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Roles in Information Security Management

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What is the purpose of the `ROUND()` function in SQL?

To calculate the average of a column
To perform an inner join between two tables
To round a numeric value to a specified number of decimal places (correct)
To count the number of distinct values in a column

Which aggregate function returns the number of unique values in a column?

`COUNT(column)`
`SUM(column)`
`COUNT(DISTINCT column)` (correct)
`AVG(column)`

What is the purpose of the `GROUP BY` clause in SQL?

To calculate the average of a column
To perform an inner join between two tables
To return a single value for each value in the specified column(s) (correct)
To round a numeric value to a specified number of decimal places

Which SQL clause is used to filter the results of a `GROUP BY` statement based on an aggregate function?

<code>HAVING</code> (B) Signup and view all the answers

What is the purpose of a `JOIN` in SQL?

To combine data from two or more tables based on a related column (C) Signup and view all the answers

Which type of join returns all rows from both tables, regardless of whether there is a match in the other table?

Full outer join (D) Signup and view all the answers

What is the purpose of the `ON` clause in a `JOIN` statement?

To specify the condition for matching rows between the joined tables (B) Signup and view all the answers

How do you reference a column from a specific table when working with multiple tables in a query?

Use the table name followed by a period and the column name (A) Signup and view all the answers

What is the difference between a primary key and a foreign key in a database?

A primary key is a column that uniquely identifies each row in a table, while a foreign key is a column that refers to a primary key in another table (A) Signup and view all the answers

Which aggregate function calculates the sum of values in a column?

<code>SUM(column)</code> (C) Signup and view all the answers

Roles in Information Security Management

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Questions and Answers

What is the purpose of the `ROUND()` function in SQL?

Which aggregate function returns the number of unique values in a column?

What is the purpose of the `GROUP BY` clause in SQL?

Which SQL clause is used to filter the results of a `GROUP BY` statement based on an aggregate function?

What is the purpose of a `JOIN` in SQL?

Which type of join returns all rows from both tables, regardless of whether there is a match in the other table?

What is the purpose of the `ON` clause in a `JOIN` statement?

How do you reference a column from a specific table when working with multiple tables in a query?

What is the difference between a primary key and a foreign key in a database?

Which aggregate function calculates the sum of values in a column?

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Roles in Information Security Management

Choose a study mode

Podcast

Questions and Answers

What is the purpose of the ROUND() function in SQL?

Which aggregate function returns the number of unique values in a column?

What is the purpose of the GROUP BY clause in SQL?

Which SQL clause is used to filter the results of a GROUP BY statement based on an aggregate function?

What is the purpose of a JOIN in SQL?

Which type of join returns all rows from both tables, regardless of whether there is a match in the other table?

What is the purpose of the ON clause in a JOIN statement?

How do you reference a column from a specific table when working with multiple tables in a query?

What is the difference between a primary key and a foreign key in a database?

Which aggregate function calculates the sum of values in a column?

More Like This

Reporting Security Incidents

Chief Information Security Officer Roles: Implementing Technical Contr...

Information Security Management Quiz

ISMS Quiz: Information Security Management System Test

What is the purpose of the `ROUND()` function in SQL?

What is the purpose of the `GROUP BY` clause in SQL?

Which SQL clause is used to filter the results of a `GROUP BY` statement based on an aggregate function?

What is the purpose of a `JOIN` in SQL?

What is the purpose of the `ON` clause in a `JOIN` statement?