It’s important to know how things worked before, so then if we know how they work, we could change it or leave it the way it is. Sometimes what worked back then doesn’t work now.
Answer: If they are not complementary, then the light passes through the object or gets reflected.
Explanation:
The entity integrity rule states that a primary key attribute can be null. Thus the statement is false.
<h3>What is an entity?</h3>
An entity is refer to any object that exists in reality. These entities are Independent in nature. Each row in a table should be a distinct entity, which is ensured by entity integrity.
The entity integrity rule states that a primary key attribute can not be null as it shows unique characteristics of an entity.No primary key value can be null according to the entity integrity constraint because it is needed to identify specific attribute values in relation.
Therefore, the statement is False.
learn more about entity integrity, here:
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Answer:
sorry if wrong
Explanation:
b)a and b are true, c is false
sorry if wrong
Hi my name is Kaylee and im 14 in class 8 also
