Microsoft SQL Server Development for Everyone - Running Queries on Related Tables (Inner Join)
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Information Technology (IT), Architecture
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University
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Practice Problem
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Hard
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10 questions
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1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the primary reason for selecting the correct database before running queries?
To ensure the correct data is queried
To avoid syntax errors
To ensure data integrity
To prevent data loss
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main purpose of using a JOIN in SQL?
To update data in a table
To combine data from multiple tables
To delete data from tables
To create new tables
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Which type of JOIN is used to retrieve data that has matching values in both tables?
LEFT JOIN
FULL JOIN
INNER JOIN
RIGHT JOIN
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
When performing an INNER JOIN, what is typically used to match rows between tables?
Primary keys
Unique constraints
Foreign keys
Common columns
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is it beneficial to use aliases in SQL queries?
To increase database security
To reduce data redundancy
To make queries more readable
To shorten query execution time
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the advantage of selecting specific columns in a query?
It simplifies the database schema
It speeds up the query execution
It increases the accuracy of the query
It reduces the amount of data returned
7.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of using a WHERE clause in SQL?
To join tables
To group the results
To filter the results
To sort the results
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