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 .
View 2 RepliesHow to convert a varchar2 column to CLOB when there is a thousands of records in it.
View 15 Replies View RelatedI'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]....
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.
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)
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.
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?
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.
View 2 Replies View Relatedi 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.
I have a column named "col1" with datatype "varchar2(10)" and row wise entries like "1,1A, 2,3...,10,2A,..." like. I want to order it like "1, 1A ,2,2A, 2B,3... 10...".I tried it with to_number() but it gives me
1,10,11,2,....like that.
What is the best alternative to using VARCHAR2 if the output gets truncated after 4000 bytes in a PL/SQL function?
View 10 Replies View Relatedcreate table members(
memberID varchar2(7),
locationID number(5),
roomID varchar2(5)
)
/
[Code]....
MEMBERI LOCATIONID ROOMI
------- ---------- -----
2007209 1 1
2006253 1 1-A
2006253 1 1-A
2006265 1 1-B
2006240 1 1-C
2005064 1 1-D
2007836 1 100
2007211 1 101
2007075 1 102
2007110 1 105
[Code]...
Function created.
SQL> select * from members
2 order by safe_to_number(roomID);
MEMBERI LOCATIONID ROOMI
------- ---------- -----
2007209 1 1
2007185 1 2
2007089 1 3
2007023 1 4
[Code]....
How can I sort the output to get the result like below
2007209 1 1
2006253 1 1-A
2006253 1 1-A
[Code]...
and so on...
Once a year in the application we have a specific query that gets used a lot. It's an UPDATE that updates a single record in a single table with a few different datatypes, but the issue is happening with one of the VARCHAR2 fields. It updates one VARCHAR2(2000) and three VARCHAR2(4000) fields at the same time.
This year, 9 of the 95 times it was used resulted in one of the VARCHAR2(4000) fields as null in the database. The users would not want this field to be null and 5 of the 9 have told us they entered something (the form they're filling out is a research proposal and leaving this field empty would be pointless because it's part of the funding request, so they're not doing it). The application isn't doing it because it's not consistent. I've checked the application and these fields can't be nulled any other way.
We just found the issue so I looked back over the past years back to 2005. Last year it didn't happen at all. In 2010 it happened a handful of times. Some years there were even more times. It's not always the same field but it's always a VARCHAR2 of at least 2000 characters.
I have a lot more information but it's all just details (let me know if you need to know more). I'm wondering if there is a bug in 10g with these types of fields. I don't believe it's malicious behavior on an individual's part but I suppose that's always possible.
how to research something like this. I tried to get access to Oracle Support and the Knowledge Base I heard they have but it doesn't look like I can do that
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.
How to convert varchar2 to number data?
View 8 Replies View RelatedWhat is the exact difference between varchar and varchar2?
As i know only the length is the one difference.Apart from this length,what are all the differences?
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
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.
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?
column name: extra_hour
datatype: varchar2(5)
extra_hour
----------
01:30
01:30
00:00
02:45
and so on...
Problem: I want to add up all the given value and display it in a select statment, that is the output should be:
Output:
XXXXXX
----------
05:45
I have table called INFO and the column called CREATED_DATE . Now the datatype of CREATED_DATE is of varchar2 . Now If I need to query the table through select statement where I need to order the result based on CREATED_DATE , how can i achieve this ?
View 1 Replies View RelatedI have a stored proc which takes IN parameter of datatype varchar2.When I am trying to run the proc it is throwing error that "input buffer too small".The datatype assigned to IN parameter is of varchar2(200) but actually the length of the parameter passed is around 500 characters.the way to increase the length of Input parameter to 500 characters??
View 16 Replies View RelatedI 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?
which is the better option to use when the quote needs to be concatenated to a varchar2 value i.e.
In order to insert 'test' into a column exactly as yet see I used:
chr(39)||'test'||chr(39)
However, the DBA (OCP) says that is not a good way to do it and should be changed to:
''''||'test'||''''
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
I have written a trigger & procedure to call a webservice from pl/sql procedure. Everything was working fine until I was told to use nchar & nvarchar2 instead of varchar2 as per requirement. Now I am not able to run the procedure and getting errorcode with return response from server.
I didn't changed the width of columns but only datatype. What precautions do I need to take in code while doing this and what could have caused the error only by converting the data type.
With a very large database (VLDB) for a data warehouse (DW) using primarily a STAR based schema in an environment in which time (both human and CPU) is orders of magnitude more valuable than storage capacity, is there any signficant difference in query performance when tables have all fixed length (CHAR) columns compared to tables with variable length (VARCHAR2) columns?
I realize this is one of those "in general" questions so considering "a given VLDB DW environment" with all other things being equal, what, if any, is the time based performance difference between a database of tables with all fixed sized columns versus one of tables with variable length columns ?
CREATE TABLE CHECK(
ADM_DATE VARCHAR2(10)
)
INSERT ALL
INTO CHECK VALUES ('122012')
INTO CHECK VALUES ('112012')
INTO CHECK VALUES ('102012')
INTO CHECK VALUES ('092012')
INTO CHECK VALUES ('082012')
SELECT * FROM DUAL;
ADM_DATE has the data as in format 'MMYYYY' but I've to make it as 'YYYYMM' while the datatype of ADM_DATE is VARCHAR2.
How can I do it?
I have problem to convert simply varchar to date data type.
For example: 2012-05-28 22:36:08 and I would like to get format 28.5.2012 22:36:08
However I try to do it I get always some errors.
select '2012-05-28 22:36:08',
to_date( '2012-05-28 22:36:08', 'dd.mm.yyyy HH24:MI:SS') ,
to_char('2012-05-28 22:36:08', 'dd.mm.yyyy HH24:MI:SS')
from dual
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?