What is the difference between an 11g and 12c oracle database?

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The main difference between Oracle 11g and 12c is that 12c introduces a multitenant architecture, enabling multiple, pluggable databases to share a common infrastructure, while 11g does not offer this feature.
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The main difference between Oracle 11g and 12c is that 12c introduces a multitenant architecture, enabling multiple, pluggable databases to share a common infrastructure, while 11g does not offer this feature.
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Oracle 11g: Traditional architecture. Oracle 12c: Introduced multitenant architecture (pluggable databases). 12c = Cloud-ready, better scalability. 11g = Legacy, single-tenant design.
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