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Topics

Introduction to SQL

What is SQL?SQL History SQL Standards SQL vs NoSQL SQL Database Management Systems

SQL Basics

SQL Syntax SQL Comments SQL Data Types SQL Operators SQL Expressions SQL Literals SQL Identifiers SQL Keywords SQL Case Sensitivity

SQL Database Fundamentals

Database Concepts Tables and Fields Primary Keys Foreign Keys Indexes Constraints Normalization Denormalization SQL Schema Design

SQL Data Manipulation

SQL SELECT Statement SQL INSERT Statement SQL UPDATE Statement SQL DELETE Statement SQL MERGE Statement SQL Aliases SQL Wildcards SQL LIKE Operator SQL IN Operator SQL BETWEEN Operator SQL NULL Values SQL ORDER BY Clause SQL LIMIT Clause SQL OFFSET Clause

SQL Filtering and Sorting

SQL WHERE Clause SQL AND, OR, NOT Operators SQL GROUP BY Clause SQL HAVING Clause SQL DISTINCT Keyword SQL TOP Clause

SQL Joins

SQL INNER JOIN SQL LEFT JOIN SQL RIGHT JOIN SQL FULL OUTER JOIN SQL CROSS JOIN SQL Self JOIN SQL Natural JOIN SQL Multiple JOINs

SQL Functions

SQL Aggregate Functions SQL Scalar Functions SQL String Functions SQL Numeric Functions SQL Date Functions SQL Conversion Functions SQL System Functions SQL User-Defined Functions

SQL Subqueries

SQL Subquery Basics Correlated Subqueries Nested Subqueries SQL EXISTS Operator SQL ANY and ALL Operators Subqueries in SELECT Subqueries in FROM Subqueries in WHERE

SQL Views

Creating SQL Views Altering SQL Views Dropping SQL Views Updatable Views Materialized Views View Limitations

SQL Transactions

SQL Transaction Basics ACID Properties BEGIN TRANSACTION COMMIT ROLLBACK SAVEPOINT Transaction Isolation Levels

SQL Data Definition

SQL CREATE TABLE SQL ALTER TABLE SQL DROP TABLE SQL TRUNCATE TABLE SQL CREATE INDEX SQL DROP INDEX SQL CREATE DATABASE SQL ALTER DATABASE SQL DROP DATABASE

SQL Data Control

SQL GRANT SQL REVOKE SQL Roles SQL Users SQL Privileges

SQL Performance Optimization

SQL Query Optimization SQL Execution Plans SQL Index Optimization SQL Query Tuning SQL Caching SQL Partitioning

Advanced SQL Concepts

SQL Stored Procedures SQL Triggers SQL Cursors SQL Common Table Expressions SQL Window Functions SQL Pivot and Unpivot SQL JSON Operations SQL XML Operations SQL Full-Text Search

SQL Best Practices

SQL Naming Conventions SQL Code Organization SQL Error Handling SQL Security Best Practices SQL Backup and Recovery SQL Version Control

SQL ALTER DATABASE

The SQL ALTER DATABASE statement is a powerful tool for modifying existing database properties. It allows database administrators to change various attributes of a database without recreating it from scratch.

Syntax

The basic syntax for ALTER DATABASE varies slightly depending on the database management system, but generally follows this structure:

ALTER DATABASE database_name
MODIFY NAME = new_database_name;

Common Use Cases

Here are some typical scenarios where you might use ALTER DATABASE:

Renaming a database
Changing database file locations
Modifying database options (e.g., recovery model, compatibility level)
Adding or removing database files

Examples

1. Renaming a Database

ALTER DATABASE old_database_name
MODIFY NAME = new_database_name;

2. Changing Database Recovery Model

ALTER DATABASE database_name
SET RECOVERY FULL;

Best Practices

Always backup your database before making alterations
Use caution when modifying production databases
Test changes in a non-production environment first
Ensure you have the necessary permissions to alter the database

Considerations

When using ALTER DATABASE, keep in mind:

Some alterations may require exclusive access to the database
Certain changes might affect database performance or behavior
Not all properties can be modified for all database systems

Understanding the SQL ALTER DATABASE statement is crucial for effective database management. It's a key part of maintaining and optimizing your SQL database management systems.

Related Concepts

To further enhance your SQL database management skills, explore these related topics: