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airtel since its inception has been at the forefront of technology and has steered the course of the telecom sector in the country with its world class products and services. airtel’s DSL subscriptions were growing at rapid pace in Tamil Nadu circle. The Operations Support System (OSS) is buckling down and is not able to scale up to the growing needs. The OSS was built in-house 5 years back and was developed on primitive version of one of the free database - MySQL. In order to meet the growing needs, as a first step, airtel decided to migrate the database of OSS from MySQL 3.x to Oracle 10g, a leading database for enterprise applications. The key to making this operation efficient Client approached Sigma Infosolutions.