SQL & PL/SQL :: Select From View
Mar 1, 2012
I am using Oracle Database 9i. I have created a view as follows:
CREATE OR REPLACE FORCE VIEW ipl.abc_test AS
SELECT '10' dsgn, TRIM (b.oc1) code, b.grp, b.POLICY, b.premcode,
b.receipt, b.recptdt, b.PLAN, b.term, b.paymode, b.sumass, b.datcom,b.duedt, b.instl, b.lprem, b.rprem, b.sprem, b.extprem, b.totprem,b.oc10, b.oc9, b.oc8, b.oc7, b.oc6, b.oc5, b.oc4, b.oc3, b.oc2,b.oc1, b.bill_oc1 billno, a.fprdate riskdt,
NVL (a.bmon, TO_CHAR (a.fprdate, 'YYYYMM')) bmon, a.entryopt,
a.extprem3 suplext
[Code]...
View created properly, But when i select from this view this giving message missing right parenthesis. For information the select statement of the view gives multiple rows. Where is the problem.
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Apr 25, 2012
We wrote one data load process to load GZ files into Database.during process we will change client facing view definitions to backup table so that we can work on base tables.
This view definition changes are related to FROM and WHERE clause (not columns/type). during load process, client/user may connect to current server and accessing these views. My question is what will be the reflection of changing view definition while user is accessing view?
I created a scenario-
STEP1: Created a view-
create or replace view view_01 as
select object_name from dba_objects union all
select object_name from dba_objects union all
select object_name from dba_objects union all
[code]....
View definition is replaced by new definition while select is executing on that view. select returned number of records as per view definition one.
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Dec 7, 2006
I am using some UPS shipping software that imports shipping information based on an order number that the user enters and we are having performance problems. In the software's configuration you choose one database object (namely a table or view) to get the information from. I have created myView that selects from multiple tables, lookup tables, etc. I must use a view because the software only has the ability to add a " and <importKeyThatIHaveDefined> = <valueEnteredByUser>". For instance " and order_number = 123". It cannot join multiple tables, etc. The address_field1 info is the same for each record with the same order_number so I can just get the first row (or any row with order_number = <enteredOrderNumber> for that matter).
When I first looked at this it was created as something like this:
select order_number, line_number, order_number || '' || line_number as ol, address_field1 from order;Keep in mind that there are more than just this table and more fields selected. They are all joined correctly (for lookup values etc.).
The concatenation was determined to be the bottleneck in performance. ol was defined as the import key to be used and the users were just entering the order number plus a 1 to get ONLY the first line number. Each order (usually) has more than one line and even the line number is not necessarily unique for each order. For instance, order 123 may have line 1 twice and line 2 once.
select order_number, line_number, address_field1 from order where rownum = 1;
The software appended the " and order_number = 123" as expected but because rownum = 1 had already been executed (before the and order_number = 123" the view only returned one row even WITHOUT the order_number = 123.
I need to return only ONE row for a given order number EVEN IF there are multiple records with the same order_number and line_number. Using "where order_number = <enteredOrderNumber> and line_number = 1" is not necessarily unique so that won't work.If I can't make it work this way and can't use the rownum = 1 what options do I have?
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Jun 7, 2011
I have been out of work for 2+ years. Am about to start a job next week doing Oracle back end, Forms, and Reports development among other things. I was asked if I could take a look at 3 report requirements and give an estimate on how long it would take to correct errors in these reports. All I have is a user requirement document stating what the report is currently doing and what it should be doing, a partial screen print of an Oracle Form showing correct data, and a sample report page showing incorrect data.
I am finding it rather difficult to give an estimate without seeing tables, relations, code, etc. Is it me or does this seem nearly impossible?I do not have access to their system yet so cannot view the database or run select statements, run the report, etc. All I have are the documents I listed above.
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Apr 8, 2012
1. I Wnat to analyze the buffer cache hit ratio. This is what i did.
DECLARE
bufcac NUMBER(10, 2);
BEGIN
[Code]....
2. I would like to analyze the PGA and determine what percentage out of the maximum allocated PGA is being used. I tried the code below but can't find the percentage. Sad
SELECT NAME,
To_char(Decode(unit, 'bytes', VALUE / ( 1024 * 1024 ),
VALUE), '999,999,999.9') VALUE,
[Code]....
Apart from the little problem I have with number 2, not figuring out how to get the precentage seeing that all the data is store in the field VALUE.
I would also like to create a view that has both 1 and 2 in it, but whenever I try creating it, I got and error stating and INTO clause is expected.
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Jun 11, 2012
I'm trying to create a view that includes both custom and delivered tables. The SQL code produces the desired results in SQL Developer. However, when I create and test the view using that code, I get very different and incorrect results. The SQL part of the view is below:
SELECT j.emplid, pt.deptid, pt.y_policy_id, pt.effdt, pt.title, pt.comments, pt.y_policy_covg, pt.doc_url
FROM psoprdefn a
, ps_job j
, ps_y_policy_tbl pt
WHERE substr(a.oprid,1,1) = '0'
AND a.emplid = j.emplid
AND j.job_indicator = 'P'
AND j.effdt = (SELECT MAX(effdt) FROM ps_job
WHERE emplid = j.emplid AND empl_rcd = j.empl_rcd AND effdt <= sysdate)
[code]....
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Dec 23, 2010
I have a view, below, which does few left outer joins to the same V_MARKET view to get data i need. When I run SQL by itself, ut runs pretty fast, 2-5 seconds. But when I do "select * from V_DEPT_DATA where busines_date = '01-APR-10'", it takes more than 10 minutes to run. I added all needed indexes and still have problems with it .
CREATE OR REPLACE VIEW V_DEPT_DATA
AS
SELECT
v1.business_date ,
v1.division ,
v1.department ,
v1.account ,
en.trader ,
[code]........
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Aug 16, 2013
I created a user and granted connect, resource to the user. but trying to select columns from the view USER_HISTORY$,it's showing no value, i tried to login the user several times, but it's displaying no value, any particular reason or any minor mistake?
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Oct 27, 2011
My need is to grant priveleges for select on view without granting on nested tables.
Actual problem is that I can grant privileges for particular user, but can't grant privileges for user group.
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Jun 13, 2010
currently i m going through some dumps for my OCA-11g prep.I came across one sentence :A view cannot have an ORDER BY clause in the SELECT statement.well this statement is false and the explanation given was :
Query operations containing ORDER BY clause are also permitted, so long as the ORDER BY clause appears outside the parentheses.
The following is an example of what I mean: CREATE VIEW my_view AS (SELECT*FROM emp) ORDER BYempno.
but when i tried running the query like this :CREATE VIEW my_view AS SELECT*FROM emp ORDER BYempno ,it worked w/o giving parentheses.
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Aug 31, 2012
Need a trigger in view with select statement that means
CREATE OR REPLACE VIEW TEST_VIEW AS SELECT * FROM TEST_TABLE;
CREATE OR REPLACE TRIGGER TEST_VIEW_TRG1
INSTEAD OF DELETE ON TEST_VIEW DECLARE
BEGIN
Dbms_Output.Put_Line('STATEMENT TRIGGER.');
END;
i wanted to use select statement instead of delete.How can i get that
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May 28, 2012
I need to view the rows of the result of a select query in table format in GUI application.I have used XMLELEMENT to somewhat match the scenario to display as ','(comma) separate values as b belwo
SELECT RTRIM (XMLAGG (XMLELEMENT (e, EMPNO || ',')).EXTRACT ('//text()'),
',')
AS empid,
RTRIM (XMLAGG (XMLELEMENT (e, ENAME || ',')).EXTRACT ('//text()'),
[code]...
But the case is I need to display the value in table format Horizontally as below
EMPIDemployee nameDEPID
778
278CLARK10
397MILLER
934KING
[code]...
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Jun 20, 2011
I have a materialized view (smpl_mview) if i want to see the SELECT statement written for the materialized view, how can i see/retrive select stmt?
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Jul 24, 2011
I'm using Oracle 9i Enterprise edition, Is there a select statement to view transaction log for specific date?
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Aug 20, 2012
[URL]...
I have a quite complex view that selects from approx 10 long tables (approx 4M records each) and build one "customer sentence" pre customer id. I will be always getting just one row from this view, eg. select * from my_view where party_id = XYZ. I'll NEVER EVER select the whole view.
The problem is that running a query:
select * from my_view where party_id = XYZ takes really long time, while putting the party_id = XYZ condition directly into the view executes in 0.0 seconds.
After putting a ORDERED FIRST_ROWS(1) hint into a view the execution plans seems to be the same (or very similar) for both queries. Unfortunately, I can not transfer anything but screenshot from the environmnet - therefore I paste the exec plans as screenshots only - pls follow the link: [URL]...
View DDL:
create or replace view my_view as
select /*+ ORDERED FIRST_ROWS(1) */ pt.party_id
pt.party_id as id_klienta_mdm,
pt.master_reference_no as id_klienta_ref_mdm,
[code]...
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Jan 17, 2013
can we change the existing materialized view to normal view? if yes how?
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Dec 11, 2012
I'm trying to create a Materialized View on a remote database from a simple view. The reason is, the data owners don't want to grant explicit tables privileges to external subscribers.
A new schema is created to publish data in the form of a view. I've created mlogs on the master tables, and granted them to the subscriber, but it's still complaining about a missing primary key on the view. A primary key does exist in the master table.
Is there another work around for this situation without having to work inside the data sources' environment?
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Oct 8, 2010
is it possible to create primary key on view and use this view for creating foreign key .
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Jul 28, 2010
Are oracle view have Dynamic view function?
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May 2, 2012
I have a materialized view "pro_mview",I am trying to refresh the MVIEW by using the following statement.
EXEC DBMS_MVIEW.REFRESH('pro_mview','C');
But I am getting the below error.
*
Error at line 1:
ORA-12008: error in materialized view refresh path
ORA-00942: table or view does not exist
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2256
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2462
ORA-06512: at "SYS.DBMS_SNAPSHOT", line 2431
ORA-06512: at line 1
I am able to fetch the data from that materialized view(pro_mview).
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Apr 26, 2011
difference between view and materialized view?
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Aug 12, 2013
what would be the difference between a view and a materialized view? whether DML possible on a view? i think error occurs if DML tried on a view which is a combination of two or more tables, whether DML possible on a materialized view?
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Mar 3, 2011
I have a table with around 80 columns. All i need is to select first 40 columns.
Is there any way to select first 40 columns without giving all the 40 Column Names in select clause.
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Jul 4, 2010
i want to select dynamic column names in my select statement in my function.
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Oct 5, 2012
I M USING APEX 4.1 AND CREATED SELECT LIST ON PAGE, I WANT TO SHOW MIN VALUE OF THE SELECT LIST FOR THAT I WROTE IN THAT SELECT LIST PROPERTIES UNDER DEFAULT TAG MIN; AND CHOOSE PL/SQL EXPRESSION BUT ITS GIVING ERROR "Error computing item default value for page item P1_PRODUCT."
BUT IF I HARDCORE THE VALUE CONTAINING IN MY DATA LIKE PRODUCT ID = 1, I HARDCODED IN DEFAULT VALUE 1 AND SELECT PL/SQL EXPRESSION IT WORKS.
BUT ITS NOT DONE LIKE THIS I WANT TO SELECT BY DEFAULT MIN VALUE OF THE SELECT LIST, SO THAT THE DATA SHOULD BE DISPLAYED ACCORDING TO THAT.
THE EXACT REQUIREMENT IS TO ENTER THE SELECT LIST DEFAULT VALUE IN SESSION SO THAT DATA IS TO BE DISPLAYED.
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Dec 29, 2010
Why Blind select is better than Conditional select Statement?
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Dec 1, 2011
Can we create view in another view
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Aug 13, 2010
I have a view ( from many tables) , an error view in wich i monitor errors that appear in my project. This view should be empt always but whenever a error occurs the view shows me this. I wanna put a trigger or something like that on that view to send me an e-mail whenever a line is inserted in that view. ( I don't wanna use a job for that to make a count because this will affect the entire database).
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Dec 5, 2012
If you have one table called CUST_ACCOUNTS and a view called CUST_ACCOUNTS -- and then you want to select from the view and not the table.Is there a prefix for views or something that I can have in front of the name to specify it's the view I want data from?
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Dec 27, 2009
Which is better to use of Views and Materialized views so as to have good performance ? Also I need to search for a particular value in the view. Any function in sql to implement this ?
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