To get time  diff between two date column you can use this single  sql statement

Select substr(numtodsinterval([END_TIME]-[START_TIME],0),’day’),12,5)  from [TABLE_NAME];

Where [TABLE_NAME] si table where column is stored and [END_TIME],[START_TIME] are the come with date datatype having time stored in it. Out put will be rounded to minutes.

E.g

if  Start_Time=12/25/2011 8:40:21 AM

and End_time= 12/25/2011 5:20:21 PM  

output will be          08:40  

It saves my lot of time to convert and apply math on date columns. Hope its use full for some…

For that there is another way to see all errors occured in compiling  pl/sql code of any database object  from any oracle Client e.g Sql plus,Toad,Pl/sql Developer etc.You can see all error using following query

select text from dba_errors where name = ‘[OBJECT_NAME]‘ and owner = ‘[OBJECT_OWNER]‘;

Where [OBJECT_NAME] is then name of Database object which is created by this code

[OBJECT_OWNER] is the name of schema in which you are trying to create object.

Hope it will help…

To change the validation scope  you should write following line on top of KEY-NEXT-ITEM—

validate(item_scope);

if form_failure then

raise form_trigger_failure;

end if;

Now it will fire WHEN-VALIDATE-ITEM first and validate input before getting into code written on KEY-NEXT-ITEM.

]]> http://satendrakumar.wordpress.com/2011/12/30/how-to-do-validation-before-key-next-item-trigger-in-oracle-forms/feed/ 0 satendrakumar http://satendrakumar.wordpress.com/2011/06/11/oracle-not-available-shared-memory-realm-doesnot-exist/ http://satendrakumar.wordpress.com/2011/06/11/oracle-not-available-shared-memory-realm-doesnot-exist/#comments Sat, 11 Jun 2011 06:49:17 +0000 Satendra Kumar http://satendrakumar.wordpress.com/?p=58 ]]> After Restarting the machine, when I tried to log on database through sql I got the
problem.It says

“oracle not available”
“Shared memory realm does not exist”

Solution done by me after searching google:–

1.> through Sql
conn / as sysdba;

2.> startup nomount;
It shows the message

ORACLE instance started.

Total System Global Area 113246208 bytes

Fixed Size 787708 bytes

Variable Size 61864708 bytes

Database Buffers 50331648 bytes

Redo Buffers 262144 bytes

3.>alter database mount;

4.> alter database open;

Now your data base is ready to use.

ORA-28002: the password will expire within 10 days

Follow these Steps

1.connect to system/manager

2.ALTER PROFILE DEFAULT LIMIT PASSWORD_LIFE_TIME UNLIMITED;

Then reset all users passwords

e.g  alter user hr identified by hr;

alter user scott identified by tiger;

and so on then you will never need to reset password.It will set expiry limit of all password unlimited.

I have learned many things in this period during working on some Projects . I hope all people are enjoying their life .Thanks to all of you who liked my post and very sorry for not to reply some comments.

Lets start a new journey for exploring new things and share the knowledge .

But In some cases where a form application which having hard coded username & password running smooth on oracle database 10g will not work on 11g.

then we got only two option either we have to change all hard coded password on each form or disable the case sensitive logon in 11g.

First option generally not feasible when an application having large no. of forms & reports.Actully if you choose not to disable case sensitive logon then you have to agree with capital password because when a form trying to run a report then it send the userid & password to report server in capital . So you have to change password of all user in capital letters & write the same on all Forms.

For Second Option just run the following Command & u will be able to run same application on 11g as it was running on 10g..

ALTER SYSTEM SET SEC_CASE_SENSITIVE_LOGON = false

You can turn these contacts into a group in Gmail and address messages to all of them much easier and faster. Instead of entering the addressees individually, you just type the group name and let Gmail do the rest.

Set up an Address Book Group for List Mailing in Gmail

To create a group for list mailing from existing contacts in Gmail:

• Select Contacts from the left side navigation bar in Gmail.

• Check all the contacts you want to add to the new list.
• Click the Add to group … drop-down menu.
• Select New group … from the menu.
  • To add the selected contacts to an existing group, select it instead.
• Type the name by which you want the new address book group to go.
• Click OK.

Of course, you can also create an empty group:

• Select Contacts from the left navigation bar.
• Go to the Groups tab.
• Click Create Group.
• Type the desired name of the group under Group name:.
• Enter an initial set of members under Add contacts:.
  • You can add contacts already in your Gmail address book but type fresh email addresses, too. The latter will be added to your regular address book as well.

Edit the Members of a Gmail Group

To add new members to a group in Gmail, proceed as above. To remove or edit members of a mailing list:

• Select Contacts from the left navigation bar.
• Go to the Groups tab.
• Click the name of the group you want to edit.
• Check members and choose Remove from group to delete them from the group.
• Click on individual contacts to edit their details.

Send Group Mail in Gmail

With your groups set up and populated, you can now send messages to all members easily and swiftly.

1. Login in sqlplus or sqlplus or isqlplus as a user “system” with respective password.

2. Execute the following command

ALTER USER OE IDENTIFIED BY password ACCOUNT UNLOCK;

here password is your passord which you want to use for your account remember this password for further use.

3. Login in with user HR with password specified above

Now you can use all tables specified in tutorial of Oracle Forms & Reports 9i with all table.

Please leave your comment If you encounter any problem…

The following outline describes the steps required to install Oracle9i (version 9.0.1.1 or 9.0.2.1) on the Microsoft Windows NT/2000 operating system. It is assumed that this is a fresh install and that no other Oracle products are installed at this time. If this is not the case, then these instructions may not work on your system.

Where to get Oracle9i for Windows NT/2000

• Join Oracle TechNet at http://technet.oracle.com and download a trial copy.Register at TechNet, then look into Products under the category of “Oracle9i Database”. (Do not get the “9i Application Server”Oracle9i for Windows NT/2000 is about 1.5 Gigabytes (two 550 megabyte ZIP files and one 200 MB Zip file)
• Purchase a trial copy “CD Pak” from the Oracle Store at http://www.oracle.com. Each CD Pak costs about $40 for shipping and handling.
• Buy a full copy of Oracle9i from Oracle.

These instructions may or may not be applicable for other versions of Oracle (such as Personal Oracle9i, Oracle9i Lite) or for other Microsoft Windows operating systems (such as Windows 98 or Windows 95). For the record: No Oracle Product will work on Windows ME or Windows XP Home Edition so don’t even bother.

Checklist

Before you even start this process you should have:

• A Pentium III or Pentium 4 based PC with at least 800 MHz processor, 256 MB of RAM (512 is much better) and at least 10 Gigabytes of free disk space.
• If you only have 256 MB of RAM, make sure you have Windows manage at least 400 MB swap file (virtual memory).
• This machine MUST be running Windows 2000 with service pack 1 or (preferably) 2 installed. If you are running MS IIS, disable the web server (running on Port 80 by default) before starting the Oracle 9i installation.
• At least 10 GB of free disk space:

     Space to download or copy source ZIP files:  1.5 GB
     Space to unpack source ZIP files:            1.5 GB
     Space to install Oralce9i Software:          2.0 GB
     Space for Oracle data files (varies):        2.0 to 5.0 GB

The Installation Process

As with most Windows installation programs, inserting the CD-ROM (ordered or purchased from Oracle) into the CD-ROM drive automatically executes the setup program. (If this does not happen, use the Windows Explorer to view the contents of your CD-ROM drive and double click on the “setup” program there).

If you downloaded the Oracle9i from Oracle Technet, then you need to unzip the files into a three temporary directories and double click on the setup.exe program in the Disk1 directory) to get the installation process started.

The following Welcome window will appear:

It is assumed that this is a fresh install so no other Oracle products should be installed at this time.

Click on the Next button to move to the File Locations screen as shown below:

In this screen, the Source and Destination locations must be selected.

The Source path should reflect either your CD-ROM or the directory in which you unzipped the source files. Leave this as the default. In the example above, the source files were unzipped into c:\source\Oralce\9i\NT20009011\Disk1 directory.

For the Destination, leave the Oracle Home named OraHome90 as the default. Choose a hard disk drive that has at least 10 gigabytes of free space. In the example here, we are using the C: drive.

Leave the \Oracle\Ora90 path as it is (the default). If you must change this to a different drive, only change the drive letter and not the directories.

Click on the Next button to load the Product information. This may take up to 2 minutes (depending on the speed of your machine). Once the product information has been read, the following 3 “Available Products” options are presented:

Make sure the Oracle9i Database 9.0.1.1.1 is selected and click on the Next button.

The “Installation Types” screen will appear next. For this installation, we chose the Enterprise Edition.

The “Database Configuration” screen will appear next:

For this install, we chose the “General Purpose” Database option. Click on the Next button to continue.

The next step is to identify the database using the Global database name:

If some default Global database name and SID are given, keep them. Otherwise, use the following (make a note of these for later on):

Global Database Name is orcl

Oracle SID is orcl

Click on the Next button to continue to the “Data File Location ” screen

In this step, you need to select where the Oracle data files will be located. In large operations, we typically keep the data files on a separate disk (or disks), however, for this install, we are storing the data files in the same C:\oracle directory tree. Keep the default as shown and click on the Next button to continue.

In the next screen, choose the default character set for the database:

Click on the Next button to move to the “Summary” screen:

In this screen (shown above), the products and files that will be installed are summarized. Note that in this example, it will take 1.5 GB MB of disk space for the installation of the software. Additional space will be required for the default database.

If everything looks OK at this point, click on the Install button to begin the installation.

During the install, you will notice various Oracle products being copied over to the hard disk. For example, in the above figure, a portion of the Oracle Enterprise Manager is being installed.

Once the installation is completed, the next step will be to configure the various additional services and the database. This is shown below:

Each of the configuration programs will be executed in turn. The HTTP Server (Oracle/Apache) should launch automatically and open up TCP/IP port 80. You should notice a new Command window as follows:

Oracle HTTP Server Powered by Apache/1.3.12 (Win32) ApacheJServ/1.1
mod_ssl/2.6.4 OpenSSL/0.9.5a mod_perl/1.24 running...

The Net Configuration Assistant and Oracle Intelligent Agent should run automatically and not prsent any sustained screens.

The Oracle Database Configuration Assistant will appear for some time while the default database is created and opened. As below:

Once the default database has been installed, the following screen will appear:

Clicking on the Password Management button and change the default passwords for the SYS, SYSTEM, SCOTT and DBSNMP accounts as shown below:

Click the OK button when done.

This should conclude the configuration of the database and the “End of Installation” screen should appear as below. Click on the Exit button and click on the following Yes button to confirm exiting the Installation program.

At this point, be sure to reboot your computer so any final changes can take affect. In particular, the path c:\oracle\ora90\bin will be added to the PATH environment variable.

New Program Groups

After Oracle9i is installed, you will notice several new program groups in the Start menu.

These include:

• Oracle Installation ProductsTools to help manage the installation and removal of Oracle products on the machine.
• Oracle – OraHome90The set of tools used to work with Oracle90. These include:
  • Application Development – Tools to develop Oracle applications including SQL*Plus
  • Configuration and Migration Tools – Tools to migrate older Oracle databases to version 9i
  • Enterprise Management Packs
  • Enterprise Manager Quick Tours
  • Integrated Management Tools
  • Oracle HTTP Server

Starting and Stopping the Database

Under Windows NT and Windows 2000, the Oracle 9i database runs automatically as a service. Below is a view of the Windows 2000 Services mangement console showing the services installed by default:

Note the last one OracleServerORCL is the actual database process itself. OracleOraHome90TNSListener is the listener process for remote connections to the database. OracleOraHome90Agent is the Oracle Agent used to communicate with management services. Finally, the OracleOraHome90HTTPServer is the Oracle/Apache web server.

Since the OracleServerORCL service is set to start automatically, the database wll start and mount each time the computer is started up. To manage the database processes directly, one can use the Enterprise Manager Console in Stand-alone mode. From the Start menu, choose Programs -> Oracle - OraHome90 -> Enterprise Manager Console and select Launch Standalone. The following screen should appear:

Click on the plus sign to expand the Databases branch and then once again to expand the ORCL branch. When prompted for username and password, use the SYSTEM account and choose to log in as SYSDBA. In SYSDBA mode, the SYSTEM user can perform most any manipulation of the database.

Once logged in, clicking on the Instance tree and then the Configuration tree should display the current state of the database:

Testing the Installation

Once the database is running, the SQL*Plus tool can be used to connect to the database.

Go to the Start -> Programs -> Oracle - OraHome90 -> Application Development program group and run the SQL Plus application. Once SQL Plus is running, you will be prompted for 3 things: Username, password and Host String.

The default Database Administrator’s account has a username of SYSTEM and a default password of MANAGER. You may have changed the SYSTEM account password in a previous step so use the new password.

Fill in the Username and password fields with the SYSTEM account and leave the Host String field blank. Since we are connecting to a local Oracle database, no Host String is required. Click on the OK button as shown below:

If the database is running and the username and password are typed correctly, SQL*Plus should log the SYSTEM user in and present the SQL> prompt as shown below:

By default, you can also log in with the SCOTT/TIGER account. That is, there is a demo account already set up in the database with username SCOTT and password TIGER. Many of the examples in the Oracle documentation use the tables included in the SCOTT user’s account. <!–

Configuring Net8 to Connect to Nash at Baruch

If you have Personal Oracle8i installed on a PC at work or at home and you have a connection to the Internet, it is possible to connect the SQL*Plus tool to your student Oracle account at Baruch. You will need to configure the Net8 middleware by setting up a service name (host string, database or alias as it is sometimes called). At Baruch, this service name will be called Tcp-nash and it will be associated with a connection to the host nash.baruch.cuny.edu, at TCP/IP port number 1521 and Oracle instance ORCL. Before you start this procedure, be sure you are connected to the Internet. You may wish to run the ping program in an MS-DOS shell to see if you can reach the Nash server. Try: ping nash.baruch.cuny.edu and see if you get a response.

You can also test by trying to reach the Nash server’s web server by going to http://nash.baruch.cuny.edu/oracle with your web browser. The following figures illustrate configuring this new host string using the Net8 Easy Config wizard. The first step is to launch the Net8 Easy Config wizard by going to the Start -> Programs -> Oracle - OraHome81 -> Network Administration program group and selecting Net8 Easy Config. The following Welcome screen will appear: Since we want to create a new service name (host string), make sure the Create option is highlighted under the Actions area and then type in Tcp-nash in the field under New Net Service Name. Then click on the Next button to continue. In this next page, we will need to select a communications protocol: In this case, since we are communicating over the Internet, choose TCP/IP protocol and click the Next button. In the following screen, we will need to specify the Internet host name and the TCP/IP port number where the Oracle server is listening. Fill in the fields as below:

Host name: nash.baruch.cuny.edu

Port Number: 1521 Click the Next button when done. In the next screen, we will need to specify the Oracle SID. The SID is an identifier that indicates the specific instance of Oracle running on the server. Since Nash currently runs Oracle 8.0, select the second option as shown below and specify the SID as ORCL Click the Next button to continue. At this point, Net8 has all of the information it needs to make a connection to the Nash Oracle database. The next step is to test this connection and if something is not working properly, we can go back (using the Back buttons) to correct it. By default, the Net8 test attempts to connect to the database server using the SCOTT/TIGER account. However, for publicly accessible servers, we almost always delete this account since the username and password are so well known. In order to test the connection, the Net8 Easy Config will first attempt to connect as SCOTT/TIGER. Click on the Test button as shown below: As can be seen in the figure below, Net8 Easy Config attempts to connect as SCOTT/TIGER but the connection fails. To continue the test, click on the Change Login button at the bottom of the screen. When the dialog box appears, type in your own Oracle username and password as shown in the example below: After you have typed in your username and password, click the OK button. Click on the Test button for Net8 Easy Config to attempt to connect using the new username and password you just supplied. In the figure below, the connection test was successful. If the test was not successful, make a note of the error code and message. Then close the test screen and go back through the steps of the wizard again to make sure everything was specified correctly. Also make sure you can ping the Nash server (as described above) to make sure your Internet connection is working properly. Click the Close button to get out of the Test screen. Finally, click the Finish button to close the Net8 Easy Config wizard.

Testing the Net8 Connection

Now that a new service name called Tcp-nash has been created, the connection can be tested using the SQL*Plus tool. Run SQL*Plus and when the dialog box appears, supply your Oracle username and password for the Nash Oracle server and then type in Tcp-nash for the Host String as shown below. Click OK to log in to the Nash Oracle server. –>

Using the On-Line Help

If you elected to install the Personal Oracle8i documentation to your hard disk, you can access the HTML help files by going to the Start -> Programs -> Oracle - OraHome90 program group and selecting the Release Documentation item.

Your default web browser will be launched and the opening page for the Oracle documentation will be displayed.

Materials to be added

Last updated: Thu Sep 20 17:12:14 EDT 2001

Copyright 2001 R. Holowczak