Query Containment

См. также в других словарях:

• Conjunctive query — In database theory, a conjunctive query is a restricted form of first order queries. A large part of queries issued on relational databases can be written as conjunctive queries, and large parts of other first order queries can be written as… …   Wikipedia

• Complexity of constraint satisfaction — The complexity of constraint satisfaction is the application of computational complexity theory on constraint satisfaction. It has mainly been studied for discriminating between tractable and intractable classes of constraint satisfaction… …   Wikipedia

• Data integration — involves combining data residing in different sources and providing users with a unified view of these data.[1] This process becomes significant in a variety of situations, which include both commercial (when two similar companies need to merge… …   Wikipedia

• Constraint satisfaction problem — Constraint satisfaction problems (CSP)s are mathematical problems defined as a set of objects whose state must satisfy a number of constraints or limitations. CSPs represent the entities in a problem as a homogeneous collection of finite… …   Wikipedia

• Georg Gottlob — Infobox Scientist name = Georg Gottlob image width = caption = birth date = Birth date and age|1956|6|30|mf=y birth place = Vienna, Austria death date = death place = residence = Oxford, United Kingdom citizenship = nationality = Austrian… …   Wikipedia

• ADO.NET Entity Framework — is an object relational mapping (ORM) framework for the .NET Framework. This framework is Microsoft s first ORM offering for the .NET Framework. While Microsoft provided objects to manage the Object relational impedance mismatch (such as a… …   Wikipedia

• Ronald Reagan — Reagan redirects here. For other uses, see Reagan (disambiguation). Ronald Reagan 40th President of the United States In office …   Wikipedia

• Fusion power — The Sun is a natural fusion reactor. Fusion power is the power generated by nuclear fusion processes. In fusion reactions two light atomic nuclei fuse together to form a heavier nucleus (in contrast with fission power). In doing so they release a …   Wikipedia

• Bush Doctrine — The Bush Doctrine is a phrase used to describe various related foreign policy principles of United States president George W. Bush, created in the wake of the September 11, 2001 attacks. The phrase initially described the policy that the United… …   Wikipedia

• Hillary Rodham Clinton — 67th United …   Wikipedia

• Jack F. Matlock, Jr. — Jack F. Matlock, Jr. United States Ambassador to Czechoslovakia In office September 28, 1981 – September 20, 1983 President Ronald Reagan …   Wikipedia