I have following records in table (T)
Idtype_cdNbrDt
1A1001/1/2013
2A101Null
3B100Null
4C100Null
5A100Null
Based on the type-cd, I need to create Unique index on Nbr & Dt columns
In above record set, I want to create Unique index on type_cd=A and not on B&C (Here i expect duplictes for a combination of Nbr & Dt)
Can we create Unique index on subset of record?
11.2.0.1...How do I create an index on a view or any workaround that my view won't get duplicates?
SQL> create unique index indx01 on db_backup_details_vw(id);
create unique index indx01 on db_backup_details_vw(id)
*
ERROR at line 1:
ORA-01702: a view is not appropriate here
Does Oracle supports an index that only contains a sub-set of the records in a table?
For eg - A table has 1 million records, can we have a index which contains suppose 100k records. We have used a similar logic in DMSII in Unisys. Not so sure if Oracle supports it.
We have been recommended to store data in CLOD data type.
Sample data: 1:2:2000000:20000:4455:000099:444:099999:....etc it will grow to a large number.
We want to create a Unique index, for functional reason. Is it advised to create a unique index on a CLOB datatype?
Using Oracle 11g, below is the table, partitions, unique and non-unique local index:
CREATE TABLE DOCA( DOCA_ID NUMBER NOT NULL , DOCA_BKG_PAX_ID NUMBER NULL , ROW_PURGE_DATE DATE NULL ,)PARTITION BY RANGE(ROW_PURGE_DATE)INTERVAL(NUMTOYMINTERVAL(1, 'MONTH'))( PARTITION P2007 VALUES LESS THAN (TO_DATE('01/01/2008', 'dd/mm/yyyy')), PARTITION P200801 VALUES LESS THAN (TO_DATE('01/02/2008', 'dd/mm/yyyy')),) TABLESPACE T0; ALTER TABLE DOCA ENABLE ROW MOVEMENT;
CREATE UNIQUE INDEX XPKDOCA ON DOCA( DOCA_ID ASC, ROW_PURGE_DATE ASC)LOCALREVERSE TABLESPACE I0; ALTER TABLE DOCA ADD CONSTRAINT XPKDOCA PRIMARY KEY (DOCA_ID); CREATE INDEX XFKDOCA_DOCA_BKG_PAX_ID ON DOCA( DOCA_BKG_PAX_ID ASC)LOCALREVERSETABLESPACE I0;
I would like to know the difference between the performance of the unique and non-unique local indexes?.
I have a running application where i have a table with pk defined on it and the pk clumn is inde in asc order by default. Can i alter the index in desc order as i always need to see the data in desc order.
View 7 Replies View RelatedI have created one unique index on one column of my table. Now i would like to add one more column in the same index without dropping the index.
SQL > CREATE TABLE DEBUG_TABLE
2 (
3 SLNO NUMBER,
4 MESSAGE VARCHAR2(4000 BYTE),
5 CREATED_DATE DATE DEFAULT SYSDATE,
6 CREATED_TIME TIMESTAMP(6) DEFAULT SYSDATE
7 );
Table created.
SQL > CREATE UNIQUE INDEX index_debug1 ON debug_table (SLNO);
Index created.
SQL > ALTER INDEX index_debug1 ADD COLUMN MESSAGE;
ALTER INDEX index_debug1 ADD COLUMN MESSAGE
*
ERROR at line 1:
ORA-02243: invalid ALTER INDEX or ALTER MATERIALIZED VIEW option
SQL >
I've got a table which has no unique identifier for a row. I have a field for an ID value but somhow there are duplicate values in this field.
Now I want to create an unique index over this field but therefore I have to remove the duplicate values.
So what I need is an update statement, maybe in a for each loop, which updates the ID field in each row starting with 1 and increasing the value.
In Informix there is a rowid value which is automatically set by Informix. But I think there´s no correspondent function/value in Oracle....
I have a table which sees a lot of use for queries
CREATE TABLE CASE_STAGE
(
ID NUMBER(9) NOT NULL,
STAGE_ID NUMBER(9) NOT NULL,
CASE_PHASE_ID NUMBER(9) NOT NULL,
"CURRENT" NUMBER(1) NOT NULL,
--and other columns
)
ID is a primary key
CASE_PHASE_ID is a foreign key
"CURRENT" should only ever have values of 0 or 1. When it has a value of 1 it is unique for that CASE_PHASE_ID
What I have tried that doesn't work is
create unique index case_stage_F_IDX1 on case_stage("CURRENT", case_Phase_id) which gives me
ORA-01452: cannot CREATE UNIQUE INDEX; duplicate keys found
What is the correct syntax, something like ("CURRENT"=1,case_phase_id) seems right but fails with an error about a missing bracket. Do I need to use a CASE statement here?
I have a table with a non-unique index consisting of three columns. The first column is not null while the remaining two are nullable. Queries using this index will chiefly be made in two ways.
1. Column one and two having values. Column three is null.
2. Column one and thre having values. Column two is null.
In both cases I expect range scan will be used since it's non-unique. In the first case the scan will be on values in column one and two. But what happens in case two. Will the range be on colum one, column two(being null) and cxolumn three? Or will it be on just column one since the second column is null? I have done some testing. I can see , using EXPLAN PLAN, that range scan is used in both cases. how the index is used?
Is there any other drawbacks with an index like this?
I'm having problem with my database, which contains more than 1 rows with a same value on a field that has uniqueness contraint.
Here is the log from sqlplus. When I select on RI field, it shows 2 rows. But when I select on SCNUM field, it shows only 1 row. This SCNUM has an unique index on it.
And it is still in VALID state
SQL> set autotrace on
SQL> select ri, scnum from scratch1_p where ri in (536964983, 536955574);
select ri from scratch1_p where scnum='444393975';
RI SCNUM
---------- ----------
536955574 444393975
[code].....
Is there any hint to force "Index Unique Scan" over "Index Range Scan".
My query is generating different plans with the above two, and very slow when it uses "Index Range Scan".
What should be the order of columns while creating b-tree non-unique index.
Low cardinality first
or
Hight cardinality first
I am getting a following odd result where the same a Job could be linked to multiple enquiries. What I want it to show is just one job if its linked to multiple enquiries. I show you some sample result:I wrote the following SQL for it:
SELECT
'Enquiry' as Origin,
job.job_number,
enquiry.enquiry_number as Defect_or_Enquiry,
job.site_code,
central_site.site_name,
job.priority_code,
priority.priority_name,
job.target_comp_date,
'Target Completion Date required' as Due_Date
[code]....
Is there anything you would add so that it shows just a unique job number where the job has multiple enquiries linked to it? I tried putting SELECT DISTINCT but that did not work.
We are getting an error as below when trying to load data into a table.
INSERT /*+ APPEND parallel(IA_SBSCR_DED_MAX,4) */ INTO EDW.IA_SBSCR_DED_MAX
*
ERROR at line 1:
ORA-12801: error signaled in parallel query server P000
ORA-26026: unique index EDW.XPKIA_SBSCR_DED_MAX_A initially in unusable state
The index has been rebuilt but we still have this issue.
I have a table
TAB1 with data
no name
1 abc
2 abc
3 xyz
4 xyz
5 cvb
now I would like to create a form with name counts as
abc 2
xyz 2
cvb 1
I would like to create a datablock to display all the unique names, not sure where I should be writing the query to display unique names. I would like to create a textitem box to display the counts when the form is compiled, but not sure which trigger to use to write the query.
Can we create non-cluster index on a clustered index?
View 5 Replies View RelatedI have a multi-record block with several text items.
On one of the text items i want to enter a value and then check whether the same value for the item has already been entered on any other records within the block.
If it has already been entered then i want to display a message and null out the field.
I have tried using app_record.for_All_records from a when-validat-item trigger but this does not work as you get a 'FRM-40737 Illegal restricted procedure go_block in when-validate-item trigger ' error
I have the search screen in my form so after searching if i select the row by using the button it will navigate the first tab page that is "gas" screen here if i tried to change the value like update and save the form it is not allowing me to update the value raising the error message "oracle unable to insert the record". if i see the "display error" in menu it is having the select statement with error "unique key violation error ora-00001".
In save button containe "commit_form"
A Master form in a tabular format. Id is a display item. I want to auto generate Id with following query.
select nvl(max(issue_id),0)+1 into :issue_mt.issue_id from issue_mt;
It works:
1)When each record is saved before creating new record.
It doesn't work:
2)If multiple records are entered with out saving each record.
What to do to generate unique Id in both cases?
i want to insert unique number with out gaps in a col of a table every time my query runs . it shouel generate numbers from 1 to n. I can do it using sequence , but sequence need reseting and other user can reset it also and it creats gaps too.
Any function/technique which can give me session or transaction specific unique number on each call to sp.
i want to inserting these numbers in a table and insertion is going on in a loop.
I have a fairly standard Purchase Order form which contains pre-loaded data (been uploaded from an XML file).When the Purchase Order is processed, the form updates a Price History table only if the Price on the PO_Details changes.The code for updating the price history table is contained in a PRE_UPDATE trigger on the PO_Details Data Block.
No other data changes on the PO_Details table.I now want to change this so that the Price History table is updated even if the price does not change i.e I want to create a history record for each record on the PO_Details irrespective of whether it was updated or not.
Is there an alternative trigger that I can move my code to (ie move it from PRE_UPDATE) to some other trigger that is fired for each PO_Details record even if there is no change.
I have the following case to solve:
Example Table:
Nr_ordPos1Pos2Itemqty
O4018510000107 170,00
O4018520000107 30,00
O40651010000107 500,00
O40651020000107 50,00
O4114510000107 300,00
O31141010000107 50,00
O3114520000107 50,00
I need to create a query that returns record by record a field qty_progr with the cumulate qty considering previous records. The result should be the following:
Nr_ordPos1Pos2Itemqty qty_progr
O4018510000107 170,00 170,00
O4018520000107 30,00 200,00
O40651010000107 500,00 700,00
O40651020000107 50,00 750,00
O4114510000107 300,00 1050,00
O31141010000107 50,00 1100,00
O3114520000107 50,00 1150,00
I have a table that has three columns.
UserId - DateStamp - Action
An action contains user activities such as "logon". A user may logon multiple times in a day.I'm trying to create a query that displays the number of unique logons for each user per day.
By doing the following:
select userid, to_char(creationtimestamp,'YYYY-MM-DD'), count(*)
from useraction
where action = 'logon'
group by to_char(creationtimestamp,'YYYY-MM-DD'), userid
order by to_char(creationtimestamp,'YYYY-MM-DD') desc;
I can get the following results
userid - date - count
1 - 2/21/2010 - 8
1 - 2/22/2010 - 3
2 - 2/22/2010 - 2
1 - 2/23/2010 - 1
4 - 2/23/2010 - 6
6 - 2/23/2010 - 1
What I'm trying to get is
2/21/2010 - 1
2/22/2010 - 2
2/22/2010 - 3
i'm create table
CREATE TABLE EQU_PARAM_MONITORINGX
(
SERIAL_NO VARCHAR2(32 BYTE) NOT NULL,
[Code]....
why accessing record not using index, but using full table scan?
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
How to retrieve first hundred records from a table ?
FYI
---
The table size is 5 GB
The table count is 127922653
Table has 14 columns
Table is partitioned as well.
The table has 10 partitions.
I am exporting using query parameter. I am trying to export subset of table using rowid.
SQL> select rowid , name from tab1;
ROWID NAME
------------------ ---------------
AAAM0rAAEAAAAGMAAA sam
AAAM0rAAEAAAAGMAAB sona
AAAM0rAAEAAAAGMAAC rose
AAAM0rAAEAAAAGMAAD chris
AAAM0rAAEAAAAGMAAE san
.................. ....
.................. ....
command given as
exp sam/sam tables=tab1 file=exprwid.dmp query="where ROWID='AAAM0rAAEAAAAGMAAA'" log=log1.log
Export done in US7ASCII character set and AL16UTF16 NCHAR character set
server uses WE8ISO8859P1 character set (possible charset conversion)
About to export specified tables via Conventional Path ...
. . exporting table TAB1
EXP-00056: ORACLE error 911 encountered
ORA-00911: invalid character
Export terminated successfully with warnings.
how can i export this record ?
i want to create a bitmap index,but getting the error shown below..i created primary key on column dname of dept and unique constraint on empno of emp.
SQL> create bitmap index bindx on dept d(d.dname) from emp e,dept d where e.deptno=d.deptno;
create bitmap index bindx on dept d(d.dname) from emp e,dept d where e.deptno=d.deptno
*
ERROR at line 1:
ORA-25954: missing primary key or unique constraint on dimension
How to create index on materialized view which is refreshed daily basis.
View 3 Replies View Related