- A MySQL
- B MongoDB
- C PostgreSQL
- D Redis
Introduction to MySQL Databases - Quiz
- A CREATE TABLE
- B INSERT INTO
- C CREATE DATABASE
- D SELECT FROM
- A 80
- B 443
- C 3306
- D 8080
- A DESCRIBE
- B SHOW TABLES
- C SELECT TABLES
- D LIST TABLES
- A INT
- B VARCHAR
- C DATE
- D BOOLEAN
- A To specify the columns to retrieve
- B To sort the result set
- C To filter the rows based on conditions
- D To group the rows into subsets
- A To define a primary key for a table
- B To ensure data integrity
- C To optimize query performance
- D To enforce referential integrity
- A MODIFY
- B ALTER
- C UPDATE
- D CHANGE
- A To specify the columns to retrieve
- B To sort the result set
- C To filter the rows based on conditions
- D To filter the result set based on conditions
- A DELETE DATABASE
- B REMOVE DATABASE
- C DROP DATABASE
- D ERASE DATABASE
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Introduction to MySQL Databases - Quiz
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- A. MySQL
- B. MongoDB
- C. PostgreSQL
- D. Redis
Remarks:
Explanation:
MySQL is a popular open-source relational database management system (RDBMS) that is widely used for storing and managing structured data. It provides a scalable and reliable platform for applications that require a robust database backend.
- A. CREATE TABLE
- B. INSERT INTO
- C. CREATE DATABASE
- D. SELECT FROM
Remarks:
Explanation:
The CREATE DATABASE statement is used in MySQL to create a new database. It specifies the name of the database that you want to create and any additional options such as character set and collation.
- A. 80
- B. 443
- C. 3306
- D. 8080
Remarks:
Explanation:
The default port number for MySQL is 3306. It is the port where the MySQL server listens for incoming connections from clients.
- A. DESCRIBE
- B. SHOW TABLES
- C. SELECT TABLES
- D. LIST TABLES
Remarks:
Explanation:
The SHOW TABLES command is used in MySQL to display a list of all the tables in a database. It provides information about the tables such as their names and sizes.
- A. INT
- B. VARCHAR
- C. DATE
- D. BOOLEAN
Remarks:
Explanation:
The DATE data type in MySQL is used to store a date value without any time components. It allows you to store dates in the format 'YYYY-MM-DD'.
- A. To specify the columns to retrieve
- B. To sort the result set
- C. To filter the rows based on conditions
- D. To group the rows into subsets
Remarks:
Explanation:
The GROUP BY clause in a MySQL query is used to group the rows based on one or more columns. It allows you to perform aggregate functions, such as SUM or COUNT, on each group of rows.
- A. To define a primary key for a table
- B. To ensure data integrity
- C. To optimize query performance
- D. To enforce referential integrity
Remarks:
Explanation:
In MySQL, an INDEX is used to optimize the performance of queries by creating a data structure that allows for faster data retrieval. It helps in speeding up the search, sorting, and joining of tables.
- A. MODIFY
- B. ALTER
- C. UPDATE
- D. CHANGE
Remarks:
Explanation:
The UPDATE command is used in MySQL to modify existing records in a table. It allows you to specify the columns to be updated and the new values to be assigned.
- A. To specify the columns to retrieve
- B. To sort the result set
- C. To filter the rows based on conditions
- D. To filter the result set based on conditions
Remarks:
Explanation:
The HAVING clause in a MySQL query is used to filter the result set based on conditions that involve aggregate functions. It is similar to the WHERE clause but operates on the grouped rows rather than individual rows.
- A. DELETE DATABASE
- B. REMOVE DATABASE
- C. DROP DATABASE
- D. ERASE DATABASE
Remarks:
Explanation:
The DROP DATABASE command is used in MySQL to delete a database and all its associated tables, data, and objects. It permanently removes the database from the MySQL server.