A partial dependency exists.
We have two types of dependency. The partial dependency and the transitive dependency.
The answer here is partial dependency. It occurs when the attribute only depends on some parts of the element. In such attribute, the primary key is the determinant.
It can be shown as;
XY→WZ , X→W and XY is the primary key or the only candidate key
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Manually cleaning data is done manually which makes it challenging. This make it prone to mistakes.
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"a hole is connected to the wire that brings the electricity back to the breaker box. when you turn on a lamp, the hot part of the outlet allows electricity to flow" I got this info from Google.com
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