Data Guard :: Column Name Is Null In V$archive_log?

Jul 22, 2010

In V$Archived_log, the column "name" showed No any content?

select name,SEQUENCE#,ARCHIVED,APPLIED,DELETED,STATUS,COMPLETION_TIME from v$archived_log

NAME SEQUENCE# ARC APP DEL S COMPLETIO
------------------------------ ---------- --- --- --- - ---------
2565 YES NO YES D 20-JUL-10
2566 YES NO YES D 21-JUL-10
2567 YES NO YES D 21-JUL-10
2568 YES NO YES D 22-JUL-10
2569 YES NO YES D 22-JUL-10
2570 YES NO YES D 22-JUL-10

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Data Guard :: How To Restore Archive_log From Tape Backup

Aug 16, 2012

I got missed the archivelog from primary DB.now its got deleted. But now it is stored in Tape_backup. i don't know about tape backup. how to access and restore the archive_log from tape backup. My tape setup is Legato..ultrium.

os:Hp-ux
DB:Oracle9i

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SQL & PL/SQL :: Date Field - Not Null Column To NULL

Mar 16, 2011

I have a table which has a not null column. the column is date field. I am trying to change it to Null. But it is giving a error.

I am using below query.

ALTER TABLE T_test
modify (paid_to_date null)

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SQL & PL/SQL :: How To Modify Null Column To Not Null

Jan 9, 2012

when i follow this steps mention on this website

[URL].........

to modify column from null to not null i got this error and on this website its show successful

my steps are

first i create a table

SQL> create table Stu_Table(Stu_Id varchar(2), Stu_Name varchar(10),
2 Stu_Class varchar(10));

Table created.

Then insert some rows into Stu_Table

SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(1,'Komal');

1 row created.

SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(2,'Ajay');

1 row created.

SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(3,'Rakesh');

1 row created.

SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(4,'Bhanu');

1 row created.

SQL> insert into Stu_Table (Stu_Id, Stu_Name) values(5,'Santosh');

1 row created.

SQL> select * from Stu_Table;

ST STU_NAME STU_CLASS
-- ---------- ----------
1 Komal
2 Ajay
3 Rakesh
4 Bhanu
5 Santosh

Table Structure is like this

SQL> Describe Stu_Table
Name Null? Type
----------------------------------------- -------- ----------------------------
STU_ID VARCHAR2(2)
STU_NAME VARCHAR2(10)
STU_CLASS VARCHAR2(10)

now when i try to modify this Stu_id column to not null its give me error.

SQL>ALTER TABLE Stu_Table MODIFY Stu_Id int(3)not null;
ALTER TABLE Stu_Table MODIFY Stu_Id int(3)not null
*
ERROR at line 1:
ORA-01735: invalid ALTER TABLE option

and when i try to add new column with not null its also gives me error

SQL> ALTER TABLE Stu_Table add C1_TEMP integer NOT NULL;
ALTER TABLE Stu_Table add C1_TEMP integer NOT NULL
*
ERROR at line 1:
ORA-01758: table must be empty to add mandatory (NOT NULL) column

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PL/SQL :: How To Update Null Data With Previous Not Null Data

Oct 25, 2012

Initially i have inserted the data into table like

Date                   xxx       yyyy
1/1/12 1 1
2/1/12 null null
3/1/12 null null
4/1/12 1 1
5/1/12 1 1
6/1/12 null null

in above example data is null for some date here my requirement is how can i copy before not null data(1/1/12) to *2/1/12, 3/1/12* .

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Data Guard :: Rolling Upgrade Physical Data Guard

Jul 5, 2011

We have physical data guard configured version (10.2.0.4). We are in need to upgrade primary & standby database to 11G R2. Can we perform rolling upgrade.

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Data Guard :: How To Know Current Active Guard Settings In Standby Database

Oct 17, 2012

Controlling User Access to Tables in a Logical Standby Database can be controlled using the following command:

ALTER DATABASE GUARD STANDBY;

My simple question is: how can I know the current active Guard setting in the standby database?

Oracle 11g R2.

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If Column A Is NOT NULL Then Column B Cannot Be NULL

Dec 2, 2011

i've got a project and im wondering whether it is possible to create an if statement that says something like

"If column A is NOT NULL then column B cannot be NULL"

would I have to do this as a trigger or a constraint?

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Index On Null Column

Oct 31, 2012

I have a table with column A which contains very few null values. I need to select these rows. I am considering two options:

a) create function based index on NVL(A, 0) and use this in where clause NVL(A, 0)=0 (column doesn't have values 0)
b) create function based index on NVL2(A, 0, NULL) and and use this in where clause NVL2(A, 0, NULL) = 0

First idea was option A. But I realized in option B the index will be much smaller, because most of values of column A isn't NULL so NVL2 will return NULL and index will not have as much leafs as in NVL. It is good idea to use NVL2? Is there any against to use option B instead of A?

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SQL & PL/SQL :: Rows With Column Value Always NULL

May 31, 2011

I have a table with columns emp_i, LOC_C and SUBSID_C. I want to find all emp_i's with LOC_C OR SUBSID_C as always NULL. Please note that the value should be NULL, always, for all dates.

--------------------------------------------
EX:
emp_i----LOC_C---SUBSID_C--Eff_Date
100------20------30--------01/01/2011
101------NULL----10--------05/01/2011
102------NULL----NULL------02/01/2011
101------20------NULL------02/01/2011
102------NULL----NULL------05/01/2011
103------NULL----20--------01/01/2011
103------NULL----NULL------02/01/2011
--------------------------------------------

The query ---
should return 102 as LOC_C OR SUBSID_C is ALWAYS NULL.
should return 103 as LOC_C is ALWAYS NULL.
should not return 101, as LOC_C is not ALWAYS NULL.
In other words, the query should give list of emp_i who never ever had a non-null value for LOC_C OR SUBSID_C. The purpose is to find the emp_i for which the columns LOC_C and SUBSID_C are never used.

I tried the query:
---------------------------------------------------
SELECT DISTINCT ORG_EMP_I FROM tab1
WHERE ORG_GRP_I = 58
AND ORG_EMP_I NOT IN (
SELECT DISTINCT org_emp_i
FROM tab1 ap
WHERE ap.ORG_GRP_I = 58
AND trim(ap.LOC_C) IS NOT NULL OR ap.ORG_SBSID_C IS NOT NULL )
---------------------------------------------------

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SQL & PL/SQL :: Unique Constraint When 1 Column Is Not Null

Jun 15, 2012

I have 3 columns in a table: colX, colY, colZ.

Trying to find a way to prevent duplicates with these, but only if colX is not null.

For example, if there are already values for: colX = 1, colY = 1, colZ = 1

then:

Allowed: colX = null, colY = 1, colZ = 1
Not allowed: colX = 1, colY = 1, colZ = 1

I can't create a unique constraint on these columns because there are many null values for column colX, and as mentioned, when colX is null, colY and colZ can be any values.

I also tried using a before insert trigger to find duplicates before posting and raise an error if found, but this causes an ORA-04091 mutating error since the trigger in the table is referencing itself to check for duplicates.

Also, I know there is something called a function based index, but I cannot use those with my code, so I need another solution if possible.

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SQL & PL/SQL :: Display Output For Null Column

Jul 24, 2012

I am having following table, and below are the out put and desired output.

CREATE TABLE tbl1
(
mon VARCHAR2(10)
, grp VARCHAR2(50)
, visits NUMBER
, redirect VARCHAR(50)
)
;

[Code]....

Query:

SELECT
mon
, grp
, SUM(visits)
FROM
tbl1
WHERE
redirect IS NOT NULL
GROUP BY mon, grp
;

Output:

May-12 Green 16
May-12 Blue 20
May-12 Yellow 13

Desired Output:

May-12 Green 16
May-12 Blue 20
May-12 Yellow 13
May-12 Red 0
May-12 Orange 0

How can this be acheived?

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PL/SQL :: Forcing A View Column To Not Null?

Aug 1, 2012

I'm having trouble creating a view that has a not null column. Using this script you can see that the resulting table doesn't have a not null constraint for the first column even though both source columns for that row are not null. Is there anyway to force the view to mark that first column as not null? (I need it for ODP.NET otherwise I get an error there)

DROP TABLE MYTABLE;
CREATE table MYTABLE
( COL1 NUMBER(2) NOT NULL,
col2 number(2)) ;
drop table mytable2;
CREATE table MYTABLE2

[code]....

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SQL & PL/SQL :: Interval Partitioning And NULL Column Values

Mar 12, 2010

Our organization is attempting to learn more about the partitioning features of Oracle 11g. I've been reading the partitioning manuals, and I have not found a clear answer on this topic, but I suspect I know the answer.

If you create a range partitioned table; using interval partitioning, say something like this:

CREATE table range_parti (
CODE NUMBER(5),
DESCRIPTION VARCHAR2(50),
CREATED_DATE DATE)
PARTITION BY RANGE (created_date)
INTERVAL (NUMTOYMINTERVAL(1,'MONTH'))
(
PARTITION my_parti VALUES LESS THAN (TO_DATE('01-NOV-2007','DD-MON-YYYY'))
);

but you try to insert a null value as the partition key, you get the following error:

SQL> INSERT INTO range_parti VALUES (1,'one',NULL);
INSERT INTO range_parti VALUES (1,'one',NULL)
*
ERROR at line 1:
ORA-14400: inserted partition key does not map to any partition
Elapsed: 00:00:00.07

Is there no way to tell it to use a default partition for NULL values? Or specifically designate a partition for NULL values WITHOUT having to manually list out each partition? It seems it works if you don't use the INTERVAL keyword, list out your partitions, and use MAXVALUE. However, our hope to avoid having that as it creates monstrously huge DDL statements for tables that have lots of date ranges, and we will be forced to manually add new partitions each month as data is added/time passes.

It appears from my experience so far, if your column can allow nulls, you cannot use interval range partitioning on that column.

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SQL & PL/SQL :: Is NOT NULL Needed If A CHECK Constraint Is On Column

Dec 13, 2010

In the below code, do I need the 'NOT NULL' after the 'state char(2)'? I am guessing that I do not need it since I have the CHECK constraint on the column.

CREATE TABLE employee(
id PRIMARY KEY,
first varchar(20) NOT NULL,
middle varchar(20),
[code]....

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Precompilers, OCI & OCCI :: Data Lost After Adding Null Terminator For VARCHAR Data Received From Database

Dec 13, 2010

We are migrating a proc application as described below.

Old Env: UNIX
Old DB: Oracle 8i

New Env: Linux
New DB: Oracle 11g

New modules are successfully compiled in Linux environment. But we are facing issues in writing the output of VARCHAR datatype to a file.

find below the extract of code.
EXEC SQL BEGIN DECLARE SECTION;
varchar mcolmnvarchar[4];
EXEC SQL END DECLARE SECTION;

EXEC SQL DECLARE crs CURSOR FOR
SELECT NVL(colmn,' ') FROM table1

memset(mcolmnvarchar.arr,'�',4); //Was added for only Linux migration. Not present in unix env.

EXEC SQL FETCH c1 INTO :mcolmnvarchar;

cout << "Data at Stage one"<< mcolmnvarchar << endl;
mcolmnvarchar.arr[mcolmnvarchar.len]='�';
cout << "Data at Stage two"<< mcolmnvarchar << endl;
fprintf(fptr,"%-4s",mcolmnvarchar.arr);

Above code works absolutely fine in Unix env with Oracle 8i. But with Linux env & Oracle 11g it is not working. No compilation or run time errors. Data at Stage one prints the output of database properly. But after null terminator code, Data at Stage two statement prints without any value. Value is lost after null terminator code.

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SQL & PL/SQL :: Query To Return Not Null Column Values With Priority

Dec 22, 2011

I have a table with multiple rows for the KEY attribute(its not a primary key) and a Rank for each row.

I want a query which fetches one row per KEY attribute.The row with lesser Rank should be considered. But in-case if the value is null for any column the value for next Rank should be considered.

WITH TMP_TBL AS
(
SELECT * FROM (
SELECT 'A' DUN,'1' RNK,'A21' col1,NULL col2,'A41' col3,NULL col4 FROM dual
UNION ALL
SELECT 'A','2','A122','A23',NULL,NULL FROM dual
UNION ALL
SELECT 'A','3','A32','A33',NULL,'A35' FROM dual
[code].......

DUN is the KEY attribute . RNK is the Rank for each Row. COL1... COL4 are data attributes

The results I am expecting is

DUNCOL1 COL2 COL3 COL4
AA21 A23 A41 A35
BB12 B23 B15
CC12 C13 C33 C14

I want this to be done with SQL only. So I tried various ways but none were successful.Finally I created a Multi Row function row_nvl and it worked.

SELECT DUN,
row_nvl(rownvl_param_type(RNK,col1)),
row_nvl(rownvl_param_type(RNK,col2)),
row_nvl(rownvl_param_type(RNK,col3)),
row_nvl(rownvl_param_type(RNK,col4))
FROM TMP_TBL
GROUP BY DUN

But I don't think my manager will allow me to deploy a Multi Row function .

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Reports & Discoverer :: Count Records With Not Null Column

Jun 25, 2013

i want to count group above report records! want to count department group employees there in time is not null!

my report query

SELECT div.division,
DEP.DEPARTMENT,
DEP.STRENGTH,
E.EMPLOYEECODE,
E.NAME,
DES.DESIGNATION,
[code].....

im doing it with formula column!

function CF_PRESENTFormula return Number is
v_emps number;
begin
select count(1)
into v_emps
[code]......

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SQL & PL/SQL :: Query To Display Repeated Column Values As Null?

Dec 13, 2012

I have table with the values as below.

C1C2C3C4
NAMEJOHN10ABC
NAMESMITH30DEF
NAMEROBERT60XYZ

I dont want to print the repeated value(NAME) of C1 multiple times as below.

C1C2C3C4
NAMEJOHN10ABC
SMITH30DEF
ROBERT60XYZ

I could do it using the below query using union with the rownum.

select * from (
select rownum rn, c1,c2,c3,c4 from table_new
) where rn =1
union
select * from (
select rownum rn, decode(c1,null,null),c2,c3,c4 from table_new
) where rn between 2 and 3

Is there any other way of displaying using a single sql query.

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SQL & PL/SQL :: Query To Retrieve Number Of Not Null Rows For Each Column?

Jul 7, 2011

I need a generic query to generate total # of records for each table in a schema, total # of records that are not null for each column in the table, and total # of records that are null for each of those columns in those tables.

ex:

the output should look like this.

owner schema table_name total# recs in the table, column_name,
------ ------ ---------- ------------------------- -----------

# of records not null # of records null
---------------------- --------------------

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PL/SQL :: How To Insert Null Record (some Column) In Table Using Loop

Jul 5, 2012

How to insert null record (for some columns) in table using loop.

sample data of x_tab

order_id order_name

231 xxx
123
345
111 vvvv

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SQL & PL/SQL :: Entering Values As Not Null Constraint To Column In Oracle Without Disturbing Old Records

Jul 1, 2013

previously i set null constraint to the column and creating some rows and need to change new entering values as not null constraint to the column in oracle without disturbing the old records. how can I do that.

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Server Utilities :: IMPDP Error ORA-31693 On Oracle Virtual Column With Not Null?

Jun 21, 2013

I am having issue with IMPDP on ORACLE VIRTUAL COLUMNS.I am having following table with Virtual column defined with Not null. Expdp is fine without any issue.

DDL :
------
CREATE TABLE alert_hist
(
alertky INTEGER NOT NULL,
alertcreatedttm TIMESTAMP(6) DEFAULT systimestamp NOT NULL,
alertcreatedt DATE GENERATED ALWAYS AS (To_date(Trunc("alertcreatedttm"))) VIRTUAL NOT NULL

When I do the import (IMPDP) it got failed with the following error.

. . imported "TESTSCHEMA"."VALART" 359.1 KB 4536 rows
ORA-31693: Table data object "TESTSCHEMA"."ALERT_HIST" failed to load/unload and is being skipped due to error:
ORA-39097: Data Pump job encountered unexpected error -1

After that I dropped the Virtual Not null column and recreated that column with Nullable.

DDL :
-----
alter table alert_hist drop column alertcreatedt;
alter table alert_hist add alertcreatedt DATE GENERATED ALWAYS AS (To_date(Trunc("alertcreatedttm"))) VIRTUAL;

After that I took the expdp and impdp , it went fine with out any issue.

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Data Guard :: Unable To Get Data Of Primary In Standby Database (dataguard)

Jan 16, 2013

i have configured physical standby in my local system, to check logshipping i created a table at primary db, wen i tried to check in standby, it says table does not exist..below are primary & standby alert entries..

Primary alert log

Fatal NI connect error 12514, connecting to:
(DESCRIPTION=(ADDRESS=(PROTOCOL=TCP)(HOST=172.16.0.98)(PORT=1522))(CONNECT_DATA=(SERVER=DEDICATED)(SERVICE_NAME=STAND)(SERVER=dedicat ed)(CID=(PROGRAM=d:oracle11gappadministratorproduct11.1.0db_1inORACLE.EXE)(HOST=A960M)(USER=SYSTEM))(SERVER=dedicated)))
VERSION INFORMATION:
TNS for 64-bit Windows: Version 11.1.0.6.0 - Production

[code]....

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Data Guard :: Changing Dbname / Sid / Data / Control File Locations?

Nov 5, 2010

I want to change dbname,sid,data/control file locations in operational dataguard setup i plan to follow as below

1)shutdown primary and standby (stop managed recovery)

2)change db name in init.ora of primary and standby change database name control file location

3)create control file for primary from trace(script) make changes for db name and file locations

4)mount and open primary database

5)create standby control file

6) transfer standby control file to standby

7) mount stand by database and start manage recovery

If this steps will error free do i need to follow any thing additional to this or what is other best way for this or its not possible at all

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Data Guard :: Buffer Busy Waits On UNDO Data In Active DG

Feb 24, 2013

Oracle Version: 11.1.0.7.0
Active Dataguard

Statspack has been configured for Active Dataguard on Primary database.We got an spike of Buffer busy waits for about 5 min in Active Dataguard, this was causing worse Application SQL's response time during this 5 min window.Below is what i got from statspack report for one hour

Snapshot       Snap Id     Snap Time      Sessions Curs/Sess Comment
~~~~~~~~    ---------- ------------------ -------- --------- -------------------
Begin Snap:      18611 21-Feb-13 22:00:02      236       2.2
  End Snap:      18613 21-Feb-13 23:00:02      237       2.1
   Elapsed:               60.00 (mins)
[code]...

Why there could sudden spike of demand on UNDO data in Active Data Guard ?

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Data Guard :: DATA FILES IN Storage Area Network (SAN)

Mar 29, 2011

I am working in a bank as an system consultant, i have a SAN Storage Area and oracle as below.

SAN 1

This interface includes the DATA FILES of the oracle tablespace

SAN 2

SAN1 Mirrors the DATA FILES of the oracle tablespace to SAN 2

1. Can i rely on real time data recovery from SAN2 ?
2. if SAN1 (Data Files are currupted) will the SAN2 Data Files will be currupted as well.
3. If the SAN2 is currupted then what Oracle Features can be used to have uncurrupted data.

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Data Guard :: ORA-01157 / Cannot Identify / Lock Data File 1

Jul 23, 2010

i did everything writen but when i do *SQL>alter database recover managed standby database disconnect from session;*

i go and look in the standby database AlertLog file ,and thats whats writen

*ORA-01157: cannot identify/lock data file 1 - see DBWR trace file
ORA-01110: data file 1: 'F:ORACLEPRODUCT10.2.0ORADATADBSYSTEM01.DBF'
ORA-27041: unable to open file
OSD-04002: غير قادر على فتح الملف
O/S-Error: (OS 3) The system cannot find the path specified.

[code]....

strange thing that it realises the primary database in drive F and it goes to it but i dont understand what could be the reason of this ,although im doing this command while primary database is shutdown!

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Data Guard :: ORA-01354 / Supplemental Log Data Must Be Added To Run This Command

May 2, 2012

I configure logical standby online .when I execute dbms_logstdby.buid,first

SQL> EXECUTE DBMS_LOGSTDBY.BUILD;

it was blcoked by other sesson,then i kill the holding session,but no work.then i cancel this step and execute it again . the error is

SQL> EXECUTE DBMS_LOGSTDBY.BUILD;
BEGIN DBMS_LOGSTDBY.BUILD; END;
*
ERROR at line 1:
ORA-01354: Supplemental log data must be added to run this command
ORA-06512: at "SYS.DBMS_LOGMNR_INTERNAL", line 3669
ORA-06512: at "SYS.DBMS_LOGMNR_INTERNAL", line 3755
ORA-06512: at "SYS.DBMS_LOGMNR_D", line 12
ORA-06512: at line 1
ORA-06512: at "SYS.DBMS_INTERNAL_LOGSTDBY", line 370
ORA-06512: at "SYS.DBMS_LOGSTDBY", line 157

[code]....

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Data Guard :: Data Files Locations On Oracle 11gR2

Jun 15, 2012

I have set up a cross platform (Microsoft Windows IA (32-bit) -> Linux x86 64-bit) data guard and it worked fine.Then I did a switch over (which again worked) and found out the data is not getting replicated at all.. checked the data files available from the new primary database and found out they are in the windows format as below..

SQL> select name from v$datafile;

NAME
--------------------------------------------------------------------------------
D:ORACLEAPPADMINISTRATORORADATAMFSSYSTEM01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSSYSAUX01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSUNDOTBS01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSUSERS01.DBF
D:ORACLEAPPADMINISTRATORORADATAMFSRMANRMAN_TS01.DBF

and physically they were created at '/home/app/oracle/product/11.2.0/db_1/dbs/' and as

D:ORACLEAPPADMINISTRATORORADATAMFSREDO02.LOG
D:ORACLEAPPADMINISTRATORORADATAMFSREDO03.LOG
D:ORACLEAPPADMINISTRATORORADATAMFSRMANRMAN_TS01.DBF

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