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9 Questions

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Test Your SQL Skills

Created by

@ScenicMonkey

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Questions and Answers

What does the keyword DISTINCT do in SQL?

It selects all rows from a table

It sorts the data in ascending order

It allows us to remove duplicates from the results (correct)

It retrieves only certain columns of a table

What does the DISTINCT keyword do in SQL?

It sorts the results in ascending order

It retrieves all columns from a table

It removes duplicates from the results (correct)

It retrieves only certain columns from a table

What is the concatenation operator in Oracle?

|| (correct)

What is the maximum number of columns that can be sorted using the ORDER BY clause?

255 Signup and view all the answers

What is the maximum number of columns that can be sorted using the ORDER BY clause?

255 Signup and view all the answers

What is the purpose of using a column alias in Oracle?

To give a new name to a column Signup and view all the answers

How do you retrieve only certain columns from a table in SQL?

Separate the column names with commas Signup and view all the answers

What is the order of mathematical operations in Oracle?

Multiplication and division, addition and subtraction Signup and view all the answers

What is an example of an Ordinal Sort in SQL?

Sorting by the position in the results as the sort criteria Signup and view all the answers

Study Notes

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Description

"Mastering SQL: Selecting and Retrieving Data from Tables" - Test your knowledge on how to use SQL to select and retrieve data from tables. Learn how to use wildcards, select specific columns, and filter data using conditions. This quiz will test your understanding of SQL syntax and help you improve your data querying skills. Perfect for SQL beginners and intermediate learners.