diff --git a/CHANGELOG.md b/CHANGELOG.md
index bb9fdeba..1ee8a642 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -2,6 +2,21 @@
 
 ## [Unreleased]
 
+## [v8.2.1] - 2020-12-07
+
+- Fix query builder bulk insert. [#612]
+- Fix [#558].
+
+## [v8.2.0] - 2020-12-06
+
+- Improve pagination performance. [#611]
+- Fixes [#563]
+
+## [v8.1.3] - 2020-12-06
+
+- Fix Model::create() with guarded property. [#609]
+- Fix [#596]
+
 ## [v8.1.2] - 2020-12-06
 
 - Fix database presence verifier. [#607]
@@ -115,7 +130,10 @@
 - Fix [#406], [#404].
 - Added more options to Sequence Create Method [#355], credits to [@nikklass].
 
-[Unreleased]: https://github.com/yajra/laravel-oci8/compare/v8.1.2...8.x
+[Unreleased]: https://github.com/yajra/laravel-oci8/compare/v8.2.1...8.x
+[v8.2.1]: https://github.com/yajra/laravel-oci8/compare/v8.2.0...v8.2.1
+[v8.2.0]: https://github.com/yajra/laravel-oci8/compare/v8.1.3...v8.2.0
+[v8.1.3]: https://github.com/yajra/laravel-oci8/compare/v8.1.2...v8.1.3
 [v8.1.2]: https://github.com/yajra/laravel-oci8/compare/v8.1.1...v8.1.2
 [v8.1.1]: https://github.com/yajra/laravel-oci8/compare/v8.1.0...v8.1.1
 [v8.1.0]: https://github.com/yajra/laravel-oci8/compare/v8.0.0...v8.1.0
@@ -169,7 +187,13 @@
 [#598]: https://github.com/yajra/laravel-oci8/pull/598
 [#599]: https://github.com/yajra/laravel-oci8/pull/599
 [#607]: https://github.com/yajra/laravel-oci8/pull/607
+[#609]: https://github.com/yajra/laravel-oci8/pull/609
+[#611]: https://github.com/yajra/laravel-oci8/pull/611
+[#612]: https://github.com/yajra/laravel-oci8/pull/612
 
+[#558]: https://github.com/yajra/laravel-oci8/issue/558
+[#563]: https://github.com/yajra/laravel-oci8/issue/563
+[#596]: https://github.com/yajra/laravel-oci8/issue/596
 [#602]: https://github.com/yajra/laravel-oci8/issue/602
 [#601]: https://github.com/yajra/laravel-oci8/issue/601
 [#590]: https://github.com/yajra/laravel-oci8/issue/590
diff --git a/src/Oci8/Oci8Connection.php b/src/Oci8/Oci8Connection.php
index 46830738..e807b43d 100644
--- a/src/Oci8/Oci8Connection.php
+++ b/src/Oci8/Oci8Connection.php
@@ -487,4 +487,18 @@ public function useCaseSensitiveSession()
     {
         return $this->setSessionVars(['NLS_COMP' => 'BINARY', 'NLS_SORT' => 'BINARY']);
     }
+
+    /**
+     * Bind values to their parameters in the given statement.
+     *
+     * @param  \Yajra\Pdo\Oci8\Statement  $statement
+     * @param  array  $bindings
+     * @return void
+     */
+    public function bindValues($statement, $bindings)
+    {
+        foreach ($bindings as $key => $value) {
+            $statement->bindValue(is_string($key) ? $key : $key + 1, $value);
+        }
+    }
 }
diff --git a/src/Oci8/Query/Grammars/OracleGrammar.php b/src/Oci8/Query/Grammars/OracleGrammar.php
index 291b68b3..580a54fb 100644
--- a/src/Oci8/Query/Grammars/OracleGrammar.php
+++ b/src/Oci8/Query/Grammars/OracleGrammar.php
@@ -161,6 +161,13 @@ protected function compileTableExpression($sql, $constraint, $query)
             return "select * from ({$sql}) where rownum {$constraint}";
         }
 
+        if (! is_null($query->limit && ! is_null($query->offset))) {
+            $start  = $query->offset + 1;
+            $finish = $query->offset + $query->limit;
+
+            return "select t2.* from ( select rownum AS \"rn\", t1.* from ({$sql}) t1 where rownum <= {$finish}) t2 where t2.\"rn\" >= {$start}";
+        }
+
         return "select t2.* from ( select rownum AS \"rn\", t1.* from ({$sql}) t1 ) t2 where t2.\"rn\" {$constraint}";
     }
 
diff --git a/src/Oci8/Query/Processors/OracleProcessor.php b/src/Oci8/Query/Processors/OracleProcessor.php
index 771fb95e..1cde34ec 100644
--- a/src/Oci8/Query/Processors/OracleProcessor.php
+++ b/src/Oci8/Query/Processors/OracleProcessor.php
@@ -169,7 +169,7 @@ public function processColumnListing($results)
         $mapping = function ($r) {
             $r = (object) $r;
 
-            return $r->column_name;
+            return strtolower($r->column_name);
         };
 
         return array_map($mapping, $results);
diff --git a/tests/Database/Oci8QueryBuilderTest.php b/tests/Database/Oci8QueryBuilderTest.php
index 4df48419..2771b335 100644
--- a/tests/Database/Oci8QueryBuilderTest.php
+++ b/tests/Database/Oci8QueryBuilderTest.php
@@ -267,8 +267,10 @@ public function testSubSelectWhereIns()
         $builder->select('*')->from('users')->whereIn('id', function ($q) {
             $q->select('id')->from('users')->where('age', '>', 25)->take(3);
         });
-        $this->assertEquals('select * from "USERS" where "ID" in (select t2.* from ( select rownum AS "rn", t1.* from (select "ID" from "USERS" where "AGE" > ?) t1 ) t2 where t2."rn" between 1 and 3)',
-            $builder->toSql());
+        $this->assertEquals(
+            'select * from "USERS" where "ID" in (select t2.* from ( select rownum AS "rn", t1.* from (select "ID" from "USERS" where "AGE" > ?) t1 where rownum <= 3) t2 where t2."rn" >= 1)',
+            $builder->toSql()
+        );
         $this->assertEquals([25], $builder->getBindings());
 
         $builder    = $this->getBuilder();
@@ -279,8 +281,10 @@ public function testSubSelectWhereIns()
         $builder->select('*')->from('users')->whereNotIn('id', function ($q) {
             $q->select('id')->from('users')->where('age', '>', 25)->take(3);
         });
-        $this->assertEquals('select * from "USERS" where "ID" not in (select t2.* from ( select rownum AS "rn", t1.* from (select "ID" from "USERS" where "AGE" > ?) t1 ) t2 where t2."rn" between 1 and 3)',
-            $builder->toSql());
+        $this->assertEquals(
+            'select * from "USERS" where "ID" not in (select t2.* from ( select rownum AS "rn", t1.* from (select "ID" from "USERS" where "AGE" > ?) t1 where rownum <= 3) t2 where t2."rn" >= 1)',
+            $builder->toSql()
+        );
         $this->assertEquals([25], $builder->getBindings());
     }
 
@@ -361,8 +365,10 @@ public function testOffset()
         $connection = $builder->getConnection();
         $connection->shouldReceive('getConfig')->andReturn('');
         $builder->select('*')->from('users')->offset(10);
-        $this->assertEquals('select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 ) t2 where t2."rn" >= 11',
-            $builder->toSql());
+        $this->assertEquals(
+            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 where rownum <= 10) t2 where t2."rn" >= 11',
+            $builder->toSql()
+        );
     }
 
     public function testLimitsAndOffsets()
@@ -371,36 +377,46 @@ public function testLimitsAndOffsets()
         $connection = $builder->getConnection();
         $connection->shouldReceive('getConfig')->andReturn('');
         $builder->select('*')->from('users')->offset(5)->limit(10);
-        $this->assertEquals('select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 ) t2 where t2."rn" between 6 and 15',
-            $builder->toSql());
+        $this->assertEquals(
+            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 where rownum <= 15) t2 where t2."rn" >= 6',
+            $builder->toSql()
+        );
 
         $builder    = $this->getBuilder();
         $connection = $builder->getConnection();
         $connection->shouldReceive('getConfig')->andReturn('');
         $builder->select('*')->from('users')->skip(5)->take(10);
-        $this->assertEquals('select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 ) t2 where t2."rn" between 6 and 15',
-            $builder->toSql());
+        $this->assertEquals(
+            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 where rownum <= 15) t2 where t2."rn" >= 6',
+            $builder->toSql()
+        );
 
         $builder    = $this->getBuilder();
         $connection = $builder->getConnection();
         $connection->shouldReceive('getConfig')->andReturn('');
         $builder->select('*')->from('users')->skip(-5)->take(10);
-        $this->assertEquals('select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 ) t2 where t2."rn" between 1 and 10',
-            $builder->toSql());
+        $this->assertEquals(
+            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 where rownum <= 10) t2 where t2."rn" >= 1',
+            $builder->toSql()
+        );
 
         $builder    = $this->getBuilder();
         $connection = $builder->getConnection();
         $connection->shouldReceive('getConfig')->andReturn('');
         $builder->select('*')->from('users')->forPage(2, 15);
-        $this->assertEquals('select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 ) t2 where t2."rn" between 16 and 30',
-            $builder->toSql());
+        $this->assertEquals(
+            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 where rownum <= 30) t2 where t2."rn" >= 16',
+            $builder->toSql()
+        );
 
         $builder    = $this->getBuilder();
         $connection = $builder->getConnection();
         $connection->shouldReceive('getConfig')->andReturn('');
         $builder->select('*')->from('users')->forPage(-2, 15);
-        $this->assertEquals('select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 ) t2 where t2."rn" between 1 and 15',
-            $builder->toSql());
+        $this->assertEquals(
+            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 where rownum <= 15) t2 where t2."rn" >= 1',
+            $builder->toSql()
+        );
     }
 
     public function testLimitAndOffsetToPaginateOne()
@@ -410,7 +426,7 @@ public function testLimitAndOffsetToPaginateOne()
         $connection->shouldReceive('getConfig')->andReturn('');
         $builder->select('*')->from('users')->offset(0)->limit(1);
         $this->assertEquals(
-            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 ) t2 where t2."rn" between 1 and 1',
+            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 where rownum <= 1) t2 where t2."rn" >= 1',
             $builder->toSql()
         );
 
@@ -419,7 +435,7 @@ public function testLimitAndOffsetToPaginateOne()
         $connection->shouldReceive('getConfig')->andReturn('');
         $builder->select('*')->from('users')->offset(1)->limit(1);
         $this->assertEquals(
-            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 ) t2 where t2."rn" between 2 and 2',
+            'select t2.* from ( select rownum AS "rn", t1.* from (select * from "USERS") t1 where rownum <= 2) t2 where t2."rn" >= 2',
             $builder->toSql()
         );
     }
diff --git a/tests/Functional/ModelTest.php b/tests/Functional/ModelTest.php
new file mode 100644
index 00000000..1e2e9a8a
--- /dev/null
+++ b/tests/Functional/ModelTest.php
@@ -0,0 +1,65 @@
+<?php
+
+namespace Yajra\Oci8\Tests\Functional;
+
+use Yajra\Oci8\Tests\User;
+use Yajra\Oci8\Tests\TestCase;
+use Yajra\Oci8\Tests\UserWithGuardedProperty;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+
+class ModelTest extends TestCase
+{
+    use DatabaseTransactions;
+
+    /** @test */
+    public function it_can_fill_a_model_to_create_a_record()
+    {
+        $attributes = [
+            'name'  => 'John',
+            'email' => 'john@example.com',
+        ];
+
+        $model = new User;
+        $model->fill($attributes);
+        $model->save();
+
+        $this->assertDatabaseHas('users', $attributes);
+    }
+
+    /** @test */
+    public function it_can_insert_record_using_a_model()
+    {
+        User::query()->insert($attributes = [
+            'name'  => 'John',
+            'email' => 'john@example.com',
+        ]);
+
+        $this->assertDatabaseHas('users', $attributes);
+    }
+
+    /** @test */
+    public function it_can_create_guarded_model_by_setting_the_property()
+    {
+        $count = UserWithGuardedProperty::count();
+
+        $user        = new UserWithGuardedProperty;
+        $user->name  = 'Test';
+        $user->email = 'test@example.com';
+        $user->save();
+
+        $this->assertDatabaseCount('users', $count + 1);
+    }
+
+    /** @test */
+    public function it_can_create_guarded_model_using_create_method()
+    {
+        $count = UserWithGuardedProperty::count();
+
+        UserWithGuardedProperty::create([
+            'name'  => 'Test',
+            'email' => 'test@example.com',
+        ]);
+
+        $this->assertDatabaseCount('users', $count + 1);
+    }
+}
diff --git a/tests/Functional/QueryBuilderTest.php b/tests/Functional/QueryBuilderTest.php
new file mode 100644
index 00000000..f0d74a33
--- /dev/null
+++ b/tests/Functional/QueryBuilderTest.php
@@ -0,0 +1,37 @@
+<?php
+
+namespace Yajra\Oci8\Tests\Functional;
+
+use Yajra\Oci8\Tests\TestCase;
+use Illuminate\Foundation\Testing\DatabaseTransactions;
+
+class QueryBuilderTest extends TestCase
+{
+    use DatabaseTransactions;
+
+    /** @test */
+    public function it_can_perform_insert()
+    {
+        $data = ['name' => 'Foo', 'job_id' => null];
+
+        $this->getConnection()->table('jobs')->insert($data);
+
+        $this->assertDatabaseCount('jobs', 1);
+    }
+
+    /** @test */
+    public function it_can_perform_bulk_inserts()
+    {
+        $data = [
+            ['name' => 'Foo', 'job_id' => null],
+            ['name' => 'Bar', 'job_id' => 1],
+            ['name' => 'Test', 'job_id' => 2],
+            ['name' => null, 'job_id' => 4],
+            ['name' => null, 'job_id' => null],
+        ];
+
+        $this->getConnection()->table('jobs')->insert($data);
+
+        $this->assertDatabaseCount('jobs', 5);
+    }
+}
diff --git a/tests/TestCase.php b/tests/TestCase.php
index 5de0f04c..aedd7930 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -22,20 +22,30 @@ protected function migrateDatabase()
     {
         /** @var \Illuminate\Database\Schema\Builder $schemaBuilder */
         $schemaBuilder = $this->app['db']->connection()->getSchemaBuilder();
-        if (! $schemaBuilder->hasTable('users')) {
-            $schemaBuilder->create('users', function (Blueprint $table) {
-                $table->increments('id');
-                $table->string('name');
-                $table->string('email');
-                $table->timestamps();
-            });
+        if ($schemaBuilder->hasTable('users')) {
+            $schemaBuilder->drop('users');
         }
+
+        $schemaBuilder->create('users', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('name');
+            $table->string('email');
+            $table->timestamps();
+        });
+
+        if ($schemaBuilder->hasTable('jobs')) {
+            $schemaBuilder->drop('jobs');
+        }
+
+        $schemaBuilder->create('jobs', function (Blueprint $table) {
+            $table->increments('id');
+            $table->string('name')->nullable();
+            $table->integer('job_id')->nullable();
+        });
     }
 
     protected function seedDatabase()
     {
-        User::query()->truncate();
-
         collect(range(1, 20))->each(function ($i) {
             /** @var User $user */
             User::query()->create([
diff --git a/tests/User.php b/tests/User.php
index f16841bd..1890db3c 100644
--- a/tests/User.php
+++ b/tests/User.php
@@ -4,6 +4,11 @@
 
 use Illuminate\Database\Eloquent\Model;
 
+/**
+ * @property int id
+ * @property string name
+ * @property string email
+ */
 class User extends Model
 {
     protected $guarded = [];
diff --git a/tests/UserWithGuardedProperty.php b/tests/UserWithGuardedProperty.php
new file mode 100644
index 00000000..149c02d7
--- /dev/null
+++ b/tests/UserWithGuardedProperty.php
@@ -0,0 +1,10 @@
+<?php
+
+namespace Yajra\Oci8\Tests;
+
+class UserWithGuardedProperty extends User
+{
+    protected $table = 'users';
+
+    protected $guarded = ['id'];
+}