able to partition the table based on the column which is in another table ??
For example Table X need to be partitioned based on the column in The Table Y . and Table X and table Y has some relation.
SQL & PL/SQL :: Group Functions In Joins
Jul 29, 2013i want to get SUM(salary) by combining both employee and employees table.Look my table structure below:
SQL> select * from employee;
EMPNO ENAME HIREDATE ORIG_SALARY SALARY R MGR DEPTNO
---------- --------------- --------- ----------- ---------- - ---------- ----------
1 Jason 25-JUL-96 1234 8767 E 2 10
2 John 15-JUL-97 2341 3456 W 3 20
3 Joe 25-JAN-86 4321 5654 E 3 10
4 Tom 13-SEP-06 2413 6787 W 4 20
5 Jane 17-APR-05 7654 4345 E 4 10
6 James 18-JUL-04 5679 6546 W 5 20
7 Jodd 20-JUL-03 5438 7658 E 6 10
8 Joke 01-JAN-02 8765 4543 W 20
9 Jack 29-AUG-01 7896 1232 E 10
[code]....
Above, i used separate queries to get the result of SUM(salary) by deptno.Here, I want a single query to get SUM(salary) with deptno.
deptno Sum(salary)
----------------------------
10 30056
20 27132
30 6300
40 4300
SQL & PL/SQL :: Selecting First Row From Multiple Joins?
Apr 2, 2010I'm putting together a path to select a revision of a particular novel:
SELECT e.documentname, e.Revision, e.VersionNumber
FROM Catalog, BookInCatalog
INNER JOIN NovelMaster
INNER JOIN HasNovelRevision
INNER JOIN NovelRevision e
LEFT JOIN NovelRevision s
[code]...
My goal here is to select the earliest revision from the set of Novel revision. The revision field is a string.
When I run the query for Novels that have multiple revisions I get multiple records. If there is just one record I only get one row. If there are two I get four (two for each revision). As the number of revision increases it looks like it just mushrooms from there.
One other challenge is the format of the revision- a revision sequence could look like this:
A
B
C1
C2
C
D
E1
E
So there are "intermediate" revision referred to by a number. In this case I would select revision A, but if I had:
A1
A
B1
B
I would want to select B. I am pretty sure that all the revision are stored in the db in order.Notice that the comparison operator ">" is used in e.Revision > s.Revision. I initially though it should have been "<" because we want to select the initial but the other way gives me the right order (though the wrong results).
SQL & PL/SQL :: Primary Key / Foreign Key Joins
Sep 29, 2010I am working on a new project in OBIEE. I am asked to do the data modeling in the database using oracle sql developer. I have to create the joins based on the requirements. I have the tables created already. But the primary keys for few tables are not defined for few tables. PK-FK joins are also not done properly.
My questions are
(1) If I have to define the primary key for the existing tables can I do that using the alter table command or should I create the table all over again and then define it?
(2) If I have to make the changes in the existing PK-FK joins how do i go about doing that?
