D427 Data Management Applications - Set 2 - 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 find the maximum value in a column?

MAX()

GREATEST()

BIGGEST()

LARGE()

Question 42: Which SQL clause is used to group rows that have the same values?

GROUP BY

ORDER BY

HAVING

CLUSTER BY

Question 43: What SQL function is used to return the first non-NULL value from a set of arguments?

IFNULL()

COALESCE()

NULLIF()

NVL()

Question 44: Which SQL statement is used to delete a table from a database?

REMOVE TABLE

DELETE TABLE

DROP TABLE

ERASE TABLE

Question 45: What does the SQL TRUNCATE statement do?

It removes all rows from a table

It deletes a table

It removes all columns from a table

It reduces the table size

Question 46: Which SQL function is used to concatenate two strings?

CONCAT()

MERGE()

COMBINE()

JOIN()

Question 47: Which SQL operator is used to exclude rows that do not meet a condition?

FILTER

NOT

EXCEPT

OMIT

Question 48: How do you update a column value to NULL in a SQL table?

UPDATE Table SET Column = NULL

UPDATE Table SET Column = ''

UPDATE Table SET Column = 0

UPDATE Table SET Column = EMPTY

Question 49: Which SQL function is used to remove trailing spaces from a string?

TRIM()

RTRIM()

LTRIM()

STRIP()

Question 50: What SQL clause is used to restrict the number of rows returned in a query?

WHERE

LIMIT

TOP

DISTINCT

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