Databases Eligibility

Hello,
Following are the various courses in databases:
Database Administrator (DBA): Responsible for installing, configuring and maintaining a database management system (DBMS). Often tied to a specific platform such as Oracle, MySQL, DB2, SQL Server and others.
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Database Developer: Works with generic and proprietary APIs to build applications that interact with DBMSs (also platform specific, as with DBA roles).
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Database Designer/Database Architect: Researches data requirements for specific applications or users, and designs database structures and application capabilities to match.
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Data Analyst/Data Scientist: Responsible for analyzing data from multiple disparate sources to discover previously hidden insight, determine meaning behind the data and make business-specific recommendations.
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Data Mining/Business Intelligence (BI) Specialist: Specialises in dissecting, analyzing and reporting on important data streams, such as customer data, supply chain data, transaction data and histories, and others.
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Data Warehousing Specialist: Specialises in assembling and analyzing data from multiple operational systems (orders, transactions, supply chain information, customer data and so forth) to establish data history, analyze trends, generate reports and forecasts and support general ad-hoc queries.
There are no basic eligibility criteria for enrolling in a database course. The course duration varies from one institute to another.
A database is used by almost all companies today, either in a raw state or along with any other web application or stand-alone application, and thus this course finds massive job opportunities.