SQL & PL/SQL :: Creating Views - Percentages And Multiple Tables

Oct 10, 2013

I'm having trouble with a little assignment.

"Create a view named vuPassFailRate that will show the pass rate and fail rates of each test."

I have a table named Test_ID containing the following columns:

TEST_ID
TEST_NAME
PASSING_GRADE

And another table named Test_History containing the following columns:

TEST_ID
STUDENT_ID
SCORE

I'm assuming i have to create an inline view, and to work out the pass/fail rates i need to do something along the lines of (For pass rate) Where SCORE is greater than or equal to PASSING_GRADE, and TEST_ID equals TEST_ID, divide by a count of SCORE and multiply by 100. I just cant work out the nested select statements, and work out the formula using two columns in two tables.

I have been staring at this problem for so long now i cant see the wood for the trees.

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PL/SQL :: Creating Views - Percentages And Multiple Tables

Oct 10, 2013

I'm having trouble with a little assignment. "Create a view named vuPassFailRate that will show the pass rate and fail rates of each test." I have a table named Test_ID containing the following columns:

TEST_IDTEST_NAMEPASSING_GRADE 

And another table named Test_History containing the following columns:

 TEST_IDSTUDENT_IDSCORE 

I'm assuming i have to create an inline view, and to work out the pass/fail rates i need to do something along the lines of (For pass rate) Where SCORE is greater than or equal to PASSING_GRADE, and TEST_ID equals TEST_ID, divide by a count of SCORE and multiply by 100. I just cant work out the nested select statements, and work out the formula using two columns in two tables. I have been staring at this problem for so long now i cant see the wood for the trees. 

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Jun 20, 2012

I want to do a tree view based on the following tables in APEX:

create table plattform (
id number,
name varchar2(200))
create table environment (
id number,
plattform_id number,
name varchar2(200))

[code].....

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Creating Trigger For Views

Sep 21, 2008

I have a table tblcustomer and a view called vworder. I need to create a trigger such that any data being added into vworder first checks if the field customerid has the data in customerid of tblcustomer.. all it has to do is spit out a error "Customer ID not found"

So I created a view such as

Quote: create or replace TRIGGER trig_order
BEFORE INSERT OR UPDATE ON vworder
FOR EACH ROW
DECLARE
cust_id VARCHAR2(20);
BEGIN
SELECT customerid INTO cust_id FROM tblcustomer WHERE customerid = :new.customerid;
EXCEPTION
WHEN NO_DATA_FOUND THEN
Raise_application_error(-20000, 'Customer ID Does Not Exist');
END;

But it comes with error

Quote: ORA-25001: cannot create this trigger type on this type of view 25001. 00000 - "cannot create this trigger type on views" *Cause: Only INSTEAD OF triggers can be created on a view. *Action: Change the trigger type to INSTEAD OF.

I am not an expert at all and I need to finish this today itself.

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Creating Self-updating Views With Data Selection?

Aug 4, 2011

I've got a Source Data in complex relational formFor reporting purposes, a simpler, less normalized data model is neededThere are two Target views from the Source Data: one of them with full access to all datathe second one with access only to a subset of the data (same columns, but not all the records)For both target groups, a separate schema shall be available, each containing only relevant dataToday, these schemas are physically located on the same DB instance and host as the source dataA daily refresh is sufficientA later relocation of the reporting schemes to other DB instances shall be possible without major changes neededOracle 10g should be used I tried to accomplish this using Materialized Views (Materialized seems better since there will be sometime a need to have all the apropriate data somewhere else, geographically, AND it provides Complete Refresh from the Source), but there is a problem: when creating the MV there is a possibility to type 'SELECT *' - but after execution it changes into real columns names. It is important because later after adding a new column into Source Data it WILL NOT appear in MV after refresh.

I also thought about Data Guard, Streams and RAC, but I think only in the Materialized Views you may choose the data to show (rows, columns).

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SQL & PL/SQL :: Query That Will Give List Of Views Using Three Tables?

Aug 16, 2011

I wanted a query that will give me the list of views using three tables

when i fire

select * from dba_views where text like '%SELECT%';

it is giving me error as expected number got long.

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ODP.NET :: Connection Open But No Tables Views Or Procedures?

Oct 5, 2012

Going through my first attempt ever to connect to a Oracle database with a .Net application. Using Visual Studio 2012, I have downloaded and installed the latest version of odp.net, actually both the 32 and 64bit versions.

Application is targeting the 4.5 Framework, Latest version of Entity Framework installed (but not important I think at this point) Added a reference in my project to the Oracle Data Provider ( tried with both 2.0 and 4.0 )

Created a connection string with EZ Connect, stored in web.config file. I have tried 2 different projects to use EF and one without. Trying to create a edmx or using a datasource adapter brings up the connection wizard or prompts to use the existing one, but no matter what I try, there are no tables, views or procedures listed.

From Server Explorer, I can open the Data Connections and verify that the connection to the Oracle database is Open. During the Connection Wizard, there were no errors, and all the databases available were listed. Yet, connecting to and opening the connection to this specific database or anyone for that matter no tables, views or procedures are listed.

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SQL & PL/SQL :: ORA-30506 - System Triggers Cannot Be Based On Tables Or Views

Jan 24, 2012

i'm trying to audit ddl actions(a strange "disappearing of a table every couple of days) on a specific table.

i want to trigger those actions, but not on a database level, but a table's level only(or at least a user schema's).

when i execute

CREATE OR REPLACE TRIGGER system.audit_trg BEFORE DROP ON tu2.d
BEGIN
INSERT INTO

[Code].....

i get an error
ORA-30506: system triggers cannot be based on tables or views

and if it is - how do i adjust my plsql?

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Server Utilities :: Views Linked To External Tables

Mar 28, 2011

i just posted another topic where i heard about external table and i had a few questions concerning them. I thought it was best to create a new topic than to continue on the other one...

I noticed that to create an external table the CTL is like this:
CREATE TABLE emp_load (FIELDS description)
ORGANIZATION EXTERNAL (TYPE ORACLE_LOADER DEFAULT DIRECTORY ext_tab_dir
ACCESS PARAMETERS (RECORDS FIXED 62 FIELDS (employee_number CHAR(2),

[Code]...

1) This creates an external table, but, is it possible to Create a normal table in a CTL file? For physical tables, the table has to exist right?

2) if you create a view linked to 2 external tables and if the CSV files are updated each day, the external tables will be updated automatically, and the view will be updated as well?

3) Can't there be any synchronisation problems?

4) What happens if a select request (or someone requests on the view) while the CSV file is being updated?

5) Is there anyway you can protect the accesses from those tables/views when the CSVs are being updated?

6) Is it possible to create an index on these sort of tables?

7) Is it possible to index a view?

8) Are external tables visible on a tool like sql developper?

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Jul 9, 2012

NGFID;RECTYPE;RECNAME
25;7;POLES
PARENT
CHILD;1401;9845075;2020
817;8;SUPPORT
PARENT
CHILD

Required output:-

AREA_SRNO = 1
AREA_NAME = '3rivieres.export.ngf'

File :-mauri.export.ngf

NGFID;RECTYPE;RECNAME
257;7;POLES
PARENT
CHILD;1401;9845075;2020
8174;8;SUPPORT
PARENT
CHILD

Required output:-

AREA_SRNO = 2
AREA_NAME = 'mauri.export.ngf'....etc

CREATE TABLE NGF_REC_LINK
(
AREA_SRNO NUMBER(2),
AREA_NAME VARCHAR2(40),
NGFID NUMBER(20),
TABLENAME VARCHAR2(40),
PARENT VARCHAR2(200),
[code].......

find the ctl file (ngf_test.ctl) and modify the ctl file as per my requirement.

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Sep 30, 2011

Is it possible to create trigger on the various tables and views exists (i.e. dynamic performance views) in data dictionary, when ever any DML operations performs by Oracle it self?

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Jan 9, 2013

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Apr 16, 2013

I'm trying to create multiple functions, add them then minus 1 in a package. I'm at my wits end as to what I'm not doing correctly as the package gets created fine but the package body is giving me compilation errors.

create or replace package addfunction as
function q1 (num1 IN NUMBER, num2 IN NUMBER) return number;
function q1 (num1 IN NUMBER, num2 IN NUMBER, num3 IN NUMBER) return number;
END;
/

[code].....

Warning: Package body created with compilation errors

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Dec 3, 2011

So I'm here creating some tables and if theres a guide where I can take a look at some Constraints Declarations , Mostly cause i have some values on the table that cannot be negative so i need to set constraints to be positive

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Aug 19, 2013

Explain in detail about using constraints in creating tables.

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Jan 26, 2011

I have created a softlink to a data file orig_file.dat using the command ln -s orig_file.dat orig_file_link.dat

Now is it possible to create an external table using this linked file orig_file_link.dat

I am using this linked file to minimise the space usage because every month we get different data files and external table creation is done as a batch job copying the data file to another file whenever a new data file arrives. External table is created with the new file. so i need to check whether it is possible with the linked file instead of copying the file.

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Oct 30, 2011

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is it simply SQL>grant delete on <TABLESPACE> to <new user>; ? or do i need to specify the grant the delete on my tablespace to new user?

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Jul 19, 2010

I am facing a problem while creating a program using oracle forms.These two table i am using in creating following program .

SQL> desc electricity ;
Name Null? Type
----------------------------------------- -------- ----------------------------
ID NOT NULL NUMBER
NAME VARCHAR2(40)
PREV_READING NUMBER(20)
PRESENT_REDAING NUMBER(20)
TOTAL_UNITS NUMBER(30)
AMOUNT NUMBER(30)
[code]....

What i want that whenever user writes a value in "PRESENT_Reading" Column then it stores value in "ID table" .For example if current month is July ,Then when user write a value in present Reading column ,it stores it in JULY Column of Id table ..i Write following trigger (Key_commit) On present_reading Column .

if sysdate=to_char(sysdate,'MON','Jan') Then
:electricity.PRESENT_REDAING := :ID.Jan ;

elsif
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:electricity.PRESENT_REDAING := :ID.Feb ;

elsif
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:electricity.PRESENT_REDAING:= :ID.MAR ;

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Nov 5, 2012

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SQL & PL/SQL :: Insufficient Privileges When Creating Tables Using Execute Immediate?

Apr 30, 2010

SQL> connect sys as sysdba
Enter password:
Connected.
SQL> grant dba to temp;

Grant succeeded.

SQL> connect temp
Enter password:
Connected.
SQL>
SQL> create or replace procedure tempproc
2 is
3 begin
4 execute immediate 'create table temp_table(a varchar2(10))';
5 end;
6 /

Procedure created.

SQL> exec tempproc;
BEGIN tempproc; END;

*
ERROR at line 1:
ORA-01031: insufficient privileges
ORA-06512: at "TEMP.TEMPPROC", line 4
ORA-06512: at line 1

SQL>
SQL> declare
2 begin
3 execute immediate 'create table temp_table(a varchar2(10))';
4 end;
5 /

PL/SQL procedure successfully completed.

SQL> desc temp_table;
Name Null? Type
----------------------------------------- -------- ----------------------------
A VARCHAR2(10)

Why am I not able to create a table from procedure using execute immediate?

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This is just for learning purposes. What if I would like to create my own materialized view utilizing only tables and a job.

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Aug 4, 2011

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CREATE MATERIALIZED VIEW mv_employee_name
AS SELECT EMPLID, EMPL_NAME
FROM VEMPDATA@REMOTEDB
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I am wondering how the refersh happens or how do I specify the refresh clause.REFRESH FAST option is looking for VIEW LOG on the master table but in this case its a remote view, so I cannot create any object on remote db.

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Apr 4, 2011

I created a mv for one of the partitioned tables but on viewing the mv capabilities it still shows PCT is set to 'N'.

create materialized view MV_summary_SEC
refresh fast
start with sysdate
nEXT SYSDATE + 1/24
enable query rewrite as
[code]....

If i remove the sub query and create the mview like this,then PCT is enabled.

create materialized view MV_summary_SEC
refresh fast
start with sysdate
nEXT SYSDATE + 1/24
enable query rewrite as
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from summary ,date_table
where PERIOD >= DATE_TABLE.CUR_DATE
group by PERIOD

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Dec 30, 2010

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I have dropped all tables and OEM shows tablespaces are empty. Then I run a script to recreate all tables. Most of the tables don't get created because their TS is full. After the script to recreate all tables runs, the main tablespaces are full, more full than on the production machine. I have also tried ALTER TABLESPACE xxx COALESCE; on each tablespace right after dropping all tables and before recreating them to reclaim free space. Why is it full? I've only dropped and created the tables, there shouldn't be any data in them yet.

ORA-01659: unable to allocate MINEXTENTS beyond 2 in tablespace PLUS_T...The backup instance was already there, all I did was drop the tables. Here's what I ran on prod to build a script to recreate the tables on backup server. Got it off Burleson somewhere.

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Dec 9, 2010

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Aug 20, 2010

I am writing a procedure that will be called from a java wrapper.

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Create or replace proc_name ()

update table........

delete from ..........

CREATE GLOBAL TEMPORARY TABLE TSAAG
( supplier_id numeric(10) not null,
supplier_name varchar2(50) not null,
contact_name varchar2(50)
)

insert into............

drop table TSAAG;

End;

creating a global temp table inside a procedure is expensive...

Do we have anything like creating table before and calling the instanse of it in procedure.

Do we have any alternatives to this..

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Feb 21, 2010

I'm trying to do a sum over 2 different tables but can't get it to work...This is the idea:I have a table A with client ID, time-id (per day), purchase amount and segment code.

In another table (let call it B) I have a lot of client ID's and also their purchase amount, time-id and segment code. I want to sum the purchase amount for every client from table A and B for clients with certain segment code from table B.

This is what I have now:

select client_id, purchase_amountA+ purchase_amountB from tableA, tableB where
A.client_id = B.client_id
and time_id between 20090101 and 20091001
and B.segment_code = 'A'

This does the job, but it selects only client_id's which are in both tables. I want to select all client_id from table B with segment_code 'A' and add the purchase_amount from table A to their purchase amount from table B, at least, if they have any purchase amount in table A.

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Sep 30, 2010

Video Rental Shop

Each customer has a video card , When Customer rent a CD , Shopkeeper register an issue date and a Return Date . If customer return CD after Return Date Then There will be a fine of 2 Dollor .

After every 6 Months The shop Keeper review each customer Account , and Send Gifts to those customer whose Total Amount is More than 50 Dollar .and also send letters to those whose Fines Are More than 20 Dollor .

Now I am unable to understand that how many table i need to create for this .

What i have created so far is given below ,

When Customer Rent a CD then Shopkeeper will submit Following Information .

Customer_id 101
Issue DateDATE
Expected_return_dateDATE
Original_return_date-
Fine -
Total_Amount -

And at the time of return , he will Put these information .

Customer_id 101
Issue DateDATE
Expected_return_dateDATE
Original_return_date DATE
Fine 2
Total_Amount5

But Do i need to create another table for each customer also ? That will store customer total amount , total Fines ,and shopkeeper will view it after every six months. Which type oo table i need to create ?

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