Avoid double counting of mapped database data
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United States of America Patent
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Jan 30, 2018
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app pub date -
Dec 1, 2014
filing date -
Dec 1, 2014
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Abstract
As disclosed herein a method, executed by a computer, for avoiding double counting in the presence of many-to-many relationships in database data includes receiving a report definition from a data management system, detecting a bridge table defining many-to-many relationships between at least two datasets, generating a query plan with layered sub-queries, and executing the query plan including the layered sub-queries to provide query results corresponding to the report definition. A query plan with layered sub-queries may include instructions to join, partition, normalize, group, and summarize tabular data. Additionally, a conditional selection operation may be used to detect and eliminate duplicated data from a field specified in the report definition. The resulting query plan may be executed as a single query language. A computer program product and an apparatus corresponding to the described method are also disclosed herein.
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