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MySQL - Home
MySQL - Introduction
MySQL - Features
MySQL - Versions
MySQL - Variables
MySQL - Installation
MySQL - Administration
MySQL - PHP Syntax
MySQL - Node.js Syntax
MySQL - Java Syntax
MySQL - Python Syntax
MySQL - Connection
MySQL - Workbench

MySQL Databases
MySQL - Create Database
MySQL - Drop Database
MySQL - Select Database
MySQL - Show Database
MySQL - Copy Database
MySQL - Database Export
MySQL - Database Import
MySQL - Database Info

MySQL Users
MySQL - Create Users
MySQL - Drop Users
MySQL - Show Users
MySQL - Change Password
MySQL - Grant Privileges
MySQL - Show Privileges
MySQL - Revoke Privileges
MySQL - Lock User Account
MySQL - Unlock User Account

MySQL Tables
MySQL - Create Tables
MySQL - Show Tables
MySQL - Alter Tables
MySQL - Rename Tables
MySQL - Clone Tables
MySQL - Truncate Tables
MySQL - Temporary Tables
MySQL - Repair Tables
MySQL - Describe Tables
MySQL - Add/Delete Columns
MySQL - Show Columns
MySQL - Rename Columns
MySQL - Table Locking
MySQL - Drop Tables
MySQL - Derived Tables

MySQL Queries
MySQL - Queries
MySQL - Constraints
MySQL - Insert Query
MySQL - Select Query
MySQL - Update Query
MySQL - Delete Query
MySQL - Replace Query
MySQL - Insert Ignore
MySQL - Insert on Duplicate Key Update
MySQL - Insert Into Select

MySQL Views
MySQL - Create Views
MySQL - Update Views
MySQL - Drop Views
MySQL - Rename Views

MySQL Indexes
MySQL - Indexes
MySQL - Create Index
MySQL - Drop Index
MySQL - Show Indexes
MySQL - Unique Index
MySQL - Clustered Index
MySQL - Non-Clustered Index

MySQL Operators and Clauses
MySQL - Where Clause
MySQL - Limit Clause
MySQL - Distinct Clause
MySQL - Order By Clause
MySQL - Group By Clause
MySQL - Having Clause
MySQL - AND Operator
MySQL - OR Operator
MySQL - Like Operator
MySQL - IN Operator
MySQL - ANY Operator
MySQL - EXISTS Operator
MySQL - NOT Operator
MySQL - NOT EQUAL Operator
MySQL - IS NULL Operator
MySQL - IS NOT NULL Operator
MySQL - Between Operator
MySQL - UNION Operator
MySQL - UNION vs UNION ALL
MySQL - MINUS Operator
MySQL - INTERSECT Operator
MySQL - INTERVAL Operator

MySQL Joins
MySQL - Using Joins
MySQL - Inner Join
MySQL - Left Join
MySQL - Right Join
MySQL - Cross Join
MySQL - Full Join
MySQL - Self Join
MySQL - Delete Join
MySQL - Update Join
MySQL - Union vs Join

MySQL Keys
MySQL - Unique Key
MySQL - Primary Key
MySQL - Foreign Key
MySQL - Composite Key
MySQL - Alternate Key

MySQL Triggers
MySQL - Triggers
MySQL - Create Trigger
MySQL - Show Trigger
MySQL - Drop Trigger
MySQL - Before Insert Trigger
MySQL - After Insert Trigger
MySQL - Before Update Trigger
MySQL - After Update Trigger
MySQL - Before Delete Trigger
MySQL - After Delete Trigger

MySQL Data Types
MySQL - Data Types
MySQL - VARCHAR
MySQL - BOOLEAN
MySQL - ENUM
MySQL - DECIMAL
MySQL - INT
MySQL - FLOAT
MySQL - BIT
MySQL - TINYINT
MySQL - BLOB
MySQL - SET

MySQL Regular Expressions
MySQL - Regular Expressions
MySQL - RLIKE Operator
MySQL - NOT LIKE Operator
MySQL - NOT REGEXP Operator
MySQL - regexp_instr() Function
MySQL - regexp_like() Function
MySQL - regexp_replace() Function
MySQL - regexp_substr() Function

MySQL Fulltext Search
MySQL - Fulltext Search
MySQL - Natural Language Fulltext Search
MySQL - Boolean Fulltext Search
MySQL - Query Expansion Fulltext Search
MySQL - ngram Fulltext Parser

MySQL Functions & Operators
MySQL - Date and Time Functions
MySQL - Arithmetic Operators
MySQL - Numeric Functions
MySQL - String Functions
MySQL - Aggregate Functions

MySQL Useful Resources
MySQL - Useful Functions
MySQL - Statements Reference
MySQL - Quick Guide
MySQL - Useful Resources
MySQL - Discussion

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Quiz on MySQL Add/Delete Columns

1. What SQL command is used to add a new column to an existing table?

A. ALTER TABLE
B. UPDATE TABLE
C. INSERT INTO
D. ADD COLUMN

2. Which keyword is used to specify the data type of a new column when adding it?

A. DATA TYPE
B. AS
C. COLUMN TYPE
D. TYPE

3. What is the correct syntax to delete a column from a table?

A. REMOVE COLUMN column_name FROM table_name;
B. DELETE COLUMN column_name FROM table_name;
C. ALTER TABLE table_name DROP COLUMN column_name;
D. ALTER TABLE table_name REMOVE column_name;

4. Can you add multiple columns in a single ALTER TABLE statement?

A. Yes
B. No
C. Only if they are of the same data type
D. Only if they have default values

5. What happens to the data in a column when it is deleted?

A. It is archived
B. It is permanently lost
C. It can be restored
D. It is moved to another table

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