Become a Database Professional with SQL

Databases are universal–they underlie the technology we use every day. They're a crucial component of everything, from telecommunications systems, banking systems, and video games to just about any other software system that maintains some amount of persistent data.

In this module, we’ll learn about the fundamental concepts of databases, why and when they're used, what relational databases are, and entity-relationship diagrams. We will also be exposed to techniques like normalization that help to increase the efficiency of databases. We’ll wrap up with a look at the basics of SQL.

After completing this module, we will be able to move on to more advanced courses involving database systems and SQL.

Database Design Fundamentals for Software Engineers

## CREATE DATABASE

The SQL **CREATE DATABASE** statement is used to create a new SQL database.

### Syntax

The basic syntax of this `CREATE DATABASE` statement is as follows:

```sql 
CREATE DATABASE DatabaseName;
```


The database name should always be unique within the RDBMS.

Keep in mind that SQL keywords are NOT case sensitive: `create` is the same as `CREATE`.

Also, some database systems require a semicolon at the end of each SQL statement. A semicolon is the standard way to separate each SQL statement in database systems that allow more than one SQL statement to be executed in the same call to the server.

### Example

If you want to create a new database, for example, testDB1, then the `CREATE DATABASE` statement would be as shown below:

```sql
CREATE DATABASE testDB1;
```

Now let's create two databases in the code below: 

# CREATE DATABASE

The SQL **CREATE DATABASE** statement is used to create a new SQL database.

## Syntax

The basic syntax of this `CREATE DATABASE` statement is as follows:

```sql 
CREATE DATABASE DatabaseName;
```


The database name should always be unique within the RDBMS.

Keep in mind that SQL keywords are NOT case sensitive: `create` is the same as `CREATE`.

Also, some database systems require a semicolon at the end of each SQL statement. A semicolon is the standard way to separate each SQL statement in database systems that allow more than one SQL statement to be executed in the same call to the server.

## Example

If you want to create a new database, for example, testDB1, then the `CREATE DATABASE` statement would be as shown below:

```sql
CREATE DATABASE testDB1;
```

Now let's create two databases in the code below: 

In this lesson, we will look at the syntax for creating and deleting a database.

Introduction

Fundamental Concepts

Data Modeling

Entity-Relationship Data Model

The Relational Data Model

Functional Dependencies

Normalization

Structured Query Language

Conclusion

CREATE, DROP, and USE Databases

CREATE DATABASE

Syntax

Example