A tuple is a fixed fixed-length list containing elements that need not have the same type. It can be, and often is, used as a key-value pair. A row (sometimes called a record) is the set of fields within a table that are relevant to a specific entity.
The stem wall on a concrete foundation is essentially the supporting wall that joins the foundation of a building to the vertical walls of the structure that is constructed atop the foundation.
stem noun [ C ] (CENTRAL PART) âº a central part of something from which other parts can develop or grow, or which forms a support. âº The stem of a plant is the straight part that grows above the ground and from which leaves and flowers grow. âº The stem of a glass is the narrow, vertical part that supports the container into which you put liquid.