diff --git a/src/DatabaseManager.php b/src/DatabaseManager.php
index 034e753e..fe931d69 100644
--- a/src/DatabaseManager.php
+++ b/src/DatabaseManager.php
@@ -161,7 +161,7 @@ public function driver(string $driver): DriverInterface
 
         if ($driverObject instanceof LoggerAwareInterface) {
             $logger = $this->getLoggerForDriver($driverObject);
-            if (! $logger instanceof NullLogger) {
+            if (!$logger instanceof NullLogger) {
                 $driverObject->setLogger($logger);
             }
         }
@@ -200,7 +200,7 @@ private function makeDatabase(DatabasePartial $database): Database
 
     private function getLoggerForDriver(DriverInterface $driver): LoggerInterface
     {
-        if (! $this->loggerFactory) {
+        if (!$this->loggerFactory) {
             return $this->logger ??= new NullLogger();
         }
 
diff --git a/src/Driver/Jsoner.php b/src/Driver/Jsoner.php
index 8211e4b4..4c4a07e2 100644
--- a/src/Driver/Jsoner.php
+++ b/src/Driver/Jsoner.php
@@ -27,7 +27,7 @@ final class Jsoner
     public static function toJson(mixed $value, bool $encode = true, bool $validate = true): string
     {
         if ($encode) {
-            return \json_encode($value, \JSON_UNESCAPED_UNICODE|\JSON_THROW_ON_ERROR);
+            return \json_encode($value, \JSON_UNESCAPED_UNICODE | \JSON_THROW_ON_ERROR);
         }
 
         $result = (string)$value;
diff --git a/src/Driver/MySQL/Schema/MySQLColumn.php b/src/Driver/MySQL/Schema/MySQLColumn.php
index da74d081..4bae5085 100644
--- a/src/Driver/MySQL/Schema/MySQLColumn.php
+++ b/src/Driver/MySQL/Schema/MySQLColumn.php
@@ -78,7 +78,7 @@ class MySQLColumn extends AbstractColumn
         //bigInteger
         'integer'     => ['type' => 'int', 'size' => 11, 'unsigned' => false, 'zerofill' => false],
         'tinyInteger' => ['type' => 'tinyint', 'size' => 4, 'unsigned' => false, 'zerofill' => false],
-        'smallInteger'=> ['type' => 'smallint', 'size' => 6, 'unsigned' => false, 'zerofill' => false],
+        'smallInteger' => ['type' => 'smallint', 'size' => 6, 'unsigned' => false, 'zerofill' => false],
         'bigInteger'  => ['type' => 'bigint', 'size' => 20, 'unsigned' => false, 'zerofill' => false],
 
         //String with specified length (mapped via method)
@@ -121,7 +121,7 @@ class MySQLColumn extends AbstractColumn
         'boolean'     => ['bool', 'boolean', ['type' => 'tinyint', 'size' => 1]],
         'integer'     => ['int', 'integer', 'mediumint'],
         'tinyInteger' => ['tinyint'],
-        'smallInteger'=> ['smallint'],
+        'smallInteger' => ['smallint'],
         'bigInteger'  => ['bigint'],
         'string'      => ['varchar', 'char'],
         'text'        => ['text', 'mediumtext'],
diff --git a/src/Driver/SQLServer/SQLServerDriver.php b/src/Driver/SQLServer/SQLServerDriver.php
index 2f785fdb..88a99726 100644
--- a/src/Driver/SQLServer/SQLServerDriver.php
+++ b/src/Driver/SQLServer/SQLServerDriver.php
@@ -57,7 +57,7 @@ protected function bindParameters(
                 $index++;
             }
 
-            $type = \PDO::PARAM_STR;
+            $type = PDO::PARAM_STR;
 
             if ($parameter instanceof ParameterInterface) {
                 $type = $parameter->getType();
@@ -74,14 +74,14 @@ protected function bindParameters(
                 $parameter = $this->formatDatetime($parameter);
             }
 
-            if ($type === \PDO::PARAM_LOB) {
+            if ($type === PDO::PARAM_LOB) {
                 /** @psalm-suppress UndefinedConstant */
                 $statement->bindParam(
                     $index,
                     $parameter,
                     $type,
                     0,
-                    \PDO::SQLSRV_ENCODING_BINARY
+                    PDO::SQLSRV_ENCODING_BINARY
                 );
 
                 unset($parameter);
@@ -181,7 +181,7 @@ public static function create(DriverConfig $config): static
             )
         );
 
-        if ((int) $driver->getPDO()->getAttribute(\PDO::ATTR_SERVER_VERSION) < 12) {
+        if ((int) $driver->getPDO()->getAttribute(PDO::ATTR_SERVER_VERSION) < 12) {
             throw new DriverException('SQLServer driver supports only 12+ version of SQLServer');
         }
 
diff --git a/src/Driver/SQLServer/Schema/SQLServerColumn.php b/src/Driver/SQLServer/Schema/SQLServerColumn.php
index ed8fd589..10339b4b 100644
--- a/src/Driver/SQLServer/Schema/SQLServerColumn.php
+++ b/src/Driver/SQLServer/Schema/SQLServerColumn.php
@@ -65,7 +65,7 @@ class SQLServerColumn extends AbstractColumn
         //bigInteger
         'integer'     => 'int',
         'tinyInteger' => 'tinyint',
-        'smallInteger'=> 'smallint',
+        'smallInteger' => 'smallint',
         'bigInteger'  => 'bigint',
 
         //String with specified length (mapped via method)
@@ -107,7 +107,7 @@ class SQLServerColumn extends AbstractColumn
         'boolean'     => ['bit'],
         'integer'     => ['int'],
         'tinyInteger' => ['tinyint'],
-        'smallInteger'=> ['smallint'],
+        'smallInteger' => ['smallint'],
         'bigInteger'  => ['bigint'],
         'text'        => [['type' => 'varchar', 'size' => 0]],
         'string'      => ['varchar', 'char'],
diff --git a/src/Driver/SQLite/Schema/SQLiteColumn.php b/src/Driver/SQLite/Schema/SQLiteColumn.php
index b886ddd3..72d3744d 100644
--- a/src/Driver/SQLite/Schema/SQLiteColumn.php
+++ b/src/Driver/SQLite/Schema/SQLiteColumn.php
@@ -55,7 +55,7 @@ class SQLiteColumn extends AbstractColumn
         //bigInteger
         'integer'     => 'integer',
         'tinyInteger' => 'tinyint',
-        'smallInteger'=> 'smallint',
+        'smallInteger' => 'smallint',
         'bigInteger'  => 'bigint',
 
         //String with specified length (mapped via method)
@@ -95,7 +95,7 @@ class SQLiteColumn extends AbstractColumn
         'boolean'     => ['boolean'],
         'integer'     => ['int', 'integer', 'mediumint'],
         'tinyInteger' => ['tinyint'],
-        'smallInteger'=> ['smallint'],
+        'smallInteger' => ['smallint'],
         'bigInteger'  => ['bigint'],
         'text'        => ['text', 'string'],
         'double'      => ['double'],
diff --git a/src/Injection/Alias.php b/src/Injection/Alias.php
new file mode 100644
index 00000000..c0d7bc19
--- /dev/null
+++ b/src/Injection/Alias.php
@@ -0,0 +1,66 @@
+<?php
+
+/**
+ * This file is part of Cycle ORM package.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+declare(strict_types=1);
+
+namespace Cycle\Database\Injection;
+
+use Cycle\Database\Query\ActiveQuery;
+use Cycle\Database\Query\QueryParameters;
+
+class Alias extends Fragment
+{
+    /**
+     * @param non-empty-string $fragment
+     */
+    private function __construct(
+        protected string $fragment,
+        protected array $parameters = []
+    ) {
+        parent::__construct($fragment, ...$parameters);
+    }
+
+    /**
+     * @param non-empty-string $alias
+     * @param non-empty-string $column
+     */
+    public static function quoted(string $alias, string $column): static
+    {
+        return new static($column . ' AS ' . $alias);
+    }
+
+    /**
+     * @param non-empty-string $alias
+     */
+    public static function query(string $alias, ActiveQuery $query): static
+    {
+        $parameters = new QueryParameters();
+        $statement = $query->sqlStatement($parameters);
+
+        return new static($statement . ' AS ' . $alias, $parameters->getParameters());
+    }
+
+    /**
+     * @param non-empty-string $alias
+     */
+    public static function value(string $alias, mixed $value): static
+    {
+        return new static($value . ' AS ' . $alias, [$value]);
+    }
+
+    /**
+     * @param non-empty-string $alias
+     */
+    public static function fragment(string $alias, FragmentInterface $fragment): static
+    {
+        $tokens = $fragment->getTokens();
+
+        return new static($tokens['fragment'] . ' AS ' . $alias, $tokens['parameters']);
+    }
+}
diff --git a/src/Injection/Expression.php b/src/Injection/Expression.php
index ef02c46d..2e2b9ac5 100644
--- a/src/Injection/Expression.php
+++ b/src/Injection/Expression.php
@@ -18,7 +18,7 @@
  * table and column names. This class will quote and prefix every found table name and column while
  * query compilation.
  *
- * Example: new SQLExpression("table.column = table.column + 1");
+ * Example: new Expression("table.column = table.column + 1");
  *
  * I potentially should have an interface for such class.
  */
diff --git a/src/Injection/Fragment.php b/src/Injection/Fragment.php
index 82aa3e9e..b073861e 100644
--- a/src/Injection/Fragment.php
+++ b/src/Injection/Fragment.php
@@ -14,10 +14,10 @@
 use Cycle\Database\Driver\CompilerInterface;
 
 /**
- * Default implementation of SQLFragmentInterface, provides ability to inject custom SQL code into
+ * Default implementation of FragmentInterface, provides ability to inject custom SQL code into
  * query builders. Usually used to mock database specific functions.
  *
- * Example: ...->where('time_created', '>', new SQLFragment("NOW()"));
+ * Example: ...->where('time_created', '>', new Fragment("NOW()"));
  */
 class Fragment implements FragmentInterface, \Stringable
 {
diff --git a/src/Schema/AbstractColumn.php b/src/Schema/AbstractColumn.php
index 9f29a760..ef2121bb 100644
--- a/src/Schema/AbstractColumn.php
+++ b/src/Schema/AbstractColumn.php
@@ -102,7 +102,7 @@ abstract class AbstractColumn implements ColumnInterface, ElementInterface
         //bigInteger
         'integer'     => null,
         'tinyInteger' => null,
-        'smallInteger'=> null,
+        'smallInteger' => null,
         'bigInteger'  => null,
 
         //String with specified length (mapped via method)
@@ -149,7 +149,7 @@ abstract class AbstractColumn implements ColumnInterface, ElementInterface
         'boolean'     => [],
         'integer'     => [],
         'tinyInteger' => [],
-        'smallInteger'=> [],
+        'smallInteger' => [],
         'bigInteger'  => [],
         'string'      => [],
         'text'        => [],
diff --git a/tests/Database/Functional/Driver/Common/BaseTest.php b/tests/Database/Functional/Driver/Common/BaseTest.php
index 626ec77a..6fa151cc 100644
--- a/tests/Database/Functional/Driver/Common/BaseTest.php
+++ b/tests/Database/Functional/Driver/Common/BaseTest.php
@@ -51,7 +51,7 @@ private function getDriver(array $driverConfig = [], array $connectionConfig = [
     {
         $hash = \hash('crc32', static::DRIVER . ':' . \json_encode($driverConfig) . \json_encode($connectionConfig));
 
-        if (! isset(self::$memoizedDrivers[$hash])) {
+        if (!isset(self::$memoizedDrivers[$hash])) {
             $config = clone self::$config[static::DRIVER];
             assert($config instanceof DriverConfig);