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?
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 ?
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;
Is there some functions to convert the long type field data to varchar2 type?
View 2 Replies View RelatedI 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 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 have a table with VARCAHAR2 data type column, I am unable to update that column with the following data.
UPDATE we set sname='(([Emp].Job.Catageory
IN 'SALES,COMPUTER,SCIENCE,TELESERVICE')
AND ([Employee].IDtype IN 'ABC'))'
I am getting the error "ORA-00933: SQL command not properly ended"
i have one table emp in this table i have the column eno,ename,hiredate and i have data also in this table.
my eno colum data type is number so now i have to change this colum data type from number to varchar2.
if yes how can when i am trying to change this colum data type i got this error
Failed to commit: ORA-01439: column to be modified must be empty to change datatype.
I have a table with modifieddate column with 'DATE' data type.I am facing date format exception and tried with to_char, to_date but its throwing invalid number exception. how to format date accordingly.
SELECT * FROM EMP WHERE modifieddate > '31-Dec-2011 18:30';
ORA-01722: invalid number
01722. 00000 - "invalid number"
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?
I have a table type object loaded (tto) with data and am using it as :
SELECT tto.B, tto.C
FROM TABLE(tto)
WHERE tto.A = <some value>;
This is working fine. BUT, can I also select the index of each element too along with other fields of each element ?
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.
I am importing the dump.All the tables are getting imported but when it comes to the part as shown in the error it gets struck there and nothing is showed after.
Processing object type SCHEMA_EXPORT/TABLE/INDEX/INDEX
The dumps for which I am doing the import is huge. Its around 46 GB.
select
sl.sid,
sl.serial#,
sl.sofar,
sl.totalwork
from
v$session_longops sl,
v$session s,
dba_datapump_sessions d
where
s.saddr = d.saddr
and s.sid = sl.sid
and s.serial# = sl.serial#
order by start_time;
It showing the lock for two sid's. Should I kill the process and import the dump again? I used below command to import dums
impdp sys/*****@dbname directory=dump_dir dumpfile=prod_dump_%U_200311 SCHEMAS=int_aaa int_bbb int_ccc int_ddd int_eee int_fff
int_ggg int_hhh int_iii int_jjj int_kkk int_lll
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 RelatedRowid type is one of data types in oracle,is it equal to the varchar2,the flowing test show varchar2 type can contain rowid type.
SQL> Declare
2 L_Rowid1 Varchar2(18);
3 L_Rowid2 Rowid;
4 Begin
5
[Code]....
I have come one requirement where i need to extract data from a LONG RAW data type column.
View 7 Replies View RelatedI have to create a table which should store data at Week level. The table have the following columns
Product id, Loc id, Business group id, FISCAL WEEK , Revenue,
Fiscal week column will have data as '2011-W01', '2011-W47' etc.
What should be the data type for fiscal week column. Based on this table i have to create a calculated column which should fetch trailing 12 weeks average for each row.
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.
I have extracted in the following XML document some Mpeg7 visual descriptors from an image and I saved it in an XMLType column. I would like to use XMLQuery to extract the data from the Value node. how write such a query. I could not get the proper Xpath to any node.
<?xml version="1.0" encoding="UTF-8" standalone="no" ?>
<Mpeg7 xmlns="http://www.mpeg7.org/2001/MPEG-7_Schema" xmlns:xsi="http://www.w3.org/2000/10/XMLSchema-instance">
<DescriptionUnit xsi:type="DescriptorCollectionType">
[code]...
i what to update a column data type am geting this error
ORA-02267: column type incompatible with referenced column type
my query is
when i run
SELECT b.table_name||
' joins to the '||
a.table_name||
' table on '||
c.column_name||
' = '||
d.column_name Table_relationships
[code]....
I have a task to update one of the rows in a table (having only 2 columns, number and long) which is long data type. We are on Oracle 10g. Not sure how to use update for a long data type column.
I have tried using dbms_metadata_util.long2varchar, but still not getting what I want.
user@tank> create table filetable(id number(6), file_content BLOB);
0 rows affected (0.02 seconds)
vlanke@tank_db> desc filetable;
ID NULL NUMBER(6,0)
FILE_CONTENT NULL
I am new to Database field.
- I created a table with 2 columns id (datatype as number) and file_content datatype as BLOB.
- My question is under desc filetable; query why does it not show me a data type as BLOB.
- create table query does not return any error to me. How do I verify that FILE_CONTENT column has datatype as blob.
I have a table Table_xml_tmp which has a column MESSAGECONTENTS as XMLType data which contains data as follows
"<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<xclimSchemaMain xmlns="http://clones.telcordia.com">
<response>
<clHeader>
<msgName>queryPlace</msgName>
[code]......
I need to get all rows where node <operationStatus> value as SUCCESS. I am running following query but it is returning null value insted of data of columns
SELECT a.MESSAGECONTENTS.extract('/clHeader/msgName/object/msgType/sender/senderInstance/operationStatus/text()').getStringVal()
FROM Table_xml_tmp a
WHERE a.MESSAGECONTENTS.extract('/clHeader/msgName/object/msgType/sender/senderInstance/operationStatus/text()').getStringVal()= 'SUCCESS'
Is it possible to replace datatype of column of one table with another table's column datatype using %type like below
SQL>create table test1 (v1 varchar2(10));
SQL>create table test2 (v1 test1.v1%type);
Now i have a problem which i am facing for the first time. The problem is:
I have created a table test1 with two column of number data type and the column witdth is 25. Then enter the data but when i select the recrod it does not display the column data as it was entered.
SQL> create table test1
2 (
3 startno number(25),
4 endno number(25)
5 );
Table created.
SQL> insert into test1
[code]...
I have a table with structure as:
CREATE TABLE XML_TABLE_1
(
ID NUMBER NOT NULL,
SOURCE VARCHAR2(255 CHAR) NOT NULL,
XML_TEXT SYS.XMLTYPE,
CREATION_DATE TIMESTAMP(6) NOT NULL
[code].....
- So HOW do I find the total size occupied by this table. Does BINARY storage work as LOB storage. i.e. I need to consider USER_LOBS as well for this. OR foll. will work
select segment_name as tablename, sum(bytes/ (1024 * 1024 * 1024 )) as tablesize_in_GB
From dba_segments
where segment_name = 'XML_TABLE_1'
and OWNER = 'SCHEMANAME'
group by segment_name ;
- Also if I am copying it to another table of same structure as:
Insert /*+ append */ into XML_TABLE_2 Select * from XML_TABLE_1.
Then how much space in ROllbackSegment do I need. Is it equal to the size of the table XML_TABLE_1?
I have existing table which needs to be copy to new table with object using the cursor. The exist table has a rank column which has some duplicate rank, which need to be remove and provide a series of numbers, like 1,2,3,4,5,...
create type UNIVERSITY as object (
U_RANK number(2),
U_SCHOOL varchar2(150),
U_COUNTRY varchar2(150),
U_SCORE number(3)
)
[code].....
DBMS_OUTPUT:
------------
Warnings: --->
W (1): Warning: execution completed with warning
<---
0 record(s) affected
[Executed: 11/11/2012 9:12:19 PM] [Execution: 31ms]
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.
We are working on a performance tuning aspect, where in a table has a LONG datatype and number of round trips are increasing based on the number of rows fetched.i.e one round trip for every row.
Background.
1. created a table with LONG data type.
2. inserted bulk load of data.
3. set auto trace on and executed below tests..
SQL> select count(*) from test_long;
COUNT(*)
----------
6110
SQL> desc test_long
Name Null? Type
----------------------------------------------------------------------------------------------------- -------- ----------------------------------------------------------------------------
ID NUMBER
TESTLONG LONG
[code].....
but on LONG column, irrespective of the array size the round trips does not reduce.
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.