Column - Name of the column in question. The above query shows all tables that have more than one index with the same leading column. These indexes can cause queries to use an inappropriate indexes; in other words, Oracle will use the index that was created most recently if two indexes are of equal ranking.
Some different types of gases are argon, carbon dioxide, hydrogen,  helium, oxygen, nitrogen, nitrous oxide, propane and propylene. Carbon dioxide is used for fermentation, â¦ and oxygen and nitrogen  are what makes up the Earth's atmosphere.1 person found this useful. Jan C.tmosphere contains roughly (by volume) 78.09% nitrogen, 20.95%oxygen, 0.93% argon, 0.039% carbon dioxide, and small amounts of other gases.
The main types of pollution gases in the air are carbon dioxide, carbon monoxide, methane, sulfur dioxide, chlorofluorocarbons (CFCs) and nitrogen oxides.ain types of pollution 2: Water Pollution. Water pollution is another one of the main types of pollution of the environment. Water pollution could be in the form of any change in the physical, chemical and biological properties of water which has a harmful effect on living things.