Best Tool / Method - Move Data In Real Time?
Sep 22, 2010
We have oracle 9i database named A with 2 schema A1 and A2.User enters data at A1 schema and the incremental data moved to A2 schema after some verfications performed by some scheduled job on A1 schema.
we want to move this incremental data to B1 schema of another oracle 9i database B at the real time when data gets entered to A2 schema of A oracle 9i database. We have access to A2 schema of A database and B1 schema of B database.way to do it or best practice to do this activity or if there is any third party tool or any available oracle utility to perform it?
Note: A2 schema of A database and B1 schema of B database has one to one mapping.We want to avoid using trigger on A2 schema, how data gets populated from A1 to A2 schema .
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Sep 13, 2013
we have a requirement for migrating data real time from source db to target db as well as to a queue.
achieve this using any custom technique?
we tried exploring Streams with CDC but Streams being depricated and CDC removed in Oracle 12 c, we are kind of stuck.
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Dec 11, 2012
With 11gr2, by default, on STARTUP, the standby database is open
-> in READ ONLY mode
-> with Intended State: APPLY-ON
so the ACTIVE DATAGUARD option is in use ....
is there a way to deactivate REAL TIME QUERY permanently, so whether on STARTUP or STARTUP MOUNT, the standby stay only mounted with Intended State: APPLY-ON
The only way i found is to do the following :
SQL> startup
DGMGRL> edit database 'PHNXENT' set state='APPLY-OFF';
then
SQL> startup mount
DGMGRL> edit database 'PHNXENT' set state='APPLY-ON';
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Jan 22, 2012
We are planning to move BLOB images in our DB to BFILE to reduce the time and size of backup.
So when we have a physical dataguard setup, can we configure data guard to copy the OS level BFILE's to the DR site?
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Mar 30, 2011
i want to hide browsers menu bar and tool bar at form run time and i want to show only form menu in the browser
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Nov 16, 2012
What is the need of Temp table in Oracle ? what is the advantage of Temp table over normal table ? Is temp table a log operation one. What is the scenario of using temp table in real time ?
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Dec 9, 2010
I want to know about ANSI JOIN in Oracle 9i and how to use this ANSI JOINS and where we have to implement this ANSI JOIN in real time.
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Jul 24, 2012
Regular Expression in oracle??Especially the use of this in real time scenario.
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Nov 15, 2012
Oracle 11.2.0.3.0
I have a primary database orcl and logical standby database orcl_std.
Real time apply is enabled. I have standby redologs in both primary and standby sides and I`ve started recovery with below command:
ALTER DATABASE START LOGICAL STANDBY APPLY IMMEDIATE;
When I create a new table in primary database, I am unable to see it on standby database (Although real time apply is enabled) However, when I switch log in primary, I can see the new table in standby database.
My question is, why realtime apply is not working in my scenerio ? I was expecting to see the new table immediately in standby database once it is created in primary database. Why am I supposed to wait for log switch in real time apply ?
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May 16, 2013
When we use this kind of code in PL/SQL block.
CREATE OR REPLACE TYPE sample_object IS OBJECT
(id NUMBER
,name VARCHAR2(30));
/
CREATE OR REPLACE TYPE sample_table IS TABLE OF sample_object;
I have read some docs ,but I didn't get any information where exactly we use this.provide one real time scenario with an example.How this is different from record.
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Sep 4, 2012
Can we change the condition of an item from always to none on the real time ? How ?
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Jul 25, 2011
If it possible to display Tool Tip of a Column Require to Display the Data contain in that Column.
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Feb 4, 2011
I've got a query running a select count (*) over a table. The default plan takes in the order of 15 minutes to return, a hinted plan to use a different index takes 3 minutes to return.
Unfortunately I cant get at the index stats and a few other areas which I suspect may be key here.When running autotrace against the two queries I see fairly different values as one would expect.
Query
select count (*) from fulfilmentitem bfi where created >= sysdate-30 AND bfi.status = 'FA' AND bfi.fulfilmentmethod = 'D'
Slow run
PLAN_TABLE_OUTPUT
-----------------------------------------------------------------------------------------------
----------------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)|
----------------------------------------------------------------------------------------------
| 0 | SELECT STATEMENT | | 1 | 15 | 33119 (1)|
| 1 | SORT AGGREGATE | | 1 | 15 | |
|* 2 | TABLE ACCESS BY INDEX ROWID| FULFILMENTITEM | 12525 | 183K| 33119 (1)|
|* 3 | INDEX RANGE SCAN | IDX_FULFIL_METHODSTATUS | 250K| | 1786 (1)|
----------------------------------------------------------------------------------------------
[code]....
IDX_FULFIL_METHODSTATUS is across FULFILMENTMETHOD & STATUS in that order.
IDX_BFI_CREATED is on CREATED and is approx 70% of the size of the other index
The row counts estimated in the explain plan are out, the count(*) comes in at 32.8k rows.As you will have seen, the fast run shows a pretty significant consistent get increase compared to the slow run and a decent though not dramatic physical read drop.
My uncertainty is around if these changes in consistent get/phys read values would typically be enough to suggest the real time improvements I'm observing or if other (albeit perhaps temporary) factors are involved. It is a prod OLTP environment so the data will be rapidly changing and that may be a factor.
I know it can never be an exact science without intimately knowing the hardware/current loads etc but I also know that there's enough experience on these boards to have a loose handle on if the time shifts between queries are likely (or not) to be reflective of the stat changes or if those differences alone shouldn't (or typically wouldn't account) for it.
I'm thinking about instructing the query to ignore its original plan but am hesitant to do so without being a little more confident that it's not just a timing thing or something other than the change of index approach which may be causing the improvement. the autotrace stat changes observed I couldn't put my hand on heart say "yup - that change is good, ignore the default index all the time for this job".
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Oct 17, 2011
Our application has been installed at customers in North America, Europe and South America for several years, in some cases, over 10 years. At least one of our customers has hundreds of gigabytes of data. We are considering options for cleaning out the old data.
The database runs on a variety of systems (Linux, Windows, Unix) and in several version (Oracle 9, 10, and 11). We need a solution that works in all environments.
Two of our main criteria for a successful solution are that:
-It maintains application data referential integrity. Our application makes little use of foreign key constraints, so the cleanup process will apply critical business rules to candidate data to determine if it can be deleted or not.
-The operation of the cleanup program does not impact use of the system in production.
For various reasons (license cost, installation issues) the partitioning option is not available to us.
Alternative 1: Flag records for cleanup
This requires adding a 1-character column to each table. That is a one-time operation done during implementation. The procedure applies the business rules and sets the flag according to whether a row is to be deleted or not. Rows marked for deletion can be checked, reset, exported, etc. Finally, a separate process deletes all marked rows.
Advantage of this is that the deletion process will use a full table scan to find the marked records. There is no index navigation, so hopefully less overhead. Disadvantage is that its updating application data which might affect user's perceived system response. There is some undefined concern that locking or other table activity involved with updating the flags could impact users.
Alternative 2: Build a list of keys for data to be deleted
We will build a list table during implementation. The first process examines the application data, applies the deletion rules and writes key information to the list for data that can be deleted. The list can be checked, reset, rebuilt and listed rows can be exported as required. Finally, the cleanup process uses the list to find and delete the data.
Advantage is that it doesn't update the application data as its building the list. Disadvantages are that it that there is some overhead in building and checking the list. The list requires more space than the flags in alternative 1 but we can handle that in various ways. The procedure needs to navigate key structures during the delete step as well as in the list-building phase.
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Oct 1, 2012
We have this archicture:
OLPT DB --> OLPT DB (Physical Standby, active dataguard) --> Data warehouse DB
We only allowed to connect to OLPT DB (Physical Standby, active dataguard) from Data warehouse DB. If there is possibility to use some of Oracle "native" method of data extraction (replication) from OLPT DB (Physical Standby, active dataguard) to Data warehouse DB.
As far as I know we cannot create materialized view log in OLPT DB (Physical Standby, active dataguard) in order to do data replication, but maybe there is some others ways?
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Aug 19, 2010
I have to move data from old tables into new tables. I use a sqlplus script and execute multiple 'insert from select'. I thought the SQL statements are executed in sequence, one after the other. I run into this problem: Let's take this script for an example
insert into A (a,b,c,....
select a,b,c......
from X;
insert into B (a,b,....
select a,b,....
from A joined with Y;
commit;
After executing the script in our development DB
select count (*) from A
returns 200
When the script is executed in production, A table record count is 5
select count (*) from A joined with Y; (used in the second insert)
returns 200.
It seems that the two statements are executed at the same time and table A is not fully populated when the select in statement two is executed.I suspect this is due to parallel execution in production.
Will executing
ALTER SESSION DISABLE PARALLEL DML;
ALTER SESSION DISABLE PARALLEL QUERY ;
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Mar 16, 2011
Is it Possible to Maintain real Time Backup using RMAN ?
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Mar 13, 2012
The requirement details are as below,
1) The database contains static as well as transactional data for telecom domain.
2) We have to move region-wise data from one database to another.
3) There are around 10 regions.
4) The region wise data extraction from source db is based on around 40 to 50 tables. Rest of the tables contains static data & it will not change.
5) The volume is around 1 million subscribers per region.
6) The migration is required because
a) The client is upgrading its base product which uses this database
b) There is a change in structure of static tables
c) Hardware upgrade
d) The client want to start with single region on new database & rest of the regions will be operated from old database.
7) Keep execution time to very minimum.
I am thinking to have solution as below,
1) Create destination database with upgraded db structure (as mentioned in 6b)
2) Create database links to access source db in destination db.
3) Write SQL queries to fetch data from all the respective tables for a specific region
4) Write separate PL/SQL blocks for each table to fetch data from source db & insert into respective table in destination db
a) Use FOR ALL & bulk collect to improve the performance
b) Divide table data into multiple chunks & execute parallel batches (around 10) to insert the data
5) Validate pre & post counts to verify the success of migration
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Oct 30, 2012
I have database A and B , we are strictly restricted to not to create any DB links between these database. In database A based on complex logic we in a stored procedure we populate the data to table type..now dot net will take this table type data and insert the same in database B.
Question here :
1.When we try to bulk collect all the data into table type , i am getting error operand exceeds limit, but it is mandate to put all data in one short to table type as dot net will take that and insert into B database.
2.Is there any good logical method to achieve this in a simple way.
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Jul 22, 2010
I want to move data from one partition to another partition in a same table.
Ex: Table A has Partitions P1 and P2. I want to move data from P1 to P2.
Is this is possible?
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Jul 3, 2012
I have two tables with almost the same columns. Table A has 50 columns, Table B has 51 columns, which are defined exactly the same except one more column as LOAD_TIME.
Is there any easy way for me to move the data from Table A to B? the Extra column LOAD_TIME will be set as current system time. All I want is to avoid list all 50 column names. The following SQL has error ORA-00923 error.
INSERT INTO TB_B
SELECT *, sysdate from TB_A;
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Jan 4, 2013
I have a range partitioned table with one lob column. Each partion is on a separate tablespace except two partitions which are on same tablespace. Now I want to move a partition from one tablespace to another tablespace along with lob data. By using a simple alter table move partition will also move the lob data or there is some special procedure to adopt.
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May 4, 2011
i made a master-deatil data block and when i completed all field on master-data block i can`t move to data block detail.
when i press (TAB OR ENTER) on last field, the cursor go back to first field.
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Feb 7, 2013
I am trying to move data from one schema in database A to another schema in database B and only move data not others (procedure, view, function). What is the best way to do it? I am thinking database link then insert into select from database link. Is there a better way?
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Aug 23, 2012
I want to move all data from my users tablespace to anohter new tablespace i have created name test1
so how can i do this using expdp
i want to move all objects from this my users tablespace to this new tablespace
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Mar 28, 2013
I have to move the data from a Varray column to a table.
Lets say I have created a Varray as described below,
create or replace TYPE "BT_TYPE" AS OBJECT (
R_ID NUMBER,
P_EVENT VARCHAR2(100))
/
create or replace TYPE "BT_VR" AS varray(20) of BT_TYPE
/
And I have a used this Varray as the column datatype in table
Create table BT_MASTER(
BT_ID_SEQNUMBER(5),
BT_DETAILBT_VR);
And this table contains data.
I want to move the data in the VARRAY column BT_DETAIL to another table. I have create a staging table BT_STG which contains a surrogate key column and the columns from the VARRAY. I am creating this staging table at run time.
Create Table BT_STG(
BT_STG_ID NUMBER(5),
R_ID NUMBER(5),
P_EVENT VARCHAR2(100)
);
One way to create this staging table is to query the data dictionary views to get the VARRAY object's columns, datatyeps and create it.
Is there any other simpler way by which I could create a table similar to a VARRAY/Object?
Something similar to,
create table test as select * from BT_VR
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Apr 12, 2011
We are migrating database from HP to AIX. Data is all on SAN.I can do it through RMAN convert. What I want to know is if it is possible to move data at storage level without using Convert command?
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Dec 1, 2011
I am using SQL developer 2.1 to migrate tables from Sybase 12 database to oracle 11g. I have used online data move option for moving sybase data into oracle tables, but even after data move is completed not all rows have been moved from sybase tables to corresponding oracle tables. Some rows are missing but still there is no error message being displayed, how to find out what's going wrong.
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May 18, 2011
I need to move my indexes (around 300) from data tablespace to index tablespace. What's the best way to do it?
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Jan 4, 2013
I need to implement data guard on 2 node rac set setup in 10g.
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