SQL & PL/SQL :: Partition A Existing Table Based On Varchar2 Field?
Oct 13, 2011
I need to partition a existing table based on varchar2 field (which is actaully date value but storing as character in the table). Using below statement for creating table, but getting error.
create table TST_CUST_ARC
(
interact_id NUMBER(10),
extrn_id VARCHAR2(38),
src_cd VARCHAR2(25),
full_nm VARCHAR2(45),
run_control_date VARCHAR2(13)
[code]....
Getting error : ORA-00907: missing right parenthesis
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Jun 14, 2011
i want to create a new partition for version 2
existing table is as below
create table test
(
name varchar2(100),
version NUMBER(12)
)
[Code]....
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Nov 30, 2011
We have a transaction table and has 30 million rows. The table is not partitioned till date. We need to create partition on this table. We had an idea of moving this data to a temporary table and create partition[range]on the original table and move the data back.
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Aug 13, 2010
I need to create partition on the non partition table without dropping a table.
Range partition on stage tables and hash partition on fact tables.
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Jan 23, 2011
I recently started working with legacy code and noticed that some huge tables (5 years worth of data, don't have more details on me right now but can post later if needed) are partitioned based on time sequence number column while majority of queries are done based on time (different column). Queries performance is degrading and I'd like to try to modify partitioning and run some tests to evaluate performance improvement.
My only concern is with so much live data I have to come up with solution on how to switch partitioning with the least impact on applications running 24 x 7. Something you have done in the same situation and it worked?
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Sep 13, 2010
code to append data of 32k to exisitng CLOB field in an oracle table..
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Feb 12, 2013
i am trying to create Procedure which will create the partitions based on the other table date values one per each day.
CREATE OR REPLACE PROCEDURE PARTITION_TEST(PART_DATE_TABLE IN VARCHAR2, TABLE_NAME IN VARCHAR2,SCHEMA_NAME IN VARCHAR2)
AS
V_PART_NM VARCHAR2(20);
V_PART_CNT NUMBER;
V_DATE DATE;
V_SCHEMA_NAME VARCHAR(15);
[Code]..
It is not creating the partitions and even not giving any errors.
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Nov 27, 2012
I have partitioned the table based on field.But when I am selecting by Partition or by the field I am getting Explain plan as Table Access full.I am pasting the sql and Explain Plan here. The table has two partition by BOOKING_DT_WID. One less than 20100801 and other less than 99991231.
CODESELECT * FROM WC_BOOKING_SALESREP_F WHERE BOOKING_DT_WID >= 20100801;
SELECT * FROM WC_BOOKING_SALESREP_F PARTITION(SALESREP_LESS1_99991231);
Here is the Explain Plan for the same.
CODESELECT STATEMENT ALL_ROWSCost: 1,501 Bytes: 293,923,641 Cardinality: 809,707
4 PX COORDINATOR
[code]....
How do I know if the sql is doing partition prune.
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Mar 29, 2013
generate the number of rows based on table field.
Sample code is given below.
CREATE TABLE T
(
docno VARCHAR2(10),
CODE VARCHAR2(8),
QTY NUMBER(3)
)
LOGGING
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Mar 3, 2011
I have partition based table one the basis of year month. And we have 8 local indexes on this table. Every month we have to create a new partition and load data into this partition and the volume of the data is around 14million and the load process is taking long time due to indexes. Is it possible to drop the indexes from particular partition?
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May 15, 2011
i have two questions.
(1) how can i fill some value in a table column based on some existing column value automatically without user intervention. my actual problem is i have 'expiry date' column and 'status'. the 'status' column should get filled automatically based on the current system date. ex: if expiry date is '25-Apr-2011' and current date is '14-May-2011', then status should be filled as 'EXPIRED'
(2)hOw can i build 'select' query in a report (report 6i) so that it will show me list of items 'EXPIRED' or 'NOT EXPIRED' or both expired and not expired separately in a single report based on user choice. 'EXPIRED' & 'NOT EXPIRED' can be taken from the above question no. 1.
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Mar 23, 2010
sort data set A,B,1,2,A1,A2,B1,B2,2B,1000 as A,B,1,2,1000,A1,A2,B1,B2,2B.
I tried with LPAD and EXPREG_REPLACE funtion. But it did not work.
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Nov 10, 2010
I did a search on this topic and did see the ASK TOM response that storing all varchar2 fields as (2000) or what not is a bad idea based on an array fetch that developers may use etc. However I'm not sure that applies to my specific question, and the other examples he gave certainly didn't apply. So I'll pose the question a different way:
Question #1: Is there, for example, a performance difference between setting a field as varchar(2000) and varchar(25) if I was just running a native SQL query using a front end tool like TOAD?
Question #2: If I also need to index that field, will it take longer to index a varchar(2000) field than a varchar(25) field, assuming the same data is in both fields?
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May 3, 2013
I have a table where i need to update one field values based on another field of the same table , simply as it is.I have done this using one select all check box , on clicking that all check boxes of item_trans table will get selected , then i will un select some of check box and then using one button, i will update the value of the fields which are checked only.
I have put the sample code but when i am updating its taking long time and hanging.I am also attaching the form based on the test case provided.
--tables with insert statement
create table item_trans (trans_item varchar2(12),trans_qty number,trans_act_qty number)
insert into item_trans(TRANS_ITEM,TRANS_QTY,TRANS_ACT_QTY) VALUES ('TREE1',40,NULL);
insert into item_trans(TRANS_ITEM,TRANS_QTY,TRANS_ACT_QTY) VALUES ('TREE2',20,NULL);
insert into item_trans(TRANS_ITEM,TRANS_QTY,TRANS_ACT_QTY) VALUES ('TREE3',20,NULL);
--i want to set the value of trans_Act_qty as trans_qty
--i create one dummy or test block to keep the select all check box. for that table test script is
CREATE TABLE TEST
(
C VARCHAR2(2000 BYTE),
B NUMBER,
A NUMBER
);
insert into test (C,B,A) values ('A',1,1);
--code written in select all check box which is created on test.block.
BEGIN
GO_BLOCK('item_trans');
FIRST_RECORD;
LOOP
:M_END_YN := :M_END_ALL;
[code].......
--code written in M_END_YN ( actual check boxes where i will uncheck).
IF :M_END_YN = 'N' THEN
:M_END_ALL := 'N';
END IF;
--code written on button to update those values which are checked.
BEGIN
GO_BLOCK('item_trans');
FIRST_RECORD;
LOOP
IF :M_END_YN = 'Y' THEN
[code]......
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Jan 6, 2011
we have 2 databases with AR8MSWIN1256 characterset (arabic). our client machine has English windows installed. our .NET application, which runs on the client machine, using ODAC and it reads and writes from one db to another db. We have no problems with nvarchar fields containing arabic, but with varchar fields it seems that it reads the data just fine - we can see it in GUI.but when it writes the data to the second db, arabic becomes question marks. We tried to set client NLS_LANG in registry to AR8MSWIN1256 and to WE8MSWIN1252. It doesnt work.
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Jul 17, 2010
I have a partitioned table in which at the first level it is been partitioned based on date column(C1) and within in each partition it is again sub-partitioned based on a column(C1) which is a numeric value now at first level(C1 column level) there are 6 partitions and in the last partition i want to add another partition how can i do that.
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Feb 9, 2011
I need to create a materialized view with a clob column based on a varchar2 column of a table.This is because in the mv the clob column data gets appended one after another.
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Nov 6, 2012
I have been used to the consciousness that we should use the minimum length for varchar2 field that can store the data we need manipulate. But recently I was told that it has little impact on performance if we assign a much longer size.
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Jun 21, 2012
How can we partition a table based on date if it does not have a date column.
Actually I have to compare two tables on daily basis and fetch few rows from those two tables and enter it to a third table.But both these tables does not have a date column.
I am confused if i need to alter those tables and add date column or if there is some way in which i can compare the data from the two tables for that particular day only and not the whole table data.
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Aug 9, 2011
table was defined as below & indexes are also created on name /dept columns, data is also available :
create table test (
name varchar2(10),
version NUMBER(12),
dept varchar2(10)
[code].....
Now the requirement is that the parition keys has to be changed to 'dept' from the existing 'version' . How to accomplish this without any implication on the indexes and other constraints.
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Dec 14, 2012
We have a table which is already partitioned by list and now we would like to add a subpartition.
Create table Item_mst
(
ccn varchar2(10),
Flag varchar2(1),
Item varchar2(10),
status varchar2(1)
)
[Code]..
Now I could like to alter the above table for adding a new subpartition on each partition on status.
ALTER TABLE Item_mst
MODIFY PARTITION Item_mst_Test
ADD SUBPARTITION Item_mst_Test_A VALUES ('A');
Above alter gives ORA-14253: table is not partitioned by composite range method.
However dropping and recreating the table with subpartitions is working fine.
But Dropping and recreating the table in production is very cumbersome as it has huge data and many indices.
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Oct 9, 2013
I have a range date partition table month wise which i want to truncate the partition and load for each month data i get from source.
How can i get the partion name based on data value.
e.g
source data
SALES_IDSALES_DT
101/02/2008
101/03/2008
101/04/2008
101/05/2008
target table has same structure as source but has more data but i want to delete only those which is coming from source if it is there in target and then load. so i want to get partition name so that i can truncate and load them.
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Oct 17, 2011
Is there some functions to convert the long type field data to varchar2 type?
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Mar 25, 2011
I think that performance better partition table than non-partition table. How to assure partition table is better than non-partition table at SELECT operation?
I have compare a specific query EXPLAIN PLAN at partition table and non-partition table. both tables data is same. Is it true way or not?
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Jun 20, 2013
How to truncate the partition based on the given input. I've below table partitioned on dt field. How can i truncate the whole partition which contain the date 2013/04/30.
CREATE TABLE TST_SUMMARY
(
CUST_ID NUMBER(38) NOT NULL ,
[Code]....
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Mar 3, 2011
We have fact tables partitioned based on week.
We receive point of sale data on daily basis .
Some times we will receive data for previous week also.
In current system , we are analyzing only one partition(current partition).
Now , we want to analyze all old partitions also based on incoming old trading date.
how can i approach to find partitions for old data (trading_date s)
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Jun 26, 2010
I have a table that partitioned into six partitions. each partitions placed in different table space and every two table space placed it on a different hardisk
when I will do query select with the non-partition keys condition, how the search process ? whether the sequence (scan sequentially from partition 1 to partition 6) or partition in a hardisk is accessed at the same time with other partition in other hardisk. ( in the image, partition 1,4 accessed at the same time with partition 2,5 and 3,6)
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Apr 19, 2010
I want to display Week No as the heading.So, I have these:
define week_no=number
column week_col new_value week_no
select to_number(to_char(sysdate, 'ww')) week_col from dual;
I have tested it and it is working as the way I expected: select 'to display week no as column' "Week &week_no" from dual;
The output:
Week 16
----------------------------
to display week no as column ...So how do I display Week 15, Week 17 etc based on the calculation of &week_no e.g. &week_no+1?
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Oct 30, 2013
I'm using Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production and TNS for Linux: Version 11.2.0.3.0 - Production.Requirement is to create a script to add a LIST partition to some selected tables in a schema (tables do not have data, they are not partitioned). There are about 300 such tables (can vary) and their names are maintained in a separate table. Example -Existing table
-CREATE TABLE test_part(id number (2),
name varchar2(20),
audit_userid number (9));
Expected table
-CREATE TABLE test_part(id number (2), name varchar2(20), audit_userid number (9))
PARTITION BY LIST (audit_userid) (PARTITION p1_audit_userid VALUES (1));
Ultimate goal is to add more partitions based on the amount of data to be populated.
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Jun 19, 2012
Can i alter the table to create partition on non partition table, i have tried and could not create it. Do we have some other means to do it as this is the live table and cannot drop them else will lose the data.
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