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It´s no wonder SQL skills count among the most desired IT skills for years in a row, Because, SQL proved its existence everywhere and all times. From the E. F. Codd´s model for RDBMS in 1970 to present SQLite for Android Phones and iPhones, the SQL has several changes in its implementation. It runs banks, hospitals, universities, governments, small businesses, large ones, just about every computer and every person on the planet eventually touches something running SQL. SQL is an incredibly successful and solid technology. Becoming professional in working with SQL will brighten one´s sustainable life in IT industry. This book is intended to enrich the programming capacity in SQL. This book mainly focused to illustrate the SQL concepts by example queries rather giving theoretical ideas.

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Dr. C. Balakrishnan is Assistant Professor, Alagappa Institute of Skill Development, Alagappa University, Karaikudi, India, formerly teaching in St. Joseph´s College, Tiruchirappalli, India. He has completed an on-line course on ´MongoDB for DBAs´ offered by 10gen Inc. He has several international publications and books.

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