Matches in DBpedia 2016-04 for { <http://citation.dbpedia.org/hash/eb6a5099131b48b7a4fc119f936310db0f5bd221b4e6bd30ca6634fa8b0cd0f7> ?p ?o }
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- eb6a5099131b48b7a4fc119f936310db0f5bd221b4e6bd30ca6634fa8b0cd0f7 date "February 2016".
- eb6a5099131b48b7a4fc119f936310db0f5bd221b4e6bd30ca6634fa8b0cd0f7 isCitedBy Selection_(relational_algebra).
- eb6a5099131b48b7a4fc119f936310db0f5bd221b4e6bd30ca6634fa8b0cd0f7 reason "Codd's 1970 paper that introduced relational algebra called this operation restriction, and obviously predates SQL".