Register | Login

Published Articles

Difference between Import and Load utility

Posted by jyothsnav 2337 days ago (Editorial)

The import utility copies data using SQL insert or update operations, as a result each row processed must be checked for constraint compliance and all activities performed is recorded in the databases transaction log files.


Load utility, inserts data into a table by building data pages consisting of several individual rows of data and writing those pages directly to the table space con

Entity Relationship Diagrams

Posted by jyothsnav 2347 days ago (Editorial)

There are serveral notations for data modeling. The actual model is frequently called Entity Relationship model, because it depicts data in terms of the entities and relationships described in the data. An entity -relationship model (ERM) is an abstract conceptual representation of structured data. Entity-relationship modeling is a relational schema database modeling method, used in software e


Data Modeling

Posted by jyothsnav 2348 days ago (Editorial)

Data modeling is the process of creating a data model by applying formal data model descriptions using data modeling techniques.


Data modeling is a method used to define and analyze data requirements needed to support the business process of an organization. The data requirements are recorded as a conceptual data model with associated data definitions.


Actual i

Conceptual, logical and physical schemas

Posted by jyothsnav 2348 days ago (Editorial)

A data model instance may be one of 3 kinds:


Conceptual Schema: describes the semantics of a domain, being the scope of the model. For example, it may be a model of the interest area of an organization or industry. This consists of entity classes, representing kinds of things of significance in the domain, and relationships assertions about associations between pai

DB2 Load Utility

Posted by jyothsnav 2337 days ago (Editorial)

Like the Import utility, the LAOD utility is designed to read data directly from an external file and store it in a specific table. However, unlike when the import utility is used, when the Load utility is used the table to which data is to be copied must already exist in the database before the load operation is initiated.


Syntax:


LOAD FROM [filename] OF [DEL|ASC|IXF]



DB2MOVE utility

Posted by jyothsnav 2337 days ago (Editorial)

Its easy to see how the export utility can be used together with the import utility or load utility to copy a table from one database to another, but what if we want to copy several tables or an entire database?


In this case, data can be copied table by table using export/import/load but a more efficient way to copy an entire DB2 database is by using the DB2MOVE utility.


DB2MOV

DB2 Import Utility

Posted by jyothsnav 2337 days ago (Editorial)

One way to copy data from an external file to a database is by using DB2's import utility; the import utility is desgined to read data directly from an external file (provided the file is written in a format that is supported by DB2) and insert it in a specific table or updatable view.


Syntax:


IMPORT FROM [filename] OF [DEL|ASC|IXF|WSF]


COMMITCOUNT [commitcount] | COMMI

DB2 Export Utility

Posted by jyothsnav 2337 days ago (Editorial)

The export utility is designated to extract data from a DB2 database table or view and externalize into a file using the file formats like DEL (Delimited ASCII), WSF (worksheet format), IXF (PC Information Exchange Format). Such files can then be used to provide data values to other databases and software applications such as spreadsheets and word processors.


Syntax:


EXPORT TO

SQL0911N and SQL0913N Error Code

Posted by jyothsnav 2347 days ago (Editorial)

 


SQL0911N - The current transaction has been rolled back because of a deadlock or timeout. Reason code (reason-code)


SQL0913N - Unsuccessful execution caused by deadlock or timeout. Reason code (reason-code)


The current unit of work was involved in an unre

Modifying Existing Buffer pools

Posted by jyothsnav 2348 days ago (Editorial)

Earlier we have seen how to create the Bufferpool in DB2, this article explains you to modify the sizes of existing buffer pools. Because of data constantly changes, it is easy to see how it may be necessary to modify the sizes of existing buffer pools many times in order to maintain optimal performance.This can be done by using the ALTER BUFFERPOOL command.


Syntax:

DB2 CREATE DB in Restrictive Mode

Posted by jyothsnav 2426 days ago (Editorial)
DB2 CREATE DB SAMPLE RESTRICTIVE

RESTRICTIVE

If the RESTRICTIVE option is present it causes the restrict_access database configuration parameter to be set to YES and no privileges or authorities are automatically granted to PUBLIC.

If the RESTRICTIVE option is not present then the restrict_access database configuration parameter is set to NO and all of the following privileges are auto
Sort News
Username:

Password:

Remember:
YourWiz.com, is a website that will allow everyone to share their knowledge, tip or information through community micro blogging.