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.
A brick wall. A wall is a structure that defines an area, carries a load, or provides shelter or security. There are many kinds of walls: Defensive walls in fortification. Walls in buildings that form a fundamental part of the superstructure or separate interior sections, sometimes for fire safety. Retaining walls, which hold back dirt, stone, water,or noise sound. Walls that protect from oceans (seawalls or rivers levees) Permanent, solid fences.