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
ADVERTISEMENT
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 :: 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 & 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.
SQL & PL/SQL :: How To Write Correlated Sub Query
Sep 13, 2010I have employee, location, city tables, I have written following code to use joins
select ename from employee e, location l, city c
where e.c_locationid= l.locationid and l.cityid= c.cityid and c.cityname='XYZ';
The same can be written by using non- correlated sub query as follow..
select ename
from employee
where c_locationid in (select locationid from location where
cityid in (select cityid from city where cityname='XYZ'))
I need to implement the same concept using correlated sub query...
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.
Inline Query And Joins
Jul 31, 2012When to use inline query and to use join.
View 3 Replies View RelatedSQL & PL/SQL :: Create View From Dynamic Query (or Function Returning Query)
Dec 5, 2012I have a dynamic query stored in a function that returns a customized SQL statement depending on the environment it is running in. I would like to create a Materialized View that uses this dynamic query.
View 1 Replies View RelatedSQL & PL/SQL :: Using Correlated Values In Nested Subquery
Sep 1, 2010select rtrim(xmlagg(xmlelement(e, table_name||',')).extract('//text()'),',')
from (
select distinct table_name from tr_products tr join all_instruments v
on tr.PROD_COA_ID = v.PROD_COA_ID
where tr.LEVEL_06_VALUE like t1.COLUMN_VALUE||'%'
or tr.LEVEL_05_VALUE like t1.COLUMN_VALUE||'%'
or tr.LEVEL_04_VALUE like t1.COLUMN_VALUE||'%'
or tr.LEVEL_03_VALUE like t1.COLUMN_VALUE||'%'
or tr.LEVEL_02_VALUE like t1.COLUMN_VALUE||'%'
or tr.LEVEL_01_VALUE like t1.COLUMN_VALUE||'%')
This is an excerpt of a code of a huge query, I didn't want to write it all here because there is no point in doing that since this is the part of the query that I'm actually having problem with, and I think you will be able to understand my question just by looking at this piece of code.
Anyway, this here is actually a subquery in a select-clause of a main query, and apparently it has a (nested) subquery of its own (as seen in the code). I want to reach some values ("COLUMN_VALUE") that are correlated to the parent query (t1 is alias of a table in the from-clause of the main query), and as you can see, I'm trying to reach it from this level 2 subquery. As I have recently found out, Oracle does not allow this, it only tollerates correlation down to level 1.
Here is a scheme of my query:
select something1,
(select something2 from
(select something3 from some_table2 t2
where t1.value = t2.value))
from some_table t1
can this be overridden somehow, is there a workaround for this limitation?
Refreshing Logically Correlated Snapshots Data?
Nov 29, 2010Simplifying the data structure that my problem concern, let's say there are two materialized views between whose data there's a one-to-many relationship [the relationship can be logical without a need of creating any foreing keys].
The data should be as actual as possible respecting the content of the master tables, let's say it shoul be refreshed every 5 minutes.
As far as I know, the jobs related to each snapshot, even if they have a START WITH and NEXT parameter set to the same value, work independently...So: what would be the best manner to synchronize the jobs so as to make sure the data of both snapshots are coherent?
SQL & PL/SQL :: Advance Sub-queries (Exists With Correlated Subquery)?
Jul 18, 2013concept of Exists, With and Correlated Subquery in Sql plus 10g from begining, what are they how do they work with step by step example from basic.
View -1 Replies View RelatedIdentifier Functions UID Correlated With Column Dba_users.user_id
Jul 6, 2012Is the identifier functions UID always correlated with the column dba_users.user_id ?
View 4 Replies View RelatedSQL & PL/SQL :: Building Correlated Subquery Select Statement By Aggregating Timestamps To Months?
Jun 11, 2010I have 3 tables, user_login_event, person and resource_viewed_event. What I want to do have a report for each month, users logged in our application and then show for each month, how many records were created in table person and how many resource views events were logged in resource_viewed_event.
Lets only worry about the timestamp fields in these tables now as I want to use them to join the tables together or at least build correlated subqueries along the months. I have tried several options, all not leading to a desired result:
Left outer join. Works but its incredibly slow:
SELECT
distinct to_char(ule.TIMESTAMP,'YYYY-MM') as "YYYY-MM",
count(distinct ule.id) as "User Logins",
count(distinct ule.user_id) as "Users logged on",
count(distinct p2.id) as "Existing Users",
count(distinct p1.id) as "New Users",
count(distinct r1.id) as "Resources created"
[code]....
Tried the same with left outer joins of temporary tables created through select statements:
select
distinct ule.month as "Month",
count(distinct p1.user_id) as "Users created",
count (ule.id) as "Logins",
count (distinct ule.user_id) as "Users logged in",
count(rv.id) as "Resource Views",
count(distinct rv.resource_id) as "Resources Viewed"
[code]....
Tried the same with left outer joins of temporary tables created through select statements:
select
distinct ule.month as "Month",
count(distinct p1.user_id) as "Users created",
count (ule.id) as "Logins",
count (distinct ule.user_id) as "Users logged in",
count(rv.id) as "Resource Views",
count(distinct rv.resource_id) as "Resources Viewed"
[code]....
another approach is to create my own temporary tables using select statements and create fixed Month values which I can use to directly link the sets together.
select
distinct ule.loginday as "Month",
count(distinct ule.id) as "Logins",
count(distinct ule.user_id) as "Users logged in",
count(distinct p1.user_id) as "Users created",
count(distinct p2.user_id) as "Existing users1"
[code]....
performance is OK with 2 tables but the example above takes forever to execute.
Tried an approach with union but this creates new rows for each table
SELECT DISTINCT p1.MONTH AS "Month",
COUNT(DISTINCT p1.user_id) AS "Users created",
NULL AS "Logins",
NULL AS "Users Logged in",
NULL AS "Resource views",
NULL AS "Resources viewed"
FROM (SELECT To_char(person.created_on_date, 'YYYY-MM') AS MONTH,
[code]....
SQL 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 :: Query On View
May 25, 2010I have created a table "temp" with one column "c_temp_1"
I have created a view "temp_vw" on table "temp".
When I queried the view, I got the table data i.e., column "c_temp_1".
Now, I added another column "c_temp_2" to table "temp"
When I querid the view, I did not got the column "c_temp_2".
But after recreated the view "temp_vw", I got the column "c_temp_2".
My knowledge is view will hold only select statement and will be executed when ever we call the view.
So, when I call the view after adding the second column, I should be able to see second column data as well but why I have to recreate the view?
-- Because of my PC issues, I was not able to paste SQL commands.
ListAgg Query Vs View?
Jan 29, 2013I've generally operated under the assumption that if I have a query that executes properly, I should be able to create a view from that same logic. However, I've had more than one occasion where this seems to NOT be the case.
Today, I have a query using ListAgg that operates just fine when run interactively, but (in SQL Developer v 3.0.04) it gives ORA-24344 when I try to create a view using the exact same statement.
SQL & PL/SQL :: How To Implement Inner View Query
Apr 19, 2011SELECT
DISTINCT CUSTR.TRX_NUMBER trx_number,
CUSTR.TRX_DATE transaction_date,
(
SELECT
MAX(DECODE(fndcatusg.format,'H', st.short_text,NULL,st.short_text, NULL) )
FROM fnd_attachment_functions fndattfn,
[code]....
I have this above query i want to make this query like
SELECT
DISTINCT CUSTR.TRX_NUMBER trx_number,
CUSTR.TRX_DATE transaction_date,
CORRECTED_PROMISE_DATE
FROM
RA_CUSTOMER_TRX_ALL CUSTR
SQL & PL/SQL :: View Is A Recompiled Query
Mar 7, 2010Quote:View is a precompiled sql query.What do you mean by the word precompiled?
Are views useful or beneficial for performanace,
SQL & PL/SQL :: Query To Update Current Value In DBA View To New One
Jul 18, 2012I am looking to build a query to update a current value in a DBA view to a new one.i.e. updating directories based on the current value:
CREATE OR REPLACE DIRECTORY 'DIRECTORY_NAME' AS 'DIRECTORY_PATH'(substr(directory_path, 1,5) + '/&dbname' {i.e. this is different for every database name }+ 'DIRECTORY_PATH'(string after /xyz/)
WHERE DIRECTORY_NAME in
( select DIRECTORY_NAME
from DBA_DIRECTORIES
WHERE DIRECTORY_PATH
like '/xyz/%'
)
i.e. resulting output should be:
CREATE OR REPLACE DIRECTORY 'ABC' AS '/xyz/DBNAME/abc/def/';
(when the directory previously was 'xyz/abc/def/') i.e. basically inserting the db name into the directory.where DBNAME is a variable more directories are added frequently so therefore this needs to be a dynamic procedure to change the directories in the db.
SQL & PL/SQL :: Query From The View Returning Zero Records
Feb 27, 2012Im running the following query in DB - Prod2
select *
from t_act_rwrd_reimb_stay a
where reimbursed_amt < 0
and invoice_date = '01-JAN-1900'
and not exists ( select 'x' from t_act_rwrd_reimb_stay b
where a.GPM_ID_STAY = b.GPM_ID_STAY
and reimbursed_amt > 0 )
The above table t_act_rwrd_reimb_stay --> is from a view on the database Prod2 and this view is pulling the data from the database prod1 via dblink
When I run the same query on Prod1 it returns 3 rows. Is there any reason this is not fetching data on prod2 view? or whatz wrong with the above query
or for example if I run the above query as follows with the dblink "@prod1" it returns the data properly
select *
from t_act_rwrd_reimb_stay@Prod1 a
where reimbursed_amt < 0
and invoice_date = '01-JAN-1900'
and not exists ( select 'x' from t_act_rwrd_reimb_stay@prod1 b
where a.GPM_ID_STAY = b.GPM_ID_STAY
and reimbursed_amt > 0 )
PL/SQL :: How To Use Materialized View And Its Data From A Query
Nov 15, 2012I have got a simple materialized view question.
I have a view which is taking long time to get back results and this view is being used in various user queries. I noticed that the SQL of the view access some tables, data of them changes rarely. So it makes sense to retrieve that data in a materialized view and somehow re-use it.
My question is how can I use the materialized view and it's data from a query.
SQL & PL/SQL :: Dynamic Query In View For Correct Column Name
Feb 20, 2012I don't know what column name would there for my new view. so can i use dynamic SQL in View so that I can get correct column name?
View 2 Replies View RelatedPerformance 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?