diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9179cab..2cb6b99 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,15 @@
 
 ## [Unreleased]
 
+## [0.2.2] - 2024-01-26
+### Added
+- Having types and fields
+- GroupType instead of anonymous declaration in GroupField
+- UnionType
+
+### Changed
+- Depracated GroupField::FIELD_COLUMN constant, use GroupType::FIELD_COLUMN instead
+
 ## [0.2.1] - 2023-07-03
 ### Added
 - Null and NotNull where comparators
@@ -25,7 +34,8 @@
 - Webonyx driver
 - Webonyx schema transformer
 
-[Unreleased]: https://github.com/efabrica-team/graphql/compare/0.2.1...main
+[Unreleased]: https://github.com/efabrica-team/graphql/compare/0.2.2...main
+[0.2.2]: https://github.com/efabrica-team/graphql/compare/0.2.1...0.2.2
 [0.2.1]: https://github.com/efabrica-team/graphql/compare/0.2.0...0.2.1
 [0.2.0]: https://github.com/efabrica-team/graphql/compare/0.1.0...0.2.0
 [0.1.0]: https://github.com/efabrica-team/graphql/compare/0.0.0...0.1.0
diff --git a/src/Schema/Custom/Arguments/ConditionsArgument.php b/src/Schema/Custom/Arguments/ConditionsArgument.php
index 61f9ba9..0e91660 100644
--- a/src/Schema/Custom/Arguments/ConditionsArgument.php
+++ b/src/Schema/Custom/Arguments/ConditionsArgument.php
@@ -3,6 +3,8 @@
 namespace Efabrica\GraphQL\Schema\Custom\Arguments;
 
 use Efabrica\GraphQL\Schema\Custom\Fields\GroupField;
+use Efabrica\GraphQL\Schema\Custom\Fields\HavingAndField;
+use Efabrica\GraphQL\Schema\Custom\Fields\HavingOrField;
 use Efabrica\GraphQL\Schema\Custom\Fields\WhereAndField;
 use Efabrica\GraphQL\Schema\Custom\Fields\WhereOrField;
 use Efabrica\GraphQL\Schema\Definition\Arguments\FieldArgument;
@@ -20,6 +22,8 @@ public function __construct()
                 ->setFields([
                     new WhereAndField(),
                     new WhereOrField(),
+                    new HavingAndField(),
+                    new HavingOrField(),
                     new GroupField(),
                 ])
         );
diff --git a/src/Schema/Custom/Fields/GroupField.php b/src/Schema/Custom/Fields/GroupField.php
index 3190eac..a70ed35 100644
--- a/src/Schema/Custom/Fields/GroupField.php
+++ b/src/Schema/Custom/Fields/GroupField.php
@@ -2,24 +2,24 @@
 
 namespace Efabrica\GraphQL\Schema\Custom\Fields;
 
+use Efabrica\GraphQL\Schema\Custom\Types\GroupType;
 use Efabrica\GraphQL\Schema\Definition\Fields\InputObjectField;
-use Efabrica\GraphQL\Schema\Definition\Types\InputObjectType;
-use Efabrica\GraphQL\Schema\Definition\Types\Scalar\StringType;
 
 class GroupField extends InputObjectField
 {
     public const NAME = 'group';
 
-    public const FIELD_COLUMN = 'column';
+    /**
+     * TODO: remove in 0.3.0
+     * @deprecated Use GroupType::FIELD_COLUMN instead
+     */
+    public const FIELD_COLUMN = GroupType::FIELD_COLUMN;
 
     public function __construct()
     {
         parent::__construct(
             self::NAME,
-            (new InputObjectType('group_type'))
-                ->setFields([
-                    new InputObjectField(self::FIELD_COLUMN, new StringType()),
-                ])
+            new GroupType()
         );
         $this->setMulti()
             ->setNullable();
diff --git a/src/Schema/Custom/Fields/HavingAndField.php b/src/Schema/Custom/Fields/HavingAndField.php
new file mode 100644
index 0000000..80a0054
--- /dev/null
+++ b/src/Schema/Custom/Fields/HavingAndField.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Efabrica\GraphQL\Schema\Custom\Fields;
+
+use Efabrica\GraphQL\Schema\Custom\Types\HavingType;
+use Efabrica\GraphQL\Schema\Definition\Fields\InputObjectField;
+
+class HavingAndField extends InputObjectField
+{
+    public const NAME = 'having';
+
+    public function __construct()
+    {
+        parent::__construct(
+            self::NAME,
+            new HavingType()
+        );
+
+        $this->setMulti()
+            ->setNullable();
+    }
+}
diff --git a/src/Schema/Custom/Fields/HavingOrField.php b/src/Schema/Custom/Fields/HavingOrField.php
new file mode 100644
index 0000000..6085761
--- /dev/null
+++ b/src/Schema/Custom/Fields/HavingOrField.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace Efabrica\GraphQL\Schema\Custom\Fields;
+
+use Efabrica\GraphQL\Schema\Custom\Types\HavingType;
+use Efabrica\GraphQL\Schema\Definition\Fields\InputObjectField;
+
+class HavingOrField extends InputObjectField
+{
+    public const NAME = 'having_or';
+
+    public function __construct()
+    {
+        parent::__construct(
+            self::NAME,
+            new HavingType()
+        );
+
+        $this->setMulti()
+            ->setNullable();
+    }
+}
diff --git a/src/Schema/Custom/Fields/WhereAndField.php b/src/Schema/Custom/Fields/WhereAndField.php
index 42298cf..19d66d0 100644
--- a/src/Schema/Custom/Fields/WhereAndField.php
+++ b/src/Schema/Custom/Fields/WhereAndField.php
@@ -16,8 +16,7 @@ public function __construct()
             new WhereType()
         );
 
-        $this->setName(self::NAME)
-            ->setMulti()
+        $this->setMulti()
             ->setNullable();
     }
 }
diff --git a/src/Schema/Custom/Fields/WhereOrField.php b/src/Schema/Custom/Fields/WhereOrField.php
index 1d1b11f..d77229f 100644
--- a/src/Schema/Custom/Fields/WhereOrField.php
+++ b/src/Schema/Custom/Fields/WhereOrField.php
@@ -16,8 +16,7 @@ public function __construct()
             new WhereType()
         );
 
-        $this->setName(self::NAME)
-            ->setMulti()
+        $this->setMulti()
             ->setNullable();
     }
 }
diff --git a/src/Schema/Custom/Types/GroupType.php b/src/Schema/Custom/Types/GroupType.php
new file mode 100644
index 0000000..3ad8bbe
--- /dev/null
+++ b/src/Schema/Custom/Types/GroupType.php
@@ -0,0 +1,23 @@
+<?php
+
+namespace Efabrica\GraphQL\Schema\Custom\Types;
+
+use Efabrica\GraphQL\Schema\Definition\Fields\InputObjectField;
+use Efabrica\GraphQL\Schema\Definition\Types\InputObjectType;
+use Efabrica\GraphQL\Schema\Definition\Types\Scalar\StringType;
+
+class GroupType extends InputObjectType
+{
+    public const FIELD_COLUMN = 'column';
+
+    public function __construct()
+    {
+        parent::__construct(
+            'group_type',
+        );
+
+        $this->setFields(fn() => [
+            new InputObjectField(self::FIELD_COLUMN, new StringType()),
+        ]);
+    }
+}
diff --git a/src/Schema/Custom/Types/HavingType.php b/src/Schema/Custom/Types/HavingType.php
new file mode 100644
index 0000000..046acb0
--- /dev/null
+++ b/src/Schema/Custom/Types/HavingType.php
@@ -0,0 +1,35 @@
+<?php
+
+namespace Efabrica\GraphQL\Schema\Custom\Types;
+
+use Efabrica\GraphQL\Schema\Custom\Fields\HavingAndField;
+use Efabrica\GraphQL\Schema\Custom\Fields\HavingOrField;
+use Efabrica\GraphQL\Schema\Definition\Fields\InputObjectField;
+use Efabrica\GraphQL\Schema\Definition\Types\InputObjectType;
+use Efabrica\GraphQL\Schema\Definition\Types\Scalar\StringType;
+
+class HavingType extends InputObjectType
+{
+    public const FIELD_COLUMN = 'column';
+    public const FIELD_VALUE = 'value';
+    public const FIELD_COMPARATOR = 'comparator';
+
+    public function __construct()
+    {
+        parent::__construct(
+            'having_type',
+        );
+
+        $this->setFields(fn() => [
+            new HavingAndField(),
+            new HavingOrField(),
+            (new InputObjectField(self::FIELD_COLUMN, new StringType()))
+                ->setNullable(),
+            (new InputObjectField(self::FIELD_VALUE, new StringType()))
+                ->setMulti()
+                ->setNullable(),
+            (new InputObjectField(self::FIELD_COMPARATOR, new WhereComparatorEnum()))
+                ->setDefaultValue(WhereComparatorEnum::EQUAL),
+        ]);
+    }
+}
diff --git a/src/Schema/Definition/Types/UnionType.php b/src/Schema/Definition/Types/UnionType.php
new file mode 100644
index 0000000..eea6aeb
--- /dev/null
+++ b/src/Schema/Definition/Types/UnionType.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Efabrica\GraphQL\Schema\Definition\Types;
+
+class UnionType extends Type
+{
+    /**
+     * @var ObjectType[]
+     */
+    protected array $objectTypes = [];
+
+    /** @var callable */
+    protected $objectTypesCallback;
+
+    /** @var callable */
+    protected $resolveType;
+
+    public function getObjectTypes(): array
+    {
+        if ($this->objectTypesCallback === null) {
+            return $this->objectTypes;
+        }
+
+        $objectTypes = [];
+        foreach (call_user_func($this->objectTypesCallback) as $type) {
+            $objectTypes[$type->getName()] = $type;
+        }
+
+        return array_merge($objectTypes, $this->objectTypes);
+    }
+
+    public function addObjectType(ObjectType $objectType): self
+    {
+        $this->objectTypes[$objectType->getName()] = $objectType;
+        return $this;
+    }
+
+    /**
+     * @param ObjectType[]|callable $objectTypes
+     */
+    public function setObjectTypes($objectTypes): self
+    {
+        if (is_callable($objectTypes)) {
+            $this->objectTypesCallback = $objectTypes;
+        } else {
+            $this->objectTypes = [];
+            foreach ($objectTypes as $objectType) {
+                $this->objectTypes[$objectType->getName()] = $objectType;
+            }
+        }
+
+        return $this;
+    }
+
+    public function getResolveType(): callable
+    {
+        return $this->resolveType;
+    }
+
+    public function setResolveType(callable $resolveType): self
+    {
+        $this->resolveType = $resolveType;
+        return $this;
+    }
+}
diff --git a/src/Schema/Transformers/WebonyxSchemaTransformer.php b/src/Schema/Transformers/WebonyxSchemaTransformer.php
index 13f8cbf..1a49b64 100644
--- a/src/Schema/Transformers/WebonyxSchemaTransformer.php
+++ b/src/Schema/Transformers/WebonyxSchemaTransformer.php
@@ -18,11 +18,13 @@
 use Efabrica\GraphQL\Schema\Definition\Types\Scalar\ScalarType;
 use Efabrica\GraphQL\Schema\Definition\Types\Scalar\StringType;
 use Efabrica\GraphQL\Schema\Definition\Types\Type;
+use Efabrica\GraphQL\Schema\Definition\Types\UnionType;
 use GraphQL\Type\Definition\EnumType as WebonyxEnumType;
 use GraphQL\Type\Definition\InputObjectType as WebonyxInputObjectType;
 use GraphQL\Type\Definition\ObjectType as WebonyxObjectType;
 use GraphQL\Type\Definition\ResolveInfo as WebonyxResolveInfo;
 use GraphQL\Type\Definition\Type as WebonyxType;
+use GraphQL\Type\Definition\UnionType as WebonyxUnionType;
 use GraphQL\Type\Schema as WebonyxSchema;
 use GraphQL\Type\SchemaConfig as WebonyxSchemaConfig;
 use Throwable;
@@ -89,6 +91,25 @@ private function transformType(Type $type): WebonyxType
                 'description' => $type->getDescription(),
                 'values' => $values,
             ]);
+        } elseif ($type instanceof UnionType) {
+            $transformedType = new WebonyxUnionType([
+                'name' => $type->getName(),
+                'description' => $type->getDescription(),
+                'types' => function () use ($type) {
+                    $objectTypes = [];
+                    foreach ($type->getObjectTypes() as $objectType) {
+                        $objectTypes[] = $this->transformType($objectType);
+                    }
+                    return $objectTypes;
+                },
+                'resolveType' => function($value) use ($type): WebonyxObjectType {
+                    $objectType = $this->transformType(call_user_func($type->getResolveType(), $value));
+                    if (!$objectType instanceof WebonyxObjectType) {
+                        throw new SchemaTransformerException('Union resolveType must be instance of "' . WebonyxObjectType::class . '".');
+                    }
+                    return $objectType;
+                },
+            ]);
         } elseif ($type instanceof InputObjectType) {
             $transformedType = new WebonyxInputObjectType([
                 'name' => $type->getName(),