diff --git a/CHANGELOG.md b/CHANGELOG.md
index 30b03a0..4cf4b2f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -15,7 +15,7 @@
 - Enh #279: Separate column type constants (@Tigrov)
 - New #280, #291: Realize `ColumnBuilder` class (@Tigrov)
 - Enh #281: Update according changes in `ColumnSchemaInterface` (@Tigrov)
-- New #282, #291: Add `ColumnDefinitionBuilder` class (@Tigrov)
+- New #282, #291, #299: Add `ColumnDefinitionBuilder` class (@Tigrov)
 - Bug #285: Fix `DMLQueryBuilder::insertBatch()` method (@Tigrov)
 - Enh #283: Refactor `Dsn` class (@Tigrov)
 - Enh #286: Use constructor to create columns and initialize properties (@Tigrov)
@@ -27,6 +27,8 @@
 - Enh #296: Remove `ColumnInterface` (@Tigrov)
 - Enh #298: Rename `ColumnSchemaInterface` to `ColumnInterface` (@Tigrov)
 - Enh #298: Refactor `DMLQueryBuilder::prepareInsertValues()` method (@Tigrov)
+- Enh #299: Add `ColumnDefinitionParser` class (@Tigrov)
+- Enh #299: Convert database types to lower case (@Tigrov)
 
 ## 1.3.0 March 21, 2024
 
diff --git a/src/Column/BinaryColumn.php b/src/Column/BinaryColumn.php
index 9adc51f..3b95854 100644
--- a/src/Column/BinaryColumn.php
+++ b/src/Column/BinaryColumn.php
@@ -14,7 +14,7 @@ final class BinaryColumn extends BaseBinaryColumn
 {
     public function dbTypecast(mixed $value): mixed
     {
-        if ($this->getDbType() === 'BLOB') {
+        if ($this->getDbType() === 'blob') {
             if ($value instanceof ParamInterface && is_string($value->getValue())) {
                 /** @var string */
                 $value = $value->getValue();
diff --git a/src/Column/ColumnDefinitionBuilder.php b/src/Column/ColumnDefinitionBuilder.php
index 43acc39..93384bb 100644
--- a/src/Column/ColumnDefinitionBuilder.php
+++ b/src/Column/ColumnDefinitionBuilder.php
@@ -64,37 +64,46 @@ protected function buildOnUpdate(string $onUpdate): string
 
     protected function getDbType(ColumnInterface $column): string
     {
+        $dbType = $column->getDbType();
         $size = $column->getSize();
+        $scale = $column->getScale();
 
         /** @psalm-suppress DocblockTypeContradiction */
-        return $column->getDbType() ?? match ($column->getType()) {
-            ColumnType::BOOLEAN => 'number(1)',
-            ColumnType::BIT => match (true) {
-                $size === null => 'number(38)',
-                $size <= 126 => 'number(' . ceil(log10(2 ** $size)) . ')',
-                default => 'raw(' . ceil($size / 8) . ')',
+        return match ($dbType) {
+            default => $dbType,
+            null => match ($column->getType()) {
+                ColumnType::BOOLEAN => 'number(1)',
+                ColumnType::BIT => match (true) {
+                    $size === null => 'number(38)',
+                    $size <= 126 => 'number(' . ceil(log10(2 ** $size)) . ')',
+                    default => 'raw(' . ceil($size / 8) . ')',
+                },
+                ColumnType::TINYINT => 'number(' . ($size ?? 3) . ')',
+                ColumnType::SMALLINT => 'number(' . ($size ?? 5) . ')',
+                ColumnType::INTEGER => 'number(' . ($size ?? 10) . ')',
+                ColumnType::BIGINT => 'number(' . ($size ?? 20) . ')',
+                ColumnType::FLOAT => 'binary_float',
+                ColumnType::DOUBLE => 'binary_double',
+                ColumnType::DECIMAL => 'number(' . ($size ?? 10) . ',' . ($scale ?? 0) . ')',
+                ColumnType::MONEY => 'number(' . ($size ?? 19) . ',' . ($scale ?? 4) . ')',
+                ColumnType::CHAR => 'char',
+                ColumnType::STRING => 'varchar2(' . ($size ?? 255) . ')',
+                ColumnType::TEXT => 'clob',
+                ColumnType::BINARY => 'blob',
+                ColumnType::UUID => 'raw(16)',
+                ColumnType::DATETIME => 'timestamp',
+                ColumnType::TIMESTAMP => 'timestamp',
+                ColumnType::DATE => 'date',
+                ColumnType::TIME => 'interval day(0) to second',
+                ColumnType::ARRAY => 'clob',
+                ColumnType::STRUCTURED => 'clob',
+                ColumnType::JSON => 'clob',
+                default => 'varchar2',
             },
-            ColumnType::TINYINT => 'number(' . ($size ?? 3) . ')',
-            ColumnType::SMALLINT => 'number(' . ($size ?? 5) . ')',
-            ColumnType::INTEGER => 'number(' . ($size ?? 10) . ')',
-            ColumnType::BIGINT => 'number(' . ($size ?? 20) . ')',
-            ColumnType::FLOAT => 'binary_float',
-            ColumnType::DOUBLE => 'binary_double',
-            ColumnType::DECIMAL => 'number(' . ($size ?? 10) . ',' . ($column->getScale() ?? 0) . ')',
-            ColumnType::MONEY => 'number(' . ($size ?? 19) . ',' . ($column->getScale() ?? 4) . ')',
-            ColumnType::CHAR => 'char',
-            ColumnType::STRING => 'varchar2(' . ($size ?? 255) . ')',
-            ColumnType::TEXT => 'clob',
-            ColumnType::BINARY => 'blob',
-            ColumnType::UUID => 'raw(16)',
-            ColumnType::DATETIME => 'timestamp',
-            ColumnType::TIMESTAMP => 'timestamp',
-            ColumnType::DATE => 'date',
-            ColumnType::TIME => 'interval day(0) to second',
-            ColumnType::ARRAY => 'clob',
-            ColumnType::STRUCTURED => 'clob',
-            ColumnType::JSON => 'clob',
-            default => 'varchar2',
+            'timestamp with time zone' => 'timestamp' . ($size !== null ? "($size)" : '') . ' with time zone',
+            'timestamp with local time zone' => 'timestamp' . ($size !== null ? "($size)" : '') . ' with local time zone',
+            'interval day to second' => 'interval day' . ($scale !== null ? "($scale)" : '') . ' to second' . ($size !== null ? "($size)" : ''),
+            'interval year to month' => 'interval year' . ($scale !== null ? "($scale)" : '') . ' to month',
         };
     }
 
diff --git a/src/Column/ColumnDefinitionParser.php b/src/Column/ColumnDefinitionParser.php
new file mode 100644
index 0000000..120d444
--- /dev/null
+++ b/src/Column/ColumnDefinitionParser.php
@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\Db\Oracle\Column;
+
+use function preg_match;
+use function preg_replace;
+use function strlen;
+use function strtolower;
+use function substr;
+
+/**
+ * Parses column definition string. For example, `string(255)` or `int unsigned`.
+ */
+final class ColumnDefinitionParser extends \Yiisoft\Db\Syntax\ColumnDefinitionParser
+{
+    private const TYPE_PATTERN = '/^('
+        . 'timestamp\s*(?:\((\d+)\))? with(?: local)? time zone'
+        . '|interval year\s*(?:\((\d+)\))? to month'
+        . ')|('
+        . 'interval day\s*(?:\((\d+)\))? to second'
+        . '|long raw'
+        . '|\w*'
+        . ')\s*(?:\(([^)]+)\))?\s*'
+        . '/i';
+
+    public function parse(string $definition): array
+    {
+        preg_match(self::TYPE_PATTERN, $definition, $matches);
+
+        $type = strtolower(preg_replace('/\s*\(\d+\)/', '', $matches[4] ?? $matches[1]));
+        $info = ['type' => $type];
+
+        $typeDetails = $matches[6] ?? $matches[2] ?? '';
+
+        if ($typeDetails !== '') {
+            if ($type === 'enum') {
+                $info += $this->enumInfo($typeDetails);
+            } else {
+                $info += $this->sizeInfo($typeDetails);
+            }
+        }
+
+        $scale = $matches[5] ?? $matches[3] ?? '';
+
+        if ($scale !== '') {
+            $info += ['scale' => (int) $scale];
+        }
+
+        $extra = substr($definition, strlen($matches[0]));
+
+        return $info + $this->extraInfo($extra);
+    }
+}
diff --git a/src/Column/ColumnFactory.php b/src/Column/ColumnFactory.php
index b2fa346..29f301f 100644
--- a/src/Column/ColumnFactory.php
+++ b/src/Column/ColumnFactory.php
@@ -8,9 +8,7 @@
 use Yiisoft\Db\Schema\Column\AbstractColumnFactory;
 use Yiisoft\Db\Schema\Column\ColumnInterface;
 
-use function preg_replace;
 use function rtrim;
-use function strtolower;
 
 final class ColumnFactory extends AbstractColumnFactory
 {
@@ -40,19 +38,23 @@ final class ColumnFactory extends AbstractColumnFactory
         'binary_double' => ColumnType::DOUBLE, // 64 bit
         'float' => ColumnType::DOUBLE, // 126 bit
         'date' => ColumnType::DATE,
-        'interval day to second' => ColumnType::TIME,
         'timestamp' => ColumnType::TIMESTAMP,
         'timestamp with time zone' => ColumnType::TIMESTAMP,
         'timestamp with local time zone' => ColumnType::TIMESTAMP,
+        'interval day to second' => ColumnType::STRING,
+        'interval year to month' => ColumnType::STRING,
 
         /** Deprecated */
         'long' => ColumnType::TEXT,
     ];
 
-    protected function getType(string $dbType, array $info = []): string
+    protected function columnDefinitionParser(): ColumnDefinitionParser
     {
-        $dbType = strtolower($dbType);
+        return new ColumnDefinitionParser();
+    }
 
+    protected function getType(string $dbType, array $info = []): string
+    {
         if ($dbType === 'number') {
             return match ($info['scale'] ?? null) {
                 null => ColumnType::DOUBLE,
@@ -61,10 +63,8 @@ protected function getType(string $dbType, array $info = []): string
             };
         }
 
-        $dbType = preg_replace('/\([^)]+\)/', '', $dbType);
-
-        if ($dbType === 'interval day to second' && isset($info['size']) && $info['size'] > 0) {
-            return ColumnType::STRING;
+        if ($dbType === 'interval day to second' && isset($info['scale']) && $info['scale'] === 0) {
+            return ColumnType::TIME;
         }
 
         return parent::getType($dbType, $info);
diff --git a/src/Command.php b/src/Command.php
index 8a28cca..196a689 100644
--- a/src/Command.php
+++ b/src/Command.php
@@ -5,7 +5,7 @@
 namespace Yiisoft\Db\Oracle;
 
 use PDO;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Constant\PhpType;
 use Yiisoft\Db\Driver\Pdo\AbstractPdoCommand;
 use Yiisoft\Db\QueryBuilder\AbstractQueryBuilder;
diff --git a/src/Schema.php b/src/Schema.php
index 490a62b..a07caae 100644
--- a/src/Schema.php
+++ b/src/Schema.php
@@ -27,7 +27,9 @@
 use function implode;
 use function is_array;
 use function md5;
+use function preg_replace;
 use function serialize;
+use function strtolower;
 
 /**
  * Implements the Oracle Server specific schema, supporting Oracle Server 11C and above.
@@ -437,7 +439,18 @@ protected function getTableSequenceName(string $tableName): string|null
      */
     private function loadColumn(array $info): ColumnInterface
     {
-        return $this->getColumnFactory()->fromDbType($info['data_type'], [
+        $dbType = strtolower(preg_replace('/\([^)]+\)/', '', $info['data_type']));
+
+        match ($dbType) {
+            'timestamp',
+            'timestamp with time zone',
+            'timestamp with local time zone',
+            'interval day to second',
+            'interval year to month' => [$info['size'], $info['data_scale']] = [$info['data_scale'], $info['size']],
+            default => null,
+        };
+
+        return $this->getColumnFactory()->fromDbType($dbType, [
             'autoIncrement' => $info['identity_column'] === 'YES',
             'comment' => $info['column_comment'],
             'defaultValueRaw' => $info['data_default'],
diff --git a/tests/ColumnDefinitionParserTest.php b/tests/ColumnDefinitionParserTest.php
new file mode 100644
index 0000000..de74477
--- /dev/null
+++ b/tests/ColumnDefinitionParserTest.php
@@ -0,0 +1,27 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\Db\Oracle\Tests;
+
+use Yiisoft\Db\Oracle\Column\ColumnDefinitionParser;
+use Yiisoft\Db\Tests\AbstractColumnDefinitionParserTest;
+
+/**
+ * @group oracle
+ */
+final class ColumnDefinitionParserTest extends AbstractColumnDefinitionParserTest
+{
+    protected function createColumnDefinitionParser(): ColumnDefinitionParser
+    {
+        return new ColumnDefinitionParser();
+    }
+
+    /**
+     * @dataProvider \Yiisoft\Db\Oracle\Tests\Provider\ColumnDefinitionParserProvider::parse
+     */
+    public function testParse(string $definition, array $expected): void
+    {
+        parent::testParse($definition, $expected);
+    }
+}
diff --git a/tests/ColumnTest.php b/tests/ColumnTest.php
index b0e0231..cce1985 100644
--- a/tests/ColumnTest.php
+++ b/tests/ColumnTest.php
@@ -96,7 +96,7 @@ public function testDbTypecastColumns(string $className, array $values): void
     public function testBinaryColumn(): void
     {
         $binaryCol = new BinaryColumn();
-        $binaryCol->dbType('BLOB');
+        $binaryCol->dbType('blob');
 
         $this->assertInstanceOf(Expression::class, $binaryCol->dbTypecast("\x10\x11\x12"));
         $this->assertInstanceOf(
diff --git a/tests/Provider/ColumnDefinitionParserProvider.php b/tests/Provider/ColumnDefinitionParserProvider.php
new file mode 100644
index 0000000..f697de7
--- /dev/null
+++ b/tests/Provider/ColumnDefinitionParserProvider.php
@@ -0,0 +1,24 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\Db\Oracle\Tests\Provider;
+
+class ColumnDefinitionParserProvider extends \Yiisoft\Db\Tests\Provider\ColumnDefinitionParserProvider
+{
+    public static function parse(): array
+    {
+        return [
+            ...parent::parse(),
+            ['long raw', ['type' => 'long raw']],
+            ['interval day to second', ['type' => 'interval day to second']],
+            ['interval day to second (2)', ['type' => 'interval day to second', 'size' => 2]],
+            ['interval day(0) to second(2)', ['type' => 'interval day to second', 'size' => 2, 'scale' => 0]],
+            ['timestamp with time zone', ['type' => 'timestamp with time zone']],
+            ['timestamp (3) with time zone', ['type' => 'timestamp with time zone', 'size' => 3]],
+            ['timestamp(3) with local time zone', ['type' => 'timestamp with local time zone', 'size' => 3]],
+            ['interval year to month', ['type' => 'interval year to month']],
+            ['interval year (3) to month', ['type' => 'interval year to month', 'scale' => 3]],
+        ];
+    }
+}
diff --git a/tests/Provider/ColumnFactoryProvider.php b/tests/Provider/ColumnFactoryProvider.php
index 913dc0a..8004f3a 100644
--- a/tests/Provider/ColumnFactoryProvider.php
+++ b/tests/Provider/ColumnFactoryProvider.php
@@ -32,10 +32,12 @@ public static function dbTypes(): array
             ['binary_double', ColumnType::DOUBLE, DoubleColumn::class],
             ['float', ColumnType::DOUBLE, DoubleColumn::class],
             ['date', ColumnType::DATE, StringColumn::class],
-            ['interval day(0) to second', ColumnType::TIME, StringColumn::class],
             ['timestamp', ColumnType::TIMESTAMP, StringColumn::class],
             ['timestamp with time zone', ColumnType::TIMESTAMP, StringColumn::class],
             ['timestamp with local time zone', ColumnType::TIMESTAMP, StringColumn::class],
+            ['timestamp with local time zone', ColumnType::TIMESTAMP, StringColumn::class],
+            ['interval day to second', ColumnType::STRING, StringColumn::class],
+            ['interval year to month', ColumnType::STRING, StringColumn::class],
         ];
     }
 
@@ -52,7 +54,15 @@ public static function definitions(): array
 
         unset($definitions['bigint UNSIGNED']);
 
-        return $definitions;
+        return [
+            ...$definitions,
+            ['interval day to second', ColumnType::STRING, StringColumn::class, ['getDbType' => 'interval day to second']],
+            ['interval day(0) to second', ColumnType::TIME, StringColumn::class, ['getDbType' => 'interval day to second', 'getScale' => 0]],
+            ['interval day (0) to second(6)', ColumnType::TIME, StringColumn::class, ['getDbType' => 'interval day to second', 'getScale' => 0, 'getSize' => 6]],
+            ['interval day to second (0)', ColumnType::STRING, StringColumn::class, ['getDbType' => 'interval day to second', 'getSize' => 0]],
+            ['interval year to month', ColumnType::STRING, StringColumn::class, ['getDbType' => 'interval year to month']],
+            ['interval year (2) to month', ColumnType::STRING, StringColumn::class, ['getDbType' => 'interval year to month', 'getScale' => 2]],
+        ];
     }
 
     public static function defaultValueRaw(): array
diff --git a/tests/Provider/QueryBuilderProvider.php b/tests/Provider/QueryBuilderProvider.php
index ce28d35..9f4e229 100644
--- a/tests/Provider/QueryBuilderProvider.php
+++ b/tests/Provider/QueryBuilderProvider.php
@@ -344,6 +344,10 @@ public static function buildColumnDefinition(): array
 
             ['number(10) REFERENCES "ref_table" ("id")', ColumnBuilder::integer()->reference($referenceRestrict)],
             ['number(10) REFERENCES "ref_table" ("id") ON DELETE SET NULL', ColumnBuilder::integer()->reference($referenceSetNull)],
+            ['timestamp(3) with time zone', 'timestamp (3) with time zone'],
+            ['timestamp with local time zone', 'timestamp with local time zone'],
+            ['interval day(5) to second(6)', 'interval day(5) to second (6)'],
+            ['interval year(8) to month', 'interval year(8) to month'],
         ];
     }
 
diff --git a/tests/Provider/SchemaProvider.php b/tests/Provider/SchemaProvider.php
index 8a406d8..dcd4a48 100644
--- a/tests/Provider/SchemaProvider.php
+++ b/tests/Provider/SchemaProvider.php
@@ -17,7 +17,7 @@ public static function columns(): array
                 [
                     'int_col' => [
                         'type' => 'integer',
-                        'dbType' => 'NUMBER',
+                        'dbType' => 'number',
                         'phpType' => 'int',
                         'primaryKey' => false,
                         'notNull' => true,
@@ -29,7 +29,7 @@ public static function columns(): array
                     ],
                     'int_col2' => [
                         'type' => 'integer',
-                        'dbType' => 'NUMBER',
+                        'dbType' => 'number',
                         'phpType' => 'int',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -41,7 +41,7 @@ public static function columns(): array
                     ],
                     'tinyint_col' => [
                         'type' => 'integer',
-                        'dbType' => 'NUMBER',
+                        'dbType' => 'number',
                         'phpType' => 'int',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -53,7 +53,7 @@ public static function columns(): array
                     ],
                     'smallint_col' => [
                         'type' => 'integer',
-                        'dbType' => 'NUMBER',
+                        'dbType' => 'number',
                         'phpType' => 'int',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -65,7 +65,7 @@ public static function columns(): array
                     ],
                     'char_col' => [
                         'type' => 'char',
-                        'dbType' => 'CHAR',
+                        'dbType' => 'char',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => true,
@@ -77,7 +77,7 @@ public static function columns(): array
                     ],
                     'char_col2' => [
                         'type' => 'string',
-                        'dbType' => 'VARCHAR2',
+                        'dbType' => 'varchar2',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -89,7 +89,7 @@ public static function columns(): array
                     ],
                     'char_col3' => [
                         'type' => 'string',
-                        'dbType' => 'VARCHAR2',
+                        'dbType' => 'varchar2',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -101,7 +101,7 @@ public static function columns(): array
                     ],
                     'nvarchar_col' => [
                         'type' => 'string',
-                        'dbType' => 'NVARCHAR2',
+                        'dbType' => 'nvarchar2',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -113,7 +113,7 @@ public static function columns(): array
                     ],
                     'float_col' => [
                         'type' => 'double',
-                        'dbType' => 'FLOAT',
+                        'dbType' => 'float',
                         'phpType' => 'float',
                         'primaryKey' => false,
                         'notNull' => true,
@@ -125,7 +125,7 @@ public static function columns(): array
                     ],
                     'float_col2' => [
                         'type' => 'double',
-                        'dbType' => 'FLOAT',
+                        'dbType' => 'float',
                         'phpType' => 'float',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -137,7 +137,7 @@ public static function columns(): array
                     ],
                     'blob_col' => [
                         'type' => 'binary',
-                        'dbType' => 'BLOB',
+                        'dbType' => 'blob',
                         'phpType' => 'mixed',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -149,7 +149,7 @@ public static function columns(): array
                     ],
                     'numeric_col' => [
                         'type' => 'decimal',
-                        'dbType' => 'NUMBER',
+                        'dbType' => 'number',
                         'phpType' => 'float',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -161,19 +161,19 @@ public static function columns(): array
                     ],
                     'timestamp_col' => [
                         'type' => 'timestamp',
-                        'dbType' => 'TIMESTAMP(6)',
+                        'dbType' => 'timestamp',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => true,
                         'autoIncrement' => false,
                         'enumValues' => null,
-                        'size' => null,
-                        'scale' => 6,
+                        'size' => 6,
+                        'scale' => null,
                         'defaultValue' => new Expression("to_timestamp('2002-01-01 00:00:00', 'yyyy-mm-dd hh24:mi:ss')"),
                     ],
                     'time_col' => [
                         'type' => 'time',
-                        'dbType' => 'INTERVAL DAY(0) TO SECOND(0)',
+                        'dbType' => 'interval day to second',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -185,19 +185,19 @@ public static function columns(): array
                     ],
                     'interval_day_col' => [
                         'type' => 'string',
-                        'dbType' => 'INTERVAL DAY(1) TO SECOND(0)',
+                        'dbType' => 'interval day to second',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => false,
                         'autoIncrement' => false,
                         'enumValues' => null,
-                        'size' => 1,
-                        'scale' => 0,
+                        'size' => 0,
+                        'scale' => 1,
                         'defaultValue' => new Expression("INTERVAL '2 04:56:12' DAY(1) TO SECOND(0)"),
                     ],
                     'bool_col' => [
                         'type' => 'char',
-                        'dbType' => 'CHAR',
+                        'dbType' => 'char',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => true,
@@ -209,7 +209,7 @@ public static function columns(): array
                     ],
                     'bool_col2' => [
                         'type' => 'char',
-                        'dbType' => 'CHAR',
+                        'dbType' => 'char',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => false,
@@ -221,19 +221,19 @@ public static function columns(): array
                     ],
                     'ts_default' => [
                         'type' => 'timestamp',
-                        'dbType' => 'TIMESTAMP(6)',
+                        'dbType' => 'timestamp',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => true,
                         'autoIncrement' => false,
                         'enumValues' => null,
-                        'size' => null,
-                        'scale' => 6,
+                        'size' => 6,
+                        'scale' => null,
                         'defaultValue' => new Expression('CURRENT_TIMESTAMP'),
                     ],
                     'bit_col' => [
                         'type' => 'integer',
-                        'dbType' => 'NUMBER',
+                        'dbType' => 'number',
                         'phpType' => 'int',
                         'primaryKey' => false,
                         'notNull' => true,
@@ -250,7 +250,7 @@ public static function columns(): array
                 [
                     'id' => [
                         'type' => 'integer',
-                        'dbType' => 'NUMBER',
+                        'dbType' => 'number',
                         'phpType' => 'int',
                         'primaryKey' => true,
                         'notNull' => true,
@@ -262,7 +262,7 @@ public static function columns(): array
                     ],
                     'type' => [
                         'type' => 'string',
-                        'dbType' => 'VARCHAR2',
+                        'dbType' => 'varchar2',
                         'phpType' => 'string',
                         'primaryKey' => false,
                         'notNull' => true,