diff --git a/CHANGELOG.md b/CHANGELOG.md
index d85daff14..0b3ee76a6 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -54,6 +54,7 @@
 - Enh #915: Remove `ColumnInterface` (@Tigrov)
 - Enh #917: Rename `ColumnSchemaInterface` to `ColumnInterface` (@Tigrov)
 - Enh #919: Replace `name()` with immutable `withName()` method in `ColumnInterface` interface (@Tigrov)
+- Enh #921: Move `DataType` class to `Yiisoft\Db\Constant` namespace (@Tigrov)
 
 ## 1.3.0 March 21, 2024
 
diff --git a/UPGRADE.md b/UPGRADE.md
index da8e9c863..2c8b0c6a7 100644
--- a/UPGRADE.md
+++ b/UPGRADE.md
@@ -163,3 +163,4 @@ Each table column has its own class in the `Yiisoft\Db\Schema\Column` namespace
 - Allow `QueryInterface::one()` to return an object;
 - Allow `QueryInterface::all()` to return array of objects;
 - Change `Quoter::quoteValue()` parameter type and return type from `mixed` to `string`;
+- Move `DataType` class to `Yiisoft\Db\Constant` namespace;
diff --git a/docs/guide/en/queries/transactions.md b/docs/guide/en/queries/transactions.md
index 16dac369c..3fec2c8fd 100644
--- a/docs/guide/en/queries/transactions.md
+++ b/docs/guide/en/queries/transactions.md
@@ -5,7 +5,7 @@ In order for the data to be consistent when multiple commands are involved, you
 ```php
 use Yiisoft\Db\Connection\ConnectionInterface;
 use Yiisoft\Db\Query\Query;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 
 /** @var ConnectionInterface $db */
 
diff --git a/docs/guide/pt-BR/queries/transactions.md b/docs/guide/pt-BR/queries/transactions.md
index a55e51280..4033a3fc9 100644
--- a/docs/guide/pt-BR/queries/transactions.md
+++ b/docs/guide/pt-BR/queries/transactions.md
@@ -5,7 +5,7 @@ Para que os dados sejam consistentes quando vários comandos estiverem envolvido
 ```php
 use Yiisoft\Db\Connection\ConnectionInterface;
 use Yiisoft\Db\Query\Query;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 
 /** @var ConnectionInterface $db */
 
diff --git a/src/Command/CommandInterface.php b/src/Command/CommandInterface.php
index 975cb9abf..e49de909b 100644
--- a/src/Command/CommandInterface.php
+++ b/src/Command/CommandInterface.php
@@ -9,6 +9,7 @@
 use Throwable;
 use Yiisoft\Db\Connection\ConnectionInterface;
 use Yiisoft\Db\Constant\ColumnType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Constant\PseudoType;
 use Yiisoft\Db\Exception\Exception;
 use Yiisoft\Db\Exception\InvalidArgumentException;
diff --git a/src/Command/Param.php b/src/Command/Param.php
index a521f6046..67d84c2d1 100644
--- a/src/Command/Param.php
+++ b/src/Command/Param.php
@@ -4,6 +4,7 @@
 
 namespace Yiisoft\Db\Command;
 
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Expression\ExpressionInterface;
 
 /**
diff --git a/src/Command/ParamInterface.php b/src/Command/ParamInterface.php
index da17a6347..abd645d07 100644
--- a/src/Command/ParamInterface.php
+++ b/src/Command/ParamInterface.php
@@ -4,6 +4,8 @@
 
 namespace Yiisoft\Db\Command;
 
+use Yiisoft\Db\Constant\DataType;
+
 /**
  * This interface represents a parameter to bind to an SQL statement.
  */
diff --git a/src/Command/DataType.php b/src/Constant/DataType.php
similarity index 95%
rename from src/Command/DataType.php
rename to src/Constant/DataType.php
index 4a7f2f6e4..63afecebb 100644
--- a/src/Command/DataType.php
+++ b/src/Constant/DataType.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Yiisoft\Db\Command;
+namespace Yiisoft\Db\Constant;
 
 /**
  * Types of data.
diff --git a/src/QueryBuilder/AbstractQueryBuilder.php b/src/QueryBuilder/AbstractQueryBuilder.php
index a8f2c54bb..d9fa4a235 100644
--- a/src/QueryBuilder/AbstractQueryBuilder.php
+++ b/src/QueryBuilder/AbstractQueryBuilder.php
@@ -5,7 +5,7 @@
 namespace Yiisoft\Db\QueryBuilder;
 
 use Yiisoft\Db\Command\CommandInterface;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Command\ParamInterface;
 use Yiisoft\Db\Connection\ConnectionInterface;
 use Yiisoft\Db\Connection\ServerInfoInterface;
diff --git a/src/Schema/AbstractSchema.php b/src/Schema/AbstractSchema.php
index 78b42cc95..3cfa7d958 100644
--- a/src/Schema/AbstractSchema.php
+++ b/src/Schema/AbstractSchema.php
@@ -7,7 +7,7 @@
 use Psr\SimpleCache\InvalidArgumentException;
 use Throwable;
 use Yiisoft\Db\Cache\SchemaCache;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Connection\ConnectionInterface;
 use Yiisoft\Db\Constraint\Constraint;
 use Yiisoft\Db\Constraint\IndexConstraint;
diff --git a/src/Schema/SchemaInterface.php b/src/Schema/SchemaInterface.php
index bddc3061f..db7cc3375 100644
--- a/src/Schema/SchemaInterface.php
+++ b/src/Schema/SchemaInterface.php
@@ -5,7 +5,7 @@
 namespace Yiisoft\Db\Schema;
 
 use Throwable;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Constant\ColumnType;
 use Yiisoft\Db\Constant\PseudoType;
 use Yiisoft\Db\Constraint\ConstraintSchemaInterface;
diff --git a/tests/AbstractQueryBuilderTest.php b/tests/AbstractQueryBuilderTest.php
index 49e1f940a..580683dcf 100644
--- a/tests/AbstractQueryBuilderTest.php
+++ b/tests/AbstractQueryBuilderTest.php
@@ -10,7 +10,7 @@
 use PHPUnit\Framework\TestCase;
 use stdClass;
 use Throwable;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Command\Param;
 use Yiisoft\Db\Exception\Exception;
 use Yiisoft\Db\Exception\InvalidArgumentException;
diff --git a/tests/AbstractSchemaTest.php b/tests/AbstractSchemaTest.php
index 4430c9cd4..db453111e 100644
--- a/tests/AbstractSchemaTest.php
+++ b/tests/AbstractSchemaTest.php
@@ -5,7 +5,7 @@
 namespace Yiisoft\Db\Tests;
 
 use PHPUnit\Framework\TestCase;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Tests\Support\Assert;
 use Yiisoft\Db\Tests\Support\TestTrait;
 
diff --git a/tests/Common/CommonCommandTest.php b/tests/Common/CommonCommandTest.php
index 6e1deef94..b43ac3334 100644
--- a/tests/Common/CommonCommandTest.php
+++ b/tests/Common/CommonCommandTest.php
@@ -6,7 +6,7 @@
 
 use ReflectionException;
 use Throwable;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Command\Param;
 use Yiisoft\Db\Constant\ColumnType;
 use Yiisoft\Db\Constant\PseudoType;
diff --git a/tests/Provider/CommandPDOProvider.php b/tests/Provider/CommandPDOProvider.php
index 66f5c1dfb..62929891a 100644
--- a/tests/Provider/CommandPDOProvider.php
+++ b/tests/Provider/CommandPDOProvider.php
@@ -4,7 +4,7 @@
 
 namespace Yiisoft\Db\Tests\Provider;
 
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 
 class CommandPDOProvider
 {
diff --git a/tests/Provider/CommandProvider.php b/tests/Provider/CommandProvider.php
index ef542e013..d0387d58f 100644
--- a/tests/Provider/CommandProvider.php
+++ b/tests/Provider/CommandProvider.php
@@ -7,7 +7,7 @@
 use ArrayIterator;
 use IteratorAggregate;
 use Traversable;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Command\Param;
 use Yiisoft\Db\Constant\ColumnType;
 use Yiisoft\Db\Expression\Expression;
diff --git a/tests/Provider/QueryBuilderProvider.php b/tests/Provider/QueryBuilderProvider.php
index bd7afa51c..977a0bf39 100644
--- a/tests/Provider/QueryBuilderProvider.php
+++ b/tests/Provider/QueryBuilderProvider.php
@@ -5,7 +5,7 @@
 namespace Yiisoft\Db\Tests\Provider;
 
 use ArrayIterator;
-use Yiisoft\Db\Command\DataType;
+use Yiisoft\Db\Constant\DataType;
 use Yiisoft\Db\Command\Param;
 use Yiisoft\Db\Constant\ColumnType;
 use Yiisoft\Db\Constant\PseudoType;