the large data FOR UPDATE in table column ?
claimClob clob:=claim; -- claim large data
v_buf varchar2(1000);
amount binary_integer:=1000;
position binary_integer:=1;
[Code]....
why the FOR UPDATE don't do nothing ?
I need to add a new column to a very large table, and update it with 'N'. (this is similar as specifying default 'N'). I'm using Oracle 9i. Which is the best method regarding to speed, to update this column on entire table? The table contains ~30 millions of records. I've read that parallel DML (here UPDATE) does not work on unpartitioned tables. My table is not partitioned. If i specify:
update /*+ full(p) parallel(p,10) */ my_table p set p.my_column = 'N';
This, i think will not speed up the operation on 9i. Our business does not accept to use CREATE TABLE AS SELECT, then renaming table and recreating all indexes and so on.
I have a large table and want to calculate just a few values. Therefore, I don't want to create a new table, I want to update the table. Here an example:
I want to calculate the VALUE_LAG with ID = 4 only (-> two values).
create table zTEST
( PRODUCT number,
ID number,
VALUE number,
VALUE_L1 number );
[Code]..
I tried this, but obviously, windows functions are not allowed in the update statement.
update zTEST
set VALUE_L1 = lag(VALUE) over (partition by PRODUCT, order by ID)
where ID = 4
How can I do this?
I am considering all of the capabilities and benefits of using Data Pump for exporting and importing extremely large data files. Would like to know if importing to tape is possible? If so, would the data be accessible if needed later?
View 4 Replies View RelatedI have oracle 11gr2 database on linux os. It's total sga size is 500mb only. Now, if uses wants read the 1gb of data from database, then there is no sufficient memory in buffer cache. so how it will works. the transaction will get successful or it will fail.And i have another doubt, does oracle can read the data from memory only or it can also read directly from disk.
View 11 Replies View RelatedSince XML-files only contain character data, we could/should store it in a CLOB, rather than a BLOB.
But, One of my friend having a table where a column is defined as bloband came to know that XML data are being stored. I searched for some article with keyword 'How to insert large XML data in BLOB' But did not work.How to store the large xml content in a Blob and How to extract it?
I have encountered some problems in SQL I want to create a table with a bunch of prepared data. For ease of use, I choose to generate a SQL file which contains all the sql clauses used to create the table and insert the data. So all the data can only be inserted to a table using sql clause.
My questions:
1) If data of a column is large (for example, 1 M text), how to insert it using SQL, is there a piecewise method.
2) And how can I insert BLOB data using SQL clause.
What I what is to enclose all the operations in a single SQL file, and when the table is needed, just execute this SQL file.
I am facing a problem with utl_http.write_text in my pl/sql application. My requirement is to write data of size>32k. So I used a clob variable in write_text. But still it is showing numeric or value error when the data size is above 8k.
I have read that chunked transfer encoding will work. But I couldn't find out how this is done.
what could be effective data type to store large integer values like, 50,000; 10,000,000 etc.?
View 3 Replies View RelatedI have a query on , how to view the sample data from a very table which is large in size ( more than 10 million ).
I just need to see some sample data from a large table ( to see what kind of data which is application related ).
My question is :
Select *
from Sample_table
where rownum < 10
is this a Good way to view the sample data ?
I have understanidng that the rownum will be assigined to the rows once all the rows are reteived.
So what is the best way to view ?..I am not sure of any condition to put in the intial time of querying.
Scenario:
Our application is using a two instance, one for the live active data and the other for the reports data. We have a process which moves the data from the live instance to reports instance every night. In a single db environment the process is working without any issues. However when we move to the RAC environment the reports db's (insert) in large table get locked and we are unable to insert data to the reports db.
What we are performing is:
Insert into my_table_rpt select * from may_table_live@db_link_to_livedb;
Issues:
my_table_rpt get locked
We have found the workaround by disable locking in destination and subsequent to the insert enable locking
ALTER TABLE my_table_rpt DISABLE TABLE LOCK;
Insert the data to the reports database table
Then
ALTER TABLE my_table_rpt ENABLE TABLE LOCK
Question:
Why does the large destination table (my_table_rpt) get locked in the RAC environment?
We have data archive scripts, these scripts move data for a date range to a different table. so the script has two parts first copy data from original table to archive table; and second delete copied rows from the original table. The first part is executing very fast but the deletion is taking too long i.e. around 2-3 hours. The customer analysed the delete query and are saying the script is not using index and is going into full table scan. but the predicate itself is the primary key,More info below
CREATE TABLE "APP"."MON_TXNS" ( "ID_TXN" NUMBER(12,0) NOT NULL ENABLE, "BOL_IS_CANCELLED" VARCHAR2(1 BYTE) DEFAULT 'N' NOT NULL ENABLE, "ID_PAYER" NUMBER(12,0), "ID_PAYER_PI" NUMBER(12,0), "ID_PAYEE" NUMBER(12,0), "ID_PAYEE_PI" NUMBER(12,0), "ID_CURRENCY" CHAR(3 BYTE) NOT NULL ENABLE, "STR_TEXT" VARCHAR2(60 CHAR), "DAT_MERCHANT_TIMESTAMP" DATE, "STR_MERCHANT_ORDER_ID" VARCHAR2(30 BYTE), "DAT_EXPIRATION" DATE, "DAT_CREATION" DATE, "STR_USER_CREATION" VARCHAR2(30 CHAR), "DAT_LAST_UPDATE"
[Code]...
Data is first moved to table in schema3.OTW. and then we are deleting all the rows in otw from original table. below is the explain plan for delete
SQL> explain plan for 2 delete from schema1.mon_txns where id_txn in (select id_txn from schema3.OTW);
Explained. SQL> select * from table(dbms_xplan.display);
PLAN_TABLE_OUTPUT--------------------------------------------------------------------------------------------------------------------------------------------
Plan hash value: 2798378986
-------------------------------------------------------------------------------------
| Id | Operation | Name | Rows | Bytes | Cost (%CPU)| Time |
-------------------------------------------------------------------------------------| 0 | DELETE STATEMENT | | 2520 | 233K| 87 (2)| 00:00:02 || 1 | DELETE | MON_TXNS | | | | ||* 2 | HASH JOIN RIGHT SEMI | | 2520 | 233K| 87 (2)| 00:00:02 || 3 | INDEX FAST FULL SCAN| OTW_ID_TXN | 2520 | 15120 | 3 (0)| 00:00:01 || 4 | TABLE ACCESS FULL | MON_TXNS | 14260 | 1239K| 83 (0)| 00:00:02 |
-------------------------------------------------------------------------------------
PLAN_TABLE_OUTPUT
--------------------------------------------------------------------------------------------------------------------------------------------
Predicate Information (identified by operation id):
---------------------------------------------------
I have a report with single row having large number of columns . I have to use a scroll bar to see all the columns. Is it possible to design report in below format(half columns on one side of page, half on other side ofpage :
Column1DataColumn11DataColumn2DataColumn12DataColumn3DataColumn13DataColumn4DataColumn14DataColumn5DataColumn15DataColumn6DataColumn16DataColumn7DataColumn17DataColumn8DataColumn18DataColumn9DataColumn19DataColumn10DataColumn20Data I am using Apex 4.2.3 version on oracle 11g xe.
I have to cleanup data from our tables (Production Environment) that contain millions of rows. The question is apart from the solution of the partitioned tables what alternative recommended solution suggests Oracle?
To delete these tables by using a cursor PL/SQL block or to import all the database and in the tables that we want to remove the old rows to use the QUERY option of the data pump utility.
I have used both ways and i have to admit that datapump solution is much much faster than the deletion that suffers from I/O disk.The question again is which method from these two is more reliable and less risky for the health of the database.
I want to replace a word with another word in all tables data with varchar2 datatype that I have in my database .Is there a solution to update data at once instead of update all column data Separately.
View 8 Replies View Relatedtable1: url_data
page_url category
learn.web/AU/eng/AWARD/efg null
learn.web/CN/eng/AWARD/efg null
learn.web/US/eng/AWARD/efg null
learn.web/UK/eng/AWARD/efg null
learn.web/JP/eng/AWARD/efg null
learn.web/CA/eng/AWARD/efg null
[Code]..
table2: country
country_code
AU
CN
US
UK
JP
[Code]...
Now I have to update category by using /CC/eng/ where CC is the country code from country
I can use where page_url LIKE '%/__/eng/' but here the problem is the last row. I have to update by looking up from country table.
check my query and correct it basically I want to insert/update data from one user to other therefore I write this coding at my form button, when user press button first time its insert data successfully but if user press button again then it should update because data have been inserted in first step.
Actually it is detail table so it can have more then one record against any master. My query fails in updation, it inserts a new record instead of update.
find the attached file for checking QUERY.
I have a table named employee with 10 records. Empid is the primary key and empsal contains salary of the employees. I created backup of this table and name of backup table is empbackup.
Now empsal was updated to empsal*10 in employee table and 10 more records were also inserted in employee table. Now I want to restore the empsal column for 10 employees from empbackup(as initially there were only 10 employees in employee table when empbackup was created) table how can I do that in PL/SQL or Oracle?
SCOTT@orcl_11gR2> create or replace type nesttype as table of clob;
2 /
Type created.
SCOTT@orcl_11gR2> create table emp
2 (empnonumber,
3 enamevarchar2(1000),
4 hobbynesttype)
5 nested table hobby store as hobby_nt
6 /
Table created.
SCOTT@orcl_11gR2> insert into emp values
2 (1, 'name1', nesttype ('dancing', 'cricket','listening music','dancing'))
3 /
1 row created.
SCOTT@orcl_11gR2> insert into emp values
2 (2, 'name2', nesttype ('cooking', 'dancing','cooking'))
3 /
1 row created.
I want to update nested table record based on index suppose i want to update 3rd number of hobby for name2 employee
i have written the below query
SCOTT@orcl_11gR2>update Table(select hobby from emp
2 where empno= 2) e
3 set value(e)='new_value' where to_char(value(e)) = (select 4 to_char(tab1_element)
5 from (select rownum rn,
[Code]...
2 rows updated.
but the above query is updating 2 records but my requirement is it should update only third record
How can we update nested table based on index number
Constraint_type = UNIQUE
If I'm updating a value from 10000 to 555555. And the constraint's status is ENABLED Deferred is IMMEDIATE.
Now my question is at what stage the updating data will be checked?At the entry level or at end of the Updation statement?
I am trying to develop a form consisting of a key block and a single data block. The problem is that the driving table is not the table that needs to be updated.
user wants the following layout:student Advisor
ID# name degree major Concentration ID# name
The driving table (TABLE A) will supply the first 5 fields. The advisor ID comes from (TABLE B).
The user needs to update the adviser ID# field associated with the student ID# field. The form is to be tabular listing all students. I've seen some info on using procedures to insert, delete, update, query and lock tables, but i'm just not sure if that's what is needed.
when setting up data guard, if the primary clustered database is already in archive log mode, is there a need to restart both cluster instances when we update the spfile parameters for data guard ? or we can simply add the data guard parameters to the spfile while both cluster instances are online ?
View 4 Replies View Relatedi have a tabular form select * from emp and i want to create table and store there data in goup select empono,sal,com group by dept i want to insert in another table.
how i insert the data in table by forms front end and then update also when again click the button or any change occur in form insert into a select empono,sal,com group by dept
Is there a way in oracle 10g to know when was a row inserted or updated using oracle data dictionaries.
I know we can track these by creatig a seperate date column.
I just want to know if there is built in table which shows these.
We have to update a single column data in about 10 tables which has child/parent table relations, pk/fk constraints.. The column that we are updating is a part of primary key in half of the tables and part of foreign key in the other half tables.. I'm thinking of disabling all the foreign key constraints in the tables then update the column data then enable the foreign key constraints in these tables.
View 7 Replies View RelatedWe had two tables.
Table 1: matusetrans
ITEMNUM Location Quantity transdate
AM1324 AM1 2 12-4-12
AM1324 AM1 2 15-5-12
AM1324 AM1 3 10-6-12
AM1324 AM1 4 5-1-13
[Code]....
Table 2: Inventory
ITEMNUM STORELOC lastyear currentyear
AM1324 AM1 need sum(quantity) here need sum(quantity)
AM1324 AM2 need sum(quantity) here need sum(quantity)
We have to update the last year and current year columns with sum of quantities for each item from matusetrans table based on date at different location in Inventory table.
we had nearly 13,000 records(itemnum's with different location) in inventory table in DB we have to update entire records.
How to write an sql queries to update lastyear and currentyear columns with sum of quantities based on itemnum and location in Inventory table
Edit/Delete Message
optimize this code. Scenario have to update about 40 million rows to static value, I'm committing 1Million rows in one loop. The first 1 millions rows are getting updated very fast probably in a 2 minute, after that the code just hungs and i don't see increase in committed rows.
Declare
cursor c1 is
select rowid from t1
where c1 is not null;
[Code]....
I was trying to update the AGENTS table with the data based on queries. But all the records updates with the same data. I can't understand why.
Write a PL script to populate these columns as follows:
TRAVEL_STATUS is one of three values:
GLOBETROTTER: agent has visited five or more different locations in the course of his missions
ROVER: agent has visited between one and four locations
SLOB: agent has been on no missions.
CONTACTS is the number of targets that share the agent's home location.
some of the tables and columns are
agents table: agent_id, location_id
targets table: target_id, location_id
missions_agents table: agent_id, mission_id
missions_targets: target_id, mission_id
missions table: mission_id, location_id
My code is
DECLARE
status AGENTS.TRAVEL_STATUS%TYPE;
contact AGENTS.CONTACTS%TYPE;
CURSOR loc_cur
IS
SELECT
a.AGENT_ID id,
[code].....
I'm writing a Procedure which Updates or Inserts data in Multiple tables. Selected fields of 10 tables need to be updated or Inserted. For this I created a table which comprises of fields related to all 10 tables. Then I write Procedure. Under this I create a Cursor which uploads the data from the newly created table which contains different fields of 10 tables. Then I write Update and Insert statements one by one for all 10 tables.
Sample Procedure below.
-------------------------------------------
Create or replace procedure p_proc as
spidm spriden.spriden_pidm%type;
cursor mycur is select * from mytable;
begin
for rec in mycur
[code]......
----------
Note: I created table on my server because data is coming from different server. They will upload the data in the table from there I pick and update the tables. Is updating or Inserting data in different tables one by one is correct?
I'm using few cursors to update my data and store it back to the same table. But for some reason the cursor seems to be picking obsolete data.
cursor c1
is
select distinct roles
from table1
where flag = '1';
cursor c2
is
select distinct roles
from table1
where flag = '1';
begin
for i in c1
loop
here im updating the roles im picking to to a suffix and role.
update table1
set role = suffix_role
where 'some condition';
end loop;
commit; -- committing so changes are visible for my next cursor.
for j in c2
loop
here im deleting all the roles that are not part of my comparing table.
delete from table1
where role = 'something';
But in my debugging table i see that its deleting roles present as input for first cursor, whereas it should actually pick data with suffix_roles.
