Retrieve Info From Multiple Databases / Insert Into Central Database Via Database LINKS
Jun 10, 2013
I am trying to retrieve info from multiple DBs and insert into a central DB via DB LINKS.The links are retrieved via a cursor.
However I keep coming up against 'PL/SQL: ORA-00942: table or view does not exist'..how to handle db_links using a cursor in a pl/sql block? The code is as follows:
DECLARE
db_link_rec VARCHAR2(30);
CURSOR db_link_cur IS
SELECT DB_LINK
from MESSAGING_PROD_LIST;
BEGIN
OPEN db_link_cur;
LOOP
FETCH db_link_cur INTO db_link_rec;
EXIT when db_link_cur%NOTFOUND;
[code]....
At my Workplace we have a large Orcle 11g Database with 30 different tables for production control issues.I try to get a couple of different information from the database, so i started with SQL Query's, but for this problem i was not able to write an working query.
In this case i have 2 tables:
Table 1: ID ;ORDER_NR ;DESCRIPTION ;CREATE_DATE 1 ;A500236 ;CLEAN HOUSE ;02/20/2012 2 ;A623555 ;REPAIR CAR ;01/10/2012 3 ;A866944 ;MAINTAIN EQUIPMENT ;02/11/2012
And the result of my Query should look like this: ORDER_NR;DESCRIPTION ;CREATE_DATE;A_STAT_AGE;R_STAT_AGE;U_STAT_AGE A500236;CLEAN HOUSE ;02/20/2012 ;5 ;3 ;1 A623555;REPAIR CAR ;01/10/2012 ;42 ;39 ;38 A866944;MAINTAIN EQUIPMENT ;02/11/2012 ;15 ;4 ;3
The age of my query result should be calculated from the Create date of the Order.I want to know 2 things, one is how old was the Order when they reached that status A, R and U.The second this ist, how long did the order remain on the stat A,R and U (and if possible all other status also)It could happend that not each order reaches each status, so it ca go directly from A to you in this case i want display a wildcard in this row/column
I am having a little trouble retrieving info from my mock database.
here are my definitions: response.setHeader("pragma", "no-cache"); response.setHeader("Cache-control", "no-cache, no-store, must-revalidate"); response.setHeader("Expires", "01 Apr 1995 01:10:10 GMT"); response.addHeader("Cache-Control", "post-check=0, pre-check=0");
[code]...
and here is my select statement. ds = (DataSource) context.lookup(dSource); conn = ds.getConnection(); stmt = conn.prepareStatement("select add_date, campus, name, leader from TABLENAME where id = ? order by xbbo_add_date"); stmt.setString(1, colleagueID); result = stmt.executeQuery();
***basically I am trying to retrieve this info from my db, and list it out in a HTML table. I am writing this on a JSP page. Also, where i want the retrieved data listed, I am using for ex: <%=name%>
I'm currently assessing the design/performance of a Distributed System in which hundreds of Field reps have local Oracle DBs (10.2.0.4) on laptops & have to update a remote database (11.2.0.1) via a PUBLIC database link. Field data (millions of records) collected daily is synched from the local to the remote DB & vise versa through this database link. I have 2 concerns here:
1. Is the database link the best option for such a configuration? (recently field reps have been complaining about the slowness in synchronizing data between local & remote DBs). If not, what other options are available for such processing?
2. I've read a lot about security concerns with using PUBLIC database links, but haven't seen any documents to proof they're a majority security issue. why PUBLIC database links are considered not to be very secure?
I am using SQL Developer.I am self-teaching myself PL/SQL. What I am trying accomplish is to run a select query across many database links at runtime and to insert that query onto a local table. So far, I have only gotten as far as querying the database link names. I am stuck at where my variable calls the database link name. It does not recognize the database link name, and I can't quite grasp the reason why. Below is the first part of my script which does retrieves the column values no problem:
If I break the script down to the bare select query, it will query absolutely fine.If I run the script in its entirety, it will not pick up the variable dbl as a dynamic database link. 02019. 00000 - "connection description for remote database not found"
If I comment out line 031 and prevent the looping of querying of database links (which will only fetch the first value of db_link from dba_db_links), the script will complete and I will have a row inserted into my local table.
I am suspecting it's the looping that is incorrect but I understand it is not going to do anything beyond line 059.
A website requires to display consolidated data from databases located in different geographical regions (India, London and New York). The application server for the website is hosted only in one location India. What are the techniques that can be used for faster retrieval of data from all 3 databases?
Note: There is no need of real time data retrieval from different regions; however the user should able to view the updated data at predefined intervals.
I know how to use database links in various forms, but I've been trying to think through how the authentication works for a connected user link in 11g. If I create the link like this,
create public database link using 'orcl';
then any user can use the link, provided they have an identical username/password in the two databases. With pre-11g passwords, it was understandable: the password was salted with the username, so the hash of the password would be the same in both databases, and I assumed that the logon through the link used some sort of IDENTIFIED BY VALUES mechanism. But in 11g, the salt will different in the two databases. So the hash will be different. And of course Oracle never stores the actual password. So I don't see how the authentication works.
I would like to know if we can insert 300 million records into an oracle table using a database link. The target table is inproduction and the source table is in development on different servers.The target table will be empty and have its indexes disabled before the insert. if this can be accomplished in less than 1 hour.
I know how to use database links in various forms, but I've been trying to think through how the authentication works for a connected user link in 11g. If I create the link like this,create public database link using 'orcl';then any user can use the link, provided they have an identical username/password in the two databases. With pre-11g passwords, it was understandable: the password was salted with the username, so the hash of the password would be the same in both databases, and I assumed that the logon through the link used some sort of IDENTIFIED BY VALUES mechanism. But in 11g, the salt will different in the two databases. So the hash will be different. And of course Oracle never stores the actual password. So I don't see how the authentication works.
Im trying to generate a member procedure that allows the user to manual enter the required information via substitution variables. The manual INSERT INTO statements work but I cant seem to get it to work within a procedure.
Here is the code for the type, table andstandard insert:
CREATE TYPE toy_typ AS OBJECT (toy_id NUMBER ( 5), toy_name VARCHAR2 (20), toy_cost NUMBER ( 4),
[code]...
the procedure complies but i get a warning error. When i also try to execute the code with either set values or substitutions i get either not enough or to many values error.
the thread title was a bit confusing, couldn't come up with anything short to describe the question. What I am looking for is a query which will put records into groups based on matching values in one of two columns. So if two records have a matching value in column 1 or column 2 they are in the same group. See the example bellow and expected output for a "better" explanation:
--setup CREATE TABLE foo (foo_id NUMBER NOT NULL PRIMARY KEY, record_number NUMBER, record_value VARCHAR2(1));
[Code]...
--expected output
group# foo_id record_number record_value 1 1 1 A 1 2 1 B 1 3 2 B 1 4 2 C 2 5 3 D 3 6 4 E 3 7 5 E
My initial thought is that is feels a little bit like the sequential seat problem but not quite close enough. I know it could be done iteratively with PL/SQL but I am thinking there must be a way to do it in SQL I am not seeing yet.
If we insert a row in a database table then the new row stays at database buffer cache in SGA (until commit), right?. The target table is not affected (before commit). The new row is saved after commit.
I saw a concepts at Sybex oracle 10g oca book (Page 406) as follows:
" INSERT statements use little space in an undo segment; only the pointer to the new row is stored in the undo tablespace. To undo an INSERT statement, the pointer locates the new row and deletes it from the table if the transaction is rolled back. "
My question is If the row is not saved at table before commit, if we issue rollback then how oracle delete from table? I think the new row is deleted from database buffer cache in SGA.
I would like to let the customer edit the item help text. Is it possible to retrieve item help text from my own custom database table based via a PLSQL function call or something similar?
Its a simple query to retrieve data with the Order_ID.If the record is there its fine and can retrieve the data. But my query is to retrieve the list of order_id which has no records in database.
We are getting a consultant to upgrade an Oracle 9i installation to 11g R2. The current installation has 6 different databases installed on the same server. Each database is a different customer so for reasons of security we have requested that this be split into 6 virtual machines with one database per machine.
The consultant suggested that they could install the 11g database once and then just make copies (which would all have the same instance name. We are told that the TNS names can be configured so clients are directed to the right database.
I also have a query that queries a SQL Server database:
Select Agent, SUM([acd calls which have rung the agent])As CallsRung FROM Dashboard_stats Where Date = DATEADD(DAY,DATEDIFF(DAY,'20000101',GETDATE())-1,'20000101') Group by Agent
1. How can we find out what all are the SQL Queries/Procedures/Functions/<Oracle DB Objects> are running long time and affecting the Performance in each schema. If they affecting how to resolve it?
Here Need to Display the Queries and the method to increase the performance of the query.
2. How can we find out what all are the DB links are Out Facing and In facing? ( In Each Schema)
while using top command it shows multiple processes usage.Actually we have 3 databases in the same server.how to find out which database process and user session hogging the cpu resources
