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Informatica and ab-intio are ETL tools and knowing one of them will get you a job!
cognos, Business objects and Reportnet are front end reporting tool. Again knowing cognos or Business objects will get you a job but each one has multiple modules.
Erwin is for modelling databases.
If your institute is going to teach you all, good but try to concentrate on either front end or backend (etl).
zafar
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