# With which of the four types of constraints in Exercise 4 is a requirement that an attribute not contain

QUESTION:

With which of the four types of constraints in Exercise 4 is a requirement that an attribute did not contain a null value associated?

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## With which of the four types of constraints in Exercise 4 is a requirement that an attribute not contain a null value associated?

QUESTION: With which of the four types of constraints in Exercise 4 is a requirement that an attribute did not contain a null value associated?

## Which comparison operators can be used when searching for null values? Which comparison operators cannot be used when searching for null values?

QUESTION: Which comparison operators can be used when searching for null values? Which comparison operators cannot be used when searching for null values? What is…

## Which comparison operators can be used when searching for null values? Which comparison operators

QUESTION: Which comparison operators can be used when searching for null values? Which comparison operators cannot be used when searching for null values? What is…

## What is the result of an attempt to add, subtract, multiply, or divide two number fields, one of which contains a null value?

QUESTION: What is the result of an attempt to add, subtract, multiply, or divide two number fields, one of which contains a null value?

## What is the difference between a key attribute and a non-key attribute?

QUESTION: “What is the difference between a key attribute and a non-key attribute”?

## What is the result of an attempt to add, subtract, multiply, or divide two number fields, one of which

QUESTION: What is the result of an attempt to add, subtract, multiply, or divide two number fields, one of which contains a null value?

## What is the difference between a character field that contains a null value and a character field that contains a single blank space?

QUESTION: What is the difference between a character field that contains a null value and a character field that contains a single blank space?

## What is the difference between a character field that contains a null value and a character field that

QUESTION: What is the difference between a character field that contains a null value and a character field that contains a single blank space?

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