From Wikipedia, the free encyclopedia. A data mart is the access layer of the data warehouse environment that is used to get data out to the users. The data mart is a subset of the data warehouse and is usually oriented to a specific business line or team. Whereas data warehouses have an enterprise-wide depth, the information in data marts pertains to a single department.
Most species of slugs are generalists, feeding on a broad spectrum of organic materials, including leaves from living plants, lichens, mushrooms, and even carrion. Some slugs are predators and eat other slugs and snails, or earthworms.
Sea-living slugs eat jellyfish, only to collect their nettle cells and to use them for their own defence. Angel-like translucent snails swim through the sea and eat other snails, which catch their plankton prey with a net. Themselves they are eaten by fish and whales and so are an important link in the ocean's food chain. There is a marine predator slug which eats other snails without a tooth in its mouth. There are 43,000 gastropod species on our earth today, measuring between a millimetre and 75 centimetres. Snails not only live on land, but also in freshwater and in the sea.