Indexes can be unique or nonunique. Unique indexes guarantee that no two rows of a table have duplicate values in the key column or columns. For example, no two employees can have the same employee ID. Thus, in a unique index, one rowid exists for each data value. The data in the leaf blocks is sorted only by key.
Energy exists in many different forms. Examples of these are: light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear or atomic energy and so on. These forms of energy can be transferred and transformed between one another.
More than three types of energy exist, but a few examples of energy types include mechanical, heat and electrical energy. These describe the energy of motion that does work, the energy of being... More than three types of energy exist, but a few examples of energy types include mechanical, heat and electrical energy. These describe the energy of motion that does work, the energy of being... Star Gazing