Derby Database Tutorial for Beginners11

Apache Derby is an open-source relational database management system (RDBMS) from the Apache Software Foundation. It is designed to be lightweight, embeddable, and easy to use, making it a popular choice for small and medium-sized applications.

In this tutorial, we will provide a step-by-step guide to getting started with Derby for beginners. We will cover the basics of Derby, including installation, database creation, data manipulation, and querying.

Installation

You can install Derby by downloading the Apache Derby binary distribution from the Apache website. Once you have downloaded the distribution, extract the contents to a desired location on your computer. You can then add the Derby JAR files to your application's classpath.

Database Creation

To create a new database in Derby, you can use the following command:```
create database ;
```

For example, to create a database named "testdb", you would use the following command:```
create database testdb;
```

Table Creation

To create a new table in Derby, you can use the following command:```
create table ( );
```

For example, to create a table named "users" with columns "id" (integer), "name" (string), and "age" (integer), you would use the following command:```
create table users (id int, name varchar(255), age int);
```

Data Insertion

To insert data into a Derby table, you can use the following command:```
insert into (, ...) values (, ...);
```

For example, to insert a new row into the "users" table, you would use the following command:```
insert into users (id, name, age) values (1, 'John Doe', 30);
```

Data Retrieval

To retrieve data from a Derby table, you can use the following command:```
select , ... from where ;
```

For example, to retrieve all rows from the "users" table, you would use the following command:```
select id, name, age from users;
```

Conclusion

In this tutorial, we have provided a basic introduction to Derby for beginners. We have covered the basics of Derby, including installation, database creation, data manipulation, and querying. For more information about Derby, please refer to the official Derby documentation.

2024-11-29

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