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.
Compound gases contain a combination of different atoms. Carbon monoxide (CO) is an example of a compound gas. The air we breathe here on Earth is made up of different gases. It contains around 78% nitrogen, 21% oxygen, 1% argon and a small amount of other gases.Natural gas contains mostly methane, it is used as a fuel to generate electricity and is common in the home where it can be used for heating, cooking and other purposes. Gas pressure is measured in pascals.t contains around 78% nitrogen, 21% oxygen, 1% argon and a small amount of other gases. Natural gas contains mostly methane, it is used as a fuel to generate electricity and is common in the home where it can be used for heating, cooking and other purposes.