D427 Data Management Applications - Set 4 - Part 3

Test your knowledge of technical writing concepts with these practice questions. Each question includes detailed explanations to help you understand the correct answers.

Question 41: Which SQL function is used to return the current time?

CURRENT_TIME()

NOW()

TIME()

GETDATE()

Question 42: How do you combine the results of two SQL queries into one result set?

UNION

JOIN

MERGE

COMBINE

Question 43: What does the SQL keyword ASC do?

Sorts rows in ascending order

Filters rows based on a condition

Combines the results of two queries

Removes duplicates from the result set

Question 44: Which SQL clause is used to specify a condition for combining two tables?

JOIN

WHERE

AND

Question 45: Which SQL function is used to return the current date and time?

NOW()

TODAY()

GETDATE()

CURDATE()

Question 46: What does the SQL clause LIMIT do?

Limits the number of rows returned by a query

Filters rows based on a condition

Sorts rows in ascending or descending order

Combines the results of two queries

Question 47: How do you modify the data type of an existing column in SQL?

ALTER TABLE MODIFY COLUMN

CHANGE COLUMN TYPE

MODIFY COLUMN TYPE

ALTER COLUMN

Question 48: Which SQL clause is used to group rows that have the same values into summary rows?

GROUP BY

HAVING

ORDER BY

FILTER BY

Question 49: How do you rename a column in SQL?

ALTER TABLE RENAME COLUMN

MODIFY COLUMN NAME

CHANGE COLUMN

RENAME COLUMN

Question 50: What is the purpose of the SQL clause WHERE?

It filters rows based on a specified condition

It groups rows that have the same values

It combines the results of two queries

It returns the current system date and time

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