1 FROM: specifies the tables that you want to query data from. 2  You can also use the FROM clause to join multiple tables. 3  WHERE: filters unwanted records or rows in the result. 4  GROUP BY: groups rows by common column values. 5  HAVING: uses with the GROUP BY clause to filter unwanted groups.
Natural Bridge (Virginia) For the nearby unincorporated community of the same name, see Natural Bridge, Virginia. Natural Bridge is a geological formation in Rockbridge County, Virginia, comprising a 215-foot-high (66 m) natural arch with a span of 90 feet (27 m). It is situated within a gorge carved from the surrounding mountainous limestone terrain by Cedar Creek, a small tributary of the James River.
The choice between bridge and arch is somewhat arbitrary. The Natural Arch and Bridge Society identifies a bridge as a subtype of arch that is primarily water-formed. By contrast, the Dictionary of Geological Terms defines a natural bridge as a natural arch that spans a valley of erosion..