Tag Archives: Jshah

Database Certifications

Database Certifications

The Information Technology industry is experiencing a certification craze! Whether you’re looking for a valuable career credential or a structured approach to learning, database certifications are a good place to start.
Database Certification Spotlight: Office Specialist
If you use Microsoft Access as a regular part of your job, or you hope to gain employment in the field of user-level databases, you may wish to consider the Microsoft Office Specialist (MOS) program’s Accesstrack. This program (formerly known as the Microsoft Office User Specialist or MOUS program) allows users of the popular desktop database to prove their knowledge in a structured exam environment.
Database Certification Spotlight: OCP
Want to prove your Oracle Database Administration prowess to the world? Check out the Oracle 9i certification program!
Database Certification Spotlight: MCDBA
Interested in earning your Microsoft Certified Database Administrator (MCDBA) credential? Get off to the right start with this informative article!
Certification Spotlight: MCDBA
Interested in earning your Microsoft Certified Database Administrator (MCDBA) credential? Get off to the right start with this informative article!
Certification Spotlight: Microsoft Office Specialist
Looking to prove that you know your stuff when it comes to Microsoft Access? The Microsoft Office Specialist program may be just what you’re looking for!
Certification Spotlight: Oracle Certified Professional
Want to prove your Oracle Database Administration prowess to the world? Check out the Oracle 9i certification program!
Get Certified!
Are you a database professional seeking to polish your resume in the hopes of landing a better gig? Perhaps you’re just getting started in database administration and you’d like to establish your credentials in the field.
Brainbench Certification Programs
Brainbench.com offers free online certfication programs for numerous Microsoft and Oracle database product lines as well as general database techniques.
Cramsessions for Microsoft Certifications
Cramsession.com’s Microsoft exam study sheets provide all of the information you need to pass your certification exam in a brief summary. If you’re planning to take a Microsoft test, definitley give these guides a look!
Cramsessions for Oracle Certifications
Cramsession.com brings you concise study sheets for all of the Oracle certification exams. These are a definite “must read” for certification candidates.
Microsoft Certified Database Administrator
Think you’re an expert at SQL Server? The MCDBA program gives you the chance to prove your mettle to current and future employers. Check out this link for the program details.
IBM DB2 Certifications
Obtain details on the various professional certification programs available from IBM for the DB2 Universal Database. Programs include database administrator, business intelligence and applications development.
Oracle Certified Professional Program Fact Sheet
This concise fact sheet from Oracle offers an overview of the various tracks in the OCP program, training options and exam information. A definite “must read” before beginning your quest for Oracle certification.
Sybase Professional Certification Programs
Detailed information on the Sybase database professional and Sybase PowerBuilder developer programs direct from the source.

Database Mirroring Operating Modes

Database Mirroring Operating Modes

Database Mirroring is configured for three different operating modes. These modes are high availability, high performance and high protection. Each offers a different set of functionality and must be understood in order to select the appropriate configurations.

  • High Availability Operating Mode
    • The High Availability Operating Mode provides durable, synchronous transfer of data between the principal and mirror instances including automatic failure detection and failover. With this functionality comes a performance hit. This is because a transaction is not considered committed until SQL Server has successfully committed it to the transaction log on both the principal and the mirror database. As the distance between the principal and the mirror increases, the performance impact also increases.
    • In addition, there is an continuous ping process between all three nodes (if a witness is used) to detect failover. If witness server is not visible from the mirror, you must either reconfigure the operating mode for the database mirroring session or turn off the witness. Alternatively, you can manually fail over a database mirroring session at the mirror in High Availability Mode by issuing the ALTER DATABASE SET PARTNER FAILOVER command at the principal. The same command can also be issued if you have to take principal down for maintenance.
  • High Performance Operating Mode
    • With the High Performance Operating Mode the overall architecture acts as a warm standby and does not support automatic failure detection or failover. The data transfer between the principal and mirror instances is asynchronous. As such, this mode provides better performance and permits geographic separate between the principal and mirror SQL Server instances. Unfortunately, this mode increases latency and can lead to greater data loss in the event of primary database failure if it is not managed properly.
  • High Protection Operating Mode
    • The High Protection Operating Mode operates very similar to the High Availability Mode except the failover and promotion (mirror to principal) process is manual. With this mode the data transfer is synchronous. This mode is typically not recommended except in the event of replacing the existing witness SQL Server. After replacing or recovering the witness SQL Server, the operating mode should be changed back to High Availability Operating Mode

GIS DataTypes in SQL Server 2008

Microsoft’s SQL Server 2008 offers new support for spatial data types that some analysts say should deliver a real boost to geospatial applications and data sharing.

Expected to ship in the third quarter, the new version of SQL Server will allow storage of spatial data — in the form of points, lines and polygons — in SQL tables. The software will also offer a set of functions to allow the manipulation of this data and new spatial indexes to support the execution of these functions.

What is GIS?

geographic information system (GIS) integrates hardware, software, and data for capturing, managing, analyzing, and displaying all forms of geographically referenced information.

Why GIS?

GIS allows us to view, understand, question, interpret, and visualize data in many ways that reveal relationships, patterns, and trends in the form of maps, globes, reports, and charts.

A GIS helps you answer questions and solve problems by looking at your data in a way that is quickly understood and easily shared.

GIS technology can be integrated into any enterprise information system framework.

A GIS can be viewed in three ways:

1. The Database View

2. The Map View

3. The model View