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+# Database
+
+Database Abstraction Layer
+
+## Requirements
+
++ PHP 8+
++ PDO
+
+### Recommended
+
++ [`php-di/php-di`](https://packagist.org/packages/php-di/php-di)
+
+## Installation
+
+`composer.json`
+```
+{
+    ...
+    "repositories": [
+        ...
+        {
+            "type": "git",
+            "path": "https://git.provm.cl/ProVM/database.git"
+        }
+        ...
+    ],
+    ...
+    "require": {
+        ...
+        "provm/database": "^2.0"
+        ...
+    },
+    ...
+}
+```
+
+## Usage
+
+For `MySQL`/`MariaDB`
+
+Without `DI`
+```
+$database new MySQL();
+$database->setHost(<host>);
+$database->setPort(<port>); // If diferent from 3306
+$database->setUsername(<username>);
+$database->setPassword(<password>);
+
+$connection = new Connection($database);
+```
+With `DI`
+```
+$container->set(ProVM\Concept\Database::class, function(Psr\Container\ContainerInterface $container) {
+    $database = $container->get(ProVM\Database\MySQL::class);
+    $database->setHost(<host>);
+    $database->setPort(<port>); // If diferent from 3306
+    $database->setUsername(<username>);
+    $database->setPassword(<password>);
+    return $database;
+});
+$container->set(ProVM\Concept\Database\Connection::class, function(Psr\Container\ContainerInterface $container) {
+    return new ProVM\Database\Connection($container->get(ProVM\Concept\Database::class);
+});
+```
+
+Run query
+```
+$rs = $connection->query(<query>);
+```
+Run prepared statement
+```
+$rs = $connection->prepare(<query>)->execute(<value>);
+or
+$rs = $connection->execute(<query>, <values>);
+```
+Get data from ResultSet
+```
+$data = $rs->getAsArray();
+$data_objs = $rs->getAsObject();
+```
+
+## Definitions
+
+### Database
+Database configuration
++ `Database::host` Connection host name [`string`]
++ `Database::port` Connection port number [`int`]
++ `Database::name` Database name to connect [`string`]
++ `Database::username` Optional. The username to connect [`string`]
++ `Database::password` Optional. The password for the username [`string`]
++ `Database->getDsn()` get dsn string for PDO connection. [`string`]
++ `Database->needsUser()` If a user is needed for the connection.
+
+### Connection
+Connection handling
++ `Connection::query` Query the database
++ `Connection::prepare` Prepare query statement
++ `Connection::execute` Prepare and execute a query statement
++ `Conneciton::transaction` Return a transaction
+
+### Transaction
+Transaction
++ `Transaction::begin` Begin transaction
++ `Transaction::commit` Commit changes
++ `Transaction::rollBack` Roll back changes
++ `Transaction::query` Same as `Connection::query`
++ `Transaction::prepare` Same as `Connection::prepare`
++ `Transaction::execute` Same as `Connection::execute`
+
+### ResultSet
+Result set to handle PDOStatement
++ `ResultSet::execute` Execute a prepared statement
++ `ResultSet::getAsArray` Return query results as array of associative arrays
++ `ResultSet::getAsObject` Return query results as array of objects
++ `ResultSet::getFirst` Return first result as object
+
+## TODO
++ Implement other database types. eg: PostgreSQL, SQLite