SQL & PL/SQL :: Change Column Datatype From CLOB To Varchar2
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.
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.
I need to modify the column type that already has data in it, i need it change varchar to number then The datas entered have $ and , (e.g $3,200). I need the $ and , removed with column type set to numbers.
When i currently do this i get the following error:
The TABLE operation was not successful for the following reason:
ORA-01439: column to be modified must be empty to change datatype
I've tried unloading the data and loading the data using the spreadsheet, cut and past and csv file but both give me more errors, so i just want that one column modified.
I would need to convert the column datatype from BLOB to CLOB. currently in the table, the BLOB column has the data. the requirement is to convert this column from BLOB to CLOB datatype.
How to convert from BLOB datatype to CLOB datatype ?
I 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??
I'm facing a problem where I create a form and I want to feed time in "HH:MI" format, Firstly I choose the "Date" datatype, but during the feeding of time i.e "00:30", means if I want to feed only mints, then it doesn't accept, at the other hand if I feed "01:30" means mints with hr then it accepts.
To get rid of this problem I changed datatype "Date" to "Varchar2".
I create 3 columns on my form "TTL_WORKING_TIME" - "TTL_RUN_TIME" = "BRK_DWN_TIME". If I get any value in "BRK_DWN_TIME" column thn it has to be distribute in 3 or 4 reason of B/D, means if I get 00:30 mints brkdwn thn 00:15 mints for "reason1" and 00:15 mints for "reason2".
How I make calculation where I use "Varchar2" datatype.
here is the situation, I have to write a function that receive as parameter a datatype varchar2 and validate if the letter is less than "A" or greater than "Z", it must print do not correct, or correct depending on the situation, no problem so far, the only problem I've got is: If the symbol is ";" is valid, but i do not know how to write it, It does not depend on the PL/SQl languaje but depends on the logic itself.
DECLARE v_nombre varchar2(20):='john;%'; vv varchar2(1); begin for i in 1..length(v_nombre) loop
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".
"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.
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
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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
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 .
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 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.
<ORACLE VERSION : 11.2.0.2.0> i have created a table with CLOB as datatype for one of the columns, I am trying to store a string ( I am not sure about the length of the string) , when i am querying on my table for the CLOB column,instead of the actual string "(HUGECLOB)" is coming. How to get the actual string in case the problem is with the SIZE.
declare a clob; b varchar2; c clob; begin c:=a||b; end;
When execute above code in form runtime, I get error ora-32767.
"ORA-29287: invalid maximum line size Cause: An invalid maximum line size value was specified. Action: Correct the maximum line size to be in the range [1, 32767]."
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.
I am currently in the process of migrating our database from US7ASCII to AL32UTF8 using DMU.
I am stuck at a point where I have encrypted data that, when the conversion happens, will be destroyed. Oracle suggests to move the data which is currently stored in VARCHAR2 datatype, to a "character set safe way" like hex notation or base64 before converting.
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.
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 ?
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?
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 ?
Where '00001234' is the Invoice , '12222' is Netamount field and highlighted in red is the $ amount for that invoice.
The only data i need query to return 12222 (netamount)= $amount. I tried using substr select substr((TESTDATA),19,26)test from TABLEA; But this gives me the only the first row but not other amount which have different positions.