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The UPDATE statement in SQL allows modification of existing records in a table. This quiz on SQL update will test your understanding of UPDATE syntax, conditional logic, multi-table updates, and common use cases.
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What does the UPDATE statement do in SQL?
Which clause is required to specify which rows should be updated?
What happens if you use UPDATE without a WHERE clause?
What does the SET clause in the UPDATE statement do?
Which of the following is a correct UPDATE statement?
Can you update multiple columns in one UPDATE statement?
What is the result of this query?
UPDATE employees SET salary = salary + 500 WHERE dept = ‘HR’;
Which clause is used in some databases to limit the number of rows updated?
What happens if you update a primary key to a duplicate value?
Which of the following statements is TRUE?
Which command allows you to preview the effect of an UPDATE before actually running it?
How do you update values using another table’s data?
What is the correct way to increment a numeric column by 1?
Which SQL statement rolls back changes made by an UPDATE?
What does the following query do?
UPDATE customers SET status = ‘inactive’ WHERE last_login < ‘2023-01-01’;
Understanding how to use UPDATE in SQL is essential for maintaining and modifying data effectively. These MCQs explore its correct usage, performance considerations, and real-world applications.
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