Introduction to MySQL Create Table and Multiple-Choice Questions

PROGRAMMING

3/19/20242 min read

MacBook Pro with images of computer language codes
MacBook Pro with images of computer language codes

Introduction to MySQL Create Table

MySQL is a popular open-source relational database management system that allows users to store, organize, and manage their data efficiently. One of the fundamental operations in MySQL is creating tables to store data in a structured manner. In this blog post, we will explore ten multiple-choice questions related to creating tables in MySQL, along with their explanations.

Question 1:

What is the syntax to create a table in MySQL?

  1. CREATE TABLE table_name;
  2. CREATE TABLE table_name ()
  3. CREATE TABLE table_name {}
  4. CREATE TABLE table_name []

Answer: Option 2 is correct. The syntax to create a table in MySQL is "CREATE TABLE table_name ()". The parentheses are used to define the columns and their data types.

Question 2:

Which keyword is used to specify the primary key in a table?

  1. PRIMARY KEY
  2. KEY
  3. INDEX
  4. UNIQUE

Answer: Option 1 is correct. The PRIMARY KEY keyword is used to specify the primary key in a table. The primary key uniquely identifies each record in the table.

Question 3:

Which data type is used to store a whole number in MySQL?

  1. INT
  2. CHAR
  3. VARCHAR
  4. DECIMAL

Answer: Option 1 is correct. The INT data type is used to store a whole number in MySQL. It can hold values from -2147483648 to 2147483647.

Question 4:

Which data type is used to store a string of variable length in MySQL?

  1. CHAR
  2. VARCHAR
  3. TEXT
  4. ENUM

Answer: Option 2 is correct. The VARCHAR data type is used to store a string of variable length in MySQL. It can hold up to 65,535 characters.

Question 5:

Which keyword is used to specify a foreign key constraint in MySQL?

  1. FOREIGN KEY
  2. KEY
  3. INDEX
  4. REFERENCES

Answer: Option 4 is correct. The REFERENCES keyword is used to specify a foreign key constraint in MySQL. It establishes a link between two tables based on a common column.

Question 6:

Which data type is used to store a date in MySQL?

  1. DATE
  2. TIME
  3. DATETIME
  4. TIMESTAMP

Answer: Option 1 is correct. The DATE data type is used to store a date in MySQL. It can hold values in the format 'YYYY-MM-DD'.

Question 7:

Which keyword is used to specify a default value for a column in MySQL?

  1. DEFAULT
  2. NULL
  3. NOT NULL
  4. UNIQUE

Answer: Option 1 is correct. The DEFAULT keyword is used to specify a default value for a column in MySQL. If no value is provided for the column during insertion, the default value will be used.

Question 8:

Which data type is used to store a decimal number in MySQL?

  1. INT
  2. CHAR
  3. VARCHAR
  4. DECIMAL

Answer: Option 4 is correct. The DECIMAL data type is used to store a decimal number in MySQL. It can hold numbers with decimal places.

Question 9:

Which keyword is used to specify a unique constraint in MySQL?

  1. PRIMARY KEY
  2. KEY
  3. INDEX
  4. UNIQUE

Answer: Option 4 is correct. The UNIQUE keyword is used to specify a unique constraint in MySQL. It ensures that each value in the column is unique.

Question 10:

Which keyword is used to drop a table in MySQL?

  1. DROP TABLE
  2. DELETE TABLE
  3. REMOVE TABLE
  4. TRUNCATE TABLE

Answer: Option 1 is correct. The DROP TABLE keyword is used to drop a table in MySQL. It permanently removes the table and its data from the database.

These ten multiple-choice questions covered the basics of creating tables in MySQL. By understanding these concepts, you will be able to create and manage tables effectively in your MySQL databases.

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