MySQL is an open-source relational database management system (RDBMS) that has been a cornerstone of web applications and data-driven solutions for over two decades. Developed by Oracle, MySQL offers a robust and efficient platform for storing, managing, and retrieving structured data. Its features include support for SQL, high performance, scalability, and extensive community support. MySQL is widely used for web development, e-commerce, content management systems, and more, making it a versatile and trusted database solution for organizations of all sizes, from startups to large enterprises.
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Practice Test
31. Which SQL statement is used to create a new MySQL database?
A. CREATE DATABASE
B. NEW DATABASE
C. ADD DATABASE
D. INSERT DATABASE
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Answer: CREATE DATABASE
32. What is the purpose of the DROP DATABASE statement in MySQL?
A. To delete a database
B. To update database records
C. To rename a database
D. To create a database
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Answer: To delete a database
33. What is the SQL command for renaming an existing database in MySQL?
A. RENAME DATABASE
B. ALTER DATABASE RENAME TO
C. RENAME TO DATABASE
D. UPDATE DATABASE NAME TO
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Answer: ALTER DATABASE RENAME TO
34. Which command is used to show a list of all available databases in MySQL?
A. SHOW DATABASES
B. LIST DATABASES
C. DISPLAY DATABASES
D. DESCRIBE DATABASES
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Answer: SHOW DATABASES
35. How do you delete a database in MySQL?
A. DELETE DATABASE
B. DROP DATABASE
C. REMOVE DATABASE
D. ERASE DATABASE
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Answer: DROP DATABASE
36. Which SQL statement is used to change the default database in MySQL?
A. ALTER DATABASE
B. SWITCH DATABASE
C. SET DATABASE
D. USE DATABASE
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Answer: USE DATABASE
37. What is the purpose of the COLLATE clause when creating a database?
A. To set the database name
B. To define the character set
C. To specify the owner
D. To set the storage engine
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Answer: To define the character set
38. What is the significance of the utf8mb4 character set in MySQL databases?
A. It supports 4-byte Unicode characters
B. It is used for numeric data
C. It stores binary data
D. It is specific to MySQL 4.x versions
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Answer: It supports 4-byte Unicode characters
39. What happens if you attempt to create a database with a name that already exists in MySQL?
A. An error is generated
B. The existing database is overwritten
C. The new database is created
D. The name is automatically changed
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Answer: An error is generated
40. What is the primary function of the INFORMATION_SCHEMA database in MySQL?
A. Storing user data
B. Storing system metadata
C. Managing user privileges
D. Running queries on user data
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Answer: Storing system metadata
