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Thursday, May 30, 2013

Conceptual Data Model



A conceptual data model identifies the highest-level relationships between the different entities. Features of conceptual data model include:
  • Includes the important entities and the relationships among them.
  • No attribute is specified.
  • No primary key is specified.
The figure below is an example of a conceptual data model. 

Wednesday, May 29, 2013

How to use ISTOOL for EXPORT IMPORT in DataStage



Location of command:

UNIX: /opt/IBM/InformationServer/Clients/istools/cli
Windows: IBM\InformationServer\Clients\istools\cli



Export command sample:

domain name: SERVER.us.ibm.com
port no: 9080
DS Server name: SERVER
DS Project name: Test

Monday, May 27, 2013

Connect Oracle Database as SYSDBA



Log into the database via sqlplus with sysdba priv’s with a single command. This can be setup with an alias, if you’d like.

#. Log into the server as the oracle user and ensure you have the effective group of the appropriate DBA group. Typical unix installations have the OS user as ‘oracle’ and the dba group as 'dba' (not to be confused with the ‘oinstall’ group).  

#. Check your account with the unix ‘id’ command. Make sure your environment variables are set to the appropriate database:

Friday, May 24, 2013

Issuing commands to a Queue Manager (runmqsc)



Once we have created a Queue Manager, we will want to perform administrative tasks, such as creating queues, among others. To enable us to communicate with our Queue Manager, we use the RUNMQSC MQ command, which opens the MQSC (MQ Script Center) environment.

After entering the MQSC environment, we can issue one of the following MQSC commands: ALTER, CLEAR, DEFINE, DELETE, DISPLAY, END, PING, REFRESH, RESET, RESOLVE, RESUME, START, STOP, or SUSPEND. Each of these commands has it's own options, which are shown in the following table:


Friday, May 17, 2013

What Service is Running on which Port in Windows




Finding out what application is running on a specific port in Windows is easy by using two command line utilities. By using netstat with the proper switches you can list out all of the ports that are being used and then use Tasklist to list all of the applications that are running. The combination of the two utilities will allow you to figure out which application us using which port.

As an example you can use the below directions to figure out At which port Oracle is running....

Thursday, May 16, 2013

Cannot authenticate user in DataStage


When you attempt to start one of the InfoSphere DataStage Administrator clients, the following message is displayed:

Failed to authenticate
the current user against the selected Domain:  Invalid user name (username) or password.


Solutions

Wednesday, May 15, 2013

Diagnosing DataStage Job Monitor problems


DataStage job run statistics (i.e. rows per second processed) do not update in DataStage Designer or Director clients.

 

Check these details :

This section contains a quick series of diagnosis steps for those familiar with DataStage and Job monitor. If more detail is needed for any step, please refer to the more detailed instructions in the "Resolving the Problem" section:
If customer has checked and verified that the following:

Monday, May 13, 2013

TeraData EXPLAIN Command


The EXPLAIN command is a powerful tool provided with the Teradata database. It is designed to provide an English explanation of what steps the AMP must complete to satisfy the SQL request. The EXPLAIN is based on the PE's execution plan.
The Parsing Engine (PE) does the optimization of the submitted SQL, the creation of the AMP steps and the dispatch to any AMP involved in accessing the data. The EXPLAIN is an SQL modifier; it modifies the way the SQL operates. 

Thursday, May 09, 2013

Stopping and Starting Oracle 11g Database Services in Windows



There are lot of services consuming a lot of CPU when an Oracle DB is running on machine. If you are using Oracle for learning/testing purpose only then you do not want to keep it up all the time.

So, here I am sharing 2 batch files for Stopping & Starting the Oracle Services on Windows which can do your work in one click only...


Wednesday, May 08, 2013

Tuesday, May 07, 2013

TeraData SHOW command


The Teradata Database offers several types of help using an interactive client.
There are times when you need to recreate a table, view, or macro that you already have, or you need to create another object of the same type that is either identical or very similar to an object that is already created. When this is the case, the SHOW command is a way to accomplish what you need. The intent of the SHOW command is to output the CREATE statement that could be used to recreate the object of the type specified.

SHOW TABLE <table-name>; 
Displays the CREATE TABLE statement needed to create this table.

Monday, May 06, 2013

TeraData HELP command




HELP Command in Teradata plays a important role, This is something like “DESCRIBE” command in Oracle and DB2. This will display the object details.

The HELP Command is used to display information about database objects such as
     Databases and Users
     Tables
     Views
     Macros

HELP retrieves information about these objects from the Data Dictionary. Below are the syntactical options for various forms of the HELP command:

Thursday, May 02, 2013

JDBC connection with Teradata



Today I am going to tell you how to connect to TeraData via JDBC, Here I have used a RazorSQL tool.  For JDBC connection with TeraData, you can find the JDBC drivers here. Teradata JDBC driver enables all Java applications to connect a Teradata database using a well-established industry standard Java Database Connectivity (JDBC) API interface.

A new database connection can be obtained in a standard JDBC way by using java.sql.DriverManager.getConnection method with a proper connection string to get a new instance of java.sql.Connection.

The simplest database connection string would be:

Wednesday, May 01, 2013

datastage4you QAnT - April2013 - 2


Click here ---> datastage4you QAnT - April2013 - 1

#14. DataStage Server – starting the server
a) DB2
su - db2inst1 -c "db2start“
b) WAS Server
/opt/IBM/WebSphere/AppServer/bin/startServer.sh server1 -user wasadmin -password PASSWORD
c) NODE
/opt/IBM/InformationServer/ASBNode/bin/NodeAgents.sh start
d) Engine
/opt/IBM/InformationServer/Server/DSEngine/bin/uv -admin -start