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.
Aloba Arch is one of the most magnificent natural arches in the world, located in the Ennedi Range of the Sahara Desert in Chad. This is not a natural bridge, but a very large alcove arch. Aloba Arch has a span of approximately 250 feet, but perhaps more striking than the span, is the sheer height of the arch.