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A NoSQL (originally referring to "non SQL" or "non relational") database provides a mechanism for storage and retrieval of data that is modeled in means other than the tabular relations used in relational databases. Such databases have existed since the late 1960s, but did not obtain the "NoSQL" moniker until a surge of popularity in the early 21st century, triggered by the needs of Web 2.0 companies. NoSQL databases are increasingly used in big data and real-time web applications. NoSQL systems are also sometimes called "Not only SQL" to emphasize that they may support SQL-like query languages, or sit alongside SQL databases in polyglot persistent architectures.
Unified database insights platform for hybrid cloud
Generating queries in a heterogeneous cloud computing environment is provided. The method comprises transforming disparate statistical formats into a unified representation to standardize statistical metadata between relational databases and NoSQL databases. SQL-derived NoSQL statistics are integrated into a unified repository according to the unified representation. Mapped NoSQL statistics are integrated into relational database query optimizers. An optimal predicate pushdown strategy and an execution plan for a query across heterogeneous databases are determined according to the standardized statistical metadata. The query to the heterogeneous databases is then executed according to the relational database query optimizers and the optimal pushdown strategy and execution plan.
Owner:INTERNATIONAL BUSINESS MACHINE CORPORATION