SQL Index

While executing SQL query, most important aspect to consider is performance.  So  how you achieve a good performance from database queries. Let us take the example of a book. To find any topic in a book we don’t need to reference every page of book. We refer to index and…

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What is Big Data ?

Big Data has been a buzz word for quite some time now and it is catching popularity faster than pretty much anything else in the technology world.Due to new technologies, devices, and social networking sites, the amount of data produced every year is increasing rapidly.As organizations have grown the data…

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Why Informatica is best ETL tool ?

ETL tools are required to extract, transform and load the data to Data Warehouse. ETL tools are the key to handle the database and Data  Warehouse. There are number of good ETL tools available in market which we discussed in Top 10 ETL Tools. But still Informatica has edge over…

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File Types Of Unix

As discussed in the Introdution Of Unix ,a simple description of the UNIX system, is this: “On a UNIX system, everything is a file; if something is not a file, it is a process.”  This statement is true because there are special files that are more than just files (named pipes and…

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Introduction Of Unix

UNIX is a popular operating system  for more than two decades which was first developed in the 1960s, and has been under constant development ever since.It is so popular because of its multi-user, multi-tasking environment, stability, portability and powerful networking capabilities.By operating system, we mean the suite of programs which make…

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