SQL & PL/SQL :: Composite Index Having Varchar2 Number And CLOB Column
Feb 25, 2012
I need to create a composite unique index on varchar2, number and CLOB column. I haven't used such index before that have the CLOB column indexing. I found the below link related to CLOB indexing...
[URL]......
Links from where I can get related info. Also I would like to know the impact of such index on performance. I have to store and process around 50 million records in such a way, will it be beneficial to use this index?
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Jun 22, 2012
I have to change the datatype of a column from CLOB to varchar2, without changing the order of the columns. The table has no data.
I could find any other way other than dropping the CLOB columns and then adding new columns with varchar2 datatype. But this changes the order of the columns in the table.
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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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Jan 10, 2013
I have an index on column of table which of data type varchar2. While selecting data from that table I am using following scenarios in where on the indexed column
like '%abc%'
like 'abc%'
like '&abc'
Will be the corresponding index will be for those cases?
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Apr 21, 2010
I have table customer which contains a column CUSTOMER_FIRST_NAME
CUSTOMER_FIRST_NAME VARCHAR2(50)
What will be sql statement to add a constraint on the CUSTOMER_FIRST_NAME column of the CUSTOMERS table so that the value inserted in the column does not have numbers ?
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Jun 27, 2012
I am on 11.2.0.3 Enterprise Edition. We are using the new feature "Composite Domain Index" for a Domain index on a very large table (>250.000.000 rows). It really works with mixed queries. We added two number columns using FILTER BY.We have lots of DML on this table. Therefore, we are executing synchronize and optimize once the week. The synch behaves pretty normal. But "optimize_index" takes a very very long time to complete. I have switsched on 'logging' for the optimize process. The $I table takes some time but is finished normally. But the optimization of the $S table (that is the table created for the CDI feature) is running over 12 hours now - and far from being finished. From the logfile, I can see that it optimizes 1000 rows every 20 minutes. Here is the output of the logfile:
Oracle Text, 11.2.0.3.0
14:33:05 06/26/12 begin logging
14:33:05 06/26/12 event
14:33:05 06/26/12 process $N for optimize: SEQDEV.GEN_GES_DESCRIPTION_CTX_I
14:33:16 06/26/12
14:33:16 06/26/12
[code]....
I haven't found a recommendation from Oracle not to use "optimize_index" for Domain Indexes with CDI. But in my case, it would be much faster just to drop and recreate the Domain Index in question.
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Jul 23, 2013
is there some performance/access difference between a bitmap index on a number column and char(1) column? Both columns are not null with a default value.My application has a querie like this:
select ass.column20, ass.column30from table_a pucinner join table_b asson ass.column1 = puc.column1where pc.column_char = 'S'and ass.column_char02 = 'P'
If I create a bitmap index on column "column_char", the access plan is not changed. But changing the column datatype to number(1) and obviously the values, the index is accessed and the cost decreases.This table has 4.000.000 rows. Oracle 11.2.0.2SO
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Nov 8, 2012
I have a lot of queries on a table with WHERE clause:
WHERE CR_DATE > :y AND CR_VALUE = :x
Actually, there is an index on (CR_DATE) but much more selective index is on (CR_DATE, CR_VALUE). If I do not UPDATE any records on this table, is there any difference in INSERT operation (or another problem) when I replace actual index with multi-column index?
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Mar 23, 2010
in our application we are using clob column instead of varchar2 because varchar2 does not allow more that 4000 chars, so Using clob allows to put data of any length, will it cause performance issues ? we have this column in almost in all tables .
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Mar 28, 2008
How to convert a varchar2 column to CLOB when there is a thousands of records in it.
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May 12, 2010
I'm trying to insert CLOB to varchar2 from one DB to another using database link but failed.
INSERT INTO tmp_std_master@aapsbhx.iss.soton.ac.uk
(student_id, title, first_name, middle_name, surname, hus_id,
date_of_birth, email_address, prog_desc --- varchar2 (100)
)
SELECT DISTINCT c.ref1 student_id, c.title, c.firstname firstname,
[code]....
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Aug 21, 2006
I have to Insert data from one table to another table. First table contains some clob datatype columns and second table have carchar2 datatype.
Below are the structures of both tables;
SQL> DESC TBL_MAINSQL> DESC TBL_MAIN2
Name Type Name Type
----------------------------- ----------------------------------------- --------------
TXT_FEIN_NUMBER VARCHAR2(9) TXT_FEIN_NUMBER VARCHAR2(9)
TXT_QUOTE_NUMBER VARCHAR2(12)TXT_QUOTE_NUMBER VARCHAR2(12)
TXT_POLICY_NUMBER VARCHAR2(12)TXT_POLICY_NUMBER VARCHAR2(12)
TXT_AGENT_CODE VARCHAR2(10)TXT_AGENT_CODE VARCHAR2(10)
[code]....
The Table contains 5000 records. how to convert CLOB to VARCHAR2.
I used DBMS_LOB.SUBSTR but I received BUFFER TO SMALL ERROR.
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Oct 16, 2010
I ave a few fields in my flat file which might be a CLOB (not sure how the source is storing the data - need to check on that.) I am trying to load this data into my table column which is a varchar2(4000) . I am able to insert most of the data but few records are rejected because of Field too long error....
While debugging the problm I manually copied the field from flatfile and inserted into my table - bingo it worked. (The field was not more than 1000 bytes - only a few lines of information ) My question: When a field is not more than 1000 bytes why couldnt it get inserted as a varchar2?
Note : I cannot make the table column as CLOB because the problem is not with just one column - I have 10 fields which have this problem . So its not advisable to have 10 CLOB fields in the table......
I have specified OPTIONS (BINDSIZE=256000,READSIZE=256000,ROWS=1)
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Oct 24, 2007
i am fairly new in the oracle arena, but what would cause a statement such as
ALTER TABLE TEST_TABLE MODIFY text_field1 varchar2(100) DEFAULT 'testval' NULL
to change a column's type from VARCHAR2(100) to VARCHAR2(100 byte)? i found a few mentions of the 100 byte concept online but nothing that jumped out at me.
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May 12, 2011
I have created an non unique index lk_fein on lookup_fein( code,map_id,trash). When I check the explain plan it does a full table scan on lookup_fein. if I force it to use index by it does and the cost also decreases.
SQL> SELECT WORK_FEIN,
2 NON_FEIN ,
3 FI_FEIN ,
4 MFEIN ,
5 TOTAL_FEIN ,
[code]...
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Dec 14, 2012
if it is possible to assign a varchar2(14) index to a pl/sql table while fetching bulk data with bulk collect.my requirement is to assign varchar2(14) index to a pl/sql table so that i can directly reach to my record by index and process the record further.
further i need to run a loo on this ( for processing each record)my database version is 11.2.01.0.
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Jul 3, 2013
I have a table say MY_TAB with columns as below
emp_id number,
name varchar2(30),
from_dt date,
remarks varchar2(60)
insert into MY_TAB values (1,'TOM','01-JAN-13', 'some remark');
insert into MY_TAB values (1,'TOM','02-JAN-13', 'some remark');
insert into MY_TAB values (2,'TOM','01-JAN-13', 'some remark');
insert into MY_TAB values (3,'TOM','01-JAN-13', 'some remark');
insert into MY_TAB values (4,'TOM','01-JAN-13', 'some remark');
insert into MY_TAB values (4,'TOM','02-JAN-13', 'some remark');
How do I ensure that when a user tries to insert record with emp_id as 1, then he should only be allowed to enter another from_dt but the value in the name column have to be the same as in the previous row of emp_id 1.
insert into MY_TAB values (1,'TOOM','03-JAN-13') --shld not be allowed.
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May 14, 2011
I have 2 tables.The column in table A is number and Column in table B is a varchar2 datatype.I have to use the Column of table B as a filter to column of Table A.Below is the example.
create table A(Col1 number);
Inert into A values(1);
Inert into A values(2);
Inert into A values(3);
Inert into A values(4);
Create table B(Col1 Varchar2(100));
Insert into b value ('1,2,3');
Select * from A where col1 in (select col1 from b)
Error: Invalid Number
Is there a way to convert the varchar to number.The varchar field have multiple characters (numbers) seperated by commas.
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Jan 15, 2013
How to convert varchar2 to number data?
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Apr 3, 2013
I keep getting this error when I run my update statement. Here is what the coding looks like. I'm running Oracle 11g.
CREATE TABLE A (
SUPP_CD_EIM VARCHAR2 (20),
SUPP_CD VARCHAR2(20),
DSN_FAC_CD VARCHAR2(5));
[code]......
I want the output to look like
A1_1234
A2_2345
A3_3456
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Sep 18, 2009
When I try to convert numeric values � number(19) p.s 111111111111111111, the to_char function returns �1111111111111110000� because the to_char functions doesn�t support precision bigger than 15.
Is there any way to solve it?
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Oct 18, 2012
I have a question respect to remove spaces from a varchar2.
The varchar2 is '7987451 1234567' and i need that string like '7987451 1234567', because the field has a length of 15.
i try with this, but does nothing
Select TRIM('7987451 1234567') from dual
Other possibilities are find several spaces and try to replace with only one, but would a heavy work (may be with sentences Loop).
This problem is now in our loading processes. Exists some function to replace spaces between numbers of varchar2?
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Jun 18, 2011
I created table Contains then following columns
cheq varchar2(50)
date_due varchar2(50)
and data entry in this columns
cheq 500,1500,5000 all values numbers in this columns
date_due 1-1-2012 , 15-9-2010 all values in this columns date
i want sum the column "cheq"
when used this code but it's not working
select sum(to_number(cheq))
from table_name but the code not working
second column "date_due"
i want search between to date i used this code but also not working
select cloumn1,cloum2
from table_name
where to_char(date_due,'dd-mm-yyyy')
between to_char(date_due,'dd-mm-yyyy') and
(date_due,'dd-mm-yyyy')
but not work
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May 29, 2013
I am facing issue related to Number data while it is being converted to Varchar2, it is automatically getting rounded off after 32 decimal place.My database version is "Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production".
1) create table test18 ( col1 varchar2(10), val Number);
create table succeeded.
2) insert into test18 values ('First', -347026.6408499652467480885711448714129679); -- After decimal 34 digits
1 rows inserted
insert into test18 values ('Second', -347026.64084996524674808857114487141296); -- After decimal 32 digits
1 rows inserted
3) select * from test18;
COL1 VAL
---------- ----------------------
First -347026.6408499652467480885711448714129679
Second -347026.64084996524674808857114487141296
4) As per the requirement, all the columns would need to be concatenated as a single string along with comma delimiter
select col1 || ',' || val as record_string
from test18;
RECORD_STRING
---------------------------------------------------
First,-347026.64084996524674808857114487141297
Second,-347026.64084996524674808857114487141296
"First" string got rounded off to 97 (last 2 digits) instead of 9679 but for "Second" record it holds the actual value.Only thing which I could figure out while the number is getting type casted to String, it is getting rounded off to 32 decimal place.throw off some light on it and provide the solution how the original record can be kept intact without rounding off.
Expected Output_
RECORD_STRING
---------------------------------------------------
First,-347026.6408499652467480885711448714129679
Second,-347026.64084996524674808857114487141296
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Nov 15, 2013
Database Version : DB : Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit ProductionOS : HP-UX nduhi18 B.11.31 U ia64 1022072414 unlimited-user licenseAPP : SAP - ERP I have to RANGE partition on UPDATED_ON or PROFILE either one table which is having below
structure : Name Null? Type
-------------------- -------- --------------------------------
MANDT NOT NULL VARCHAR2(9) MR_ID NOT NULL VARCHAR2(60) PROFILE NOT NULL VARCHAR2(54) REGISTER_ID NOT NULL VARCHAR2(30) INTERVAL_DATE NOT NULL VARCHAR2(24) AGGR_CONSUMPTION NOT NULL NUMBER(21,6) MDM_VERS_NO NOT NULL VARCHAR2(9) MDP_UPDATE_DATE NOT NULL VARCHAR2(24) MDP_UPDATE_TIME NOT NULL VARCHAR2(18) NMI_CONFIG NOT NULL VARCHAR2(120) NMI_CONFIG_FLAG NOT NULL VARCHAR2(3) MDM_DATA_STRM_ID NOT NULL VARCHAR2(6) NSRD NOT NULL VARCHAR2
[Code]....
As per my knowledge, RANGE is better suited for DATE or NUMBER. and INTERVAL partition is possible on DATE or NUMBEr . Column PROFILEIts is of VARCHAR2 datatype. I know still I can partition as Oracle internally convert varchar2 to number while inserting data. But INTERVAL is not possible. How to RANGE partition on PROFILE ? Column CREATED_ON :It is of NUMBER with decimal
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Aug 16, 2011
i have a varchar2 column containing string values that can be converted to date i.e. ('31-JUL-11') and that column also contains text strings in it. i.e. ('Some string data...')
records whose column value can be converted to date are extractable via where clause (i.e. those rows are associated with some fix number / flag)
now when i try to use to_date function i get the error that
" ORA-01858 a non-numeric character was found where a numeric was expected "
in sql i have added a where clause to only pick rows with flag, but even then it gives the error.
using a subquery in the from clause eliminates the error, but when i create it in a view it again gives the same error.
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Jan 29, 2013
bookshelf_test table structure
title varchar2(100) y
publisher varchar2(20) y
categoryname varchar2(20) y
rating varchar2(2) y
my query is,
select ROWNUM AS "Rank",title,publisher from (select rating,title,publisher from bookshelf_test order by rating desc ) where ROWNUM <=3
returns result ,
1 1 MY LEDGER KOCH PRESS
2 2 TO KILL A MOCKINGBIRD HARPERCOLLINS
3 3 THE MISMEASURE OF MAN W.W. NORTON
But inner query (select rating,title,publisher from bookshelf_test order by rating desc ) returns,
1 5 WONDERFUL LIFE W.W.NORTON
2 5 THE MISMEASURE OF MAN W.W. NORTON
3 5 TO KILL A MOCKINGBIRD HARPERCOLLINS
4 5 MY LEDGER KOCH PRESS
5 4 TRUMAN SIMON SCHUSTER
6 4 GOSPEL PICADOR
7 4 HARRY POTTER AND THE GOBLET OF FIRE SCHOLASTIC
8 4 INNUMERACY VINTAGE BOOKS
9 4 JOHN ADAMS SIMON SCHUSTER
10 4 JOURNALS OF LEWIS AND CLARK MARINER
11 4 LETTERS AND PAPERS FROM PRISON SCRIBNER
12 4 PREACHING TO HEAD AND HEART ABINGDON PRESS
13 4 THE SHIPPING NEWS SIMON SCHUSTER
14 4 THE GOOD BOOK BARD
15 4 THE DISCOVERERS RANDOM HOUSE
16 3 THE COST OF DISCIPLESHIP TOUCHSTONE
17 3 SHOELESS JOE MARINER
18 3 KIERKEGAARD ANTHOLOGY PRINCETON UNIV PR
19 3 EMMA WHO SAVED MY LIFE ST MARTIN'S PRESS
20 3 EITHER/OR PENGUIN
21 3 CHARLOTTE'S WEB HARPERTROPHY
22 3 BOX SOCIALS MARINER
23 3 ANNE OF GREEN GABLES GRAMMERCY
24 3 WEST WITH THE NIGHT NORTH POINT PRESS
25 3 UNDER THE EYE OF THE CLOCK ARCADE PUB
26 3 TRUMPET OF THE SWAN HARPERCOLLINS
27 2 COMPLETE POEMS OF JOHN KEATS VIKING
28 1 POLAR EXPRESS HOUGHTON MIFFLIN
29 1 GOOD DOG, CARL LITTLE SIMON
30 1 MIDNIGHT MAGIC SCHOLASTIC
31 1 RUNAWAY BUNNY HARPERFESTIVAL
why final queries top 3 rows r different than inner query ?
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Jun 29, 2012
Is there a seeded function by which I can check all the rows which stored dates in varchar column.
I have a table say test (test_data varchar2(100));
Now I will insert all types of records into the table varchar,number dates and then i will write q query to etch all those records only which has dates only
INSERT INTO test(1);
INSERT INTO test('ABC');
INSERT INTO test(SYSDATE);
INSERT INTO test(TO_CHAR(SYSDATE,'DD-MON-YYYY'));
INSERT INTO test(TO_CHAR(SYSDATE,'DD-MON-YYYY HH24:MI:SS'));
INSERT INTO test('15/01/2012');
...
commit;
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Apr 26, 2013
I have table like-
CREATE TABLE C2X_TEST(NAME VARCHAR2(100),XML_CLOB CLOB,XML_XML XMLType);
here in XML_CLOB column xml files are stored.
Now i want to update XML_XML column with corresponding XML_CLOB value .
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Jul 3, 2012
i have another problem with clob column , when i try to insert data in it through the stored procedure then it shows an
error- 'ORA-01460: unimplemented or unreasonable conversion requested clob' and this error especially arise when data to e inserted in clob column , have more than 4000 characters.
sql>exec pi_test(1,'sysdate','text of clob column'); ORA-01460: unimplemented or unreasonable conversion requested clob
where is the error.
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