diff --git a/CHANGELOG.md b/CHANGELOG.md
index fb4d1dd..d8c25cd 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -58,7 +58,7 @@
 - Enh #350: Adapt to `Like` changes in `yiisoft/db` package (@vjik)
 - Enh #352: Support column's collation (@Tigrov)
 - New #358: Add `Connection::getColumnBuilderClass()` method (@Tigrov)
-- New #357: Implement `ArrayMergeBuilder`, `LongestBuilder` and `ShortestBuilder` classes (@Tigrov)
+- New #357, #363: Implement `ArrayMergeBuilder`, `LongestBuilder` and `ShortestBuilder` classes (@Tigrov)
 - Enh #360: Refactor `DMLQueryBuilder::upsert()` method (@Tigrov)
 
 ## 1.3.0 March 21, 2024
diff --git a/src/Builder/ArrayMergeBuilder.php b/src/Builder/ArrayMergeBuilder.php
index 22883d1..d877fff 100644
--- a/src/Builder/ArrayMergeBuilder.php
+++ b/src/Builder/ArrayMergeBuilder.php
@@ -49,7 +49,10 @@ protected function buildFromExpression(MultiOperandFunction $expression, array &
             $selects[] = "SELECT value FROM JSON_TABLE($builtOperand, '$[*]' COLUMNS(value $operandType PATH '$'))";
         }
 
-        return '(SELECT JSON_ARRAYAGG(value) AS value FROM (' . implode(' UNION ', $selects) . '))';
+        $orderBy = $expression->getOrdered() ? ' ORDER BY value' : '';
+        $unions = implode(' UNION ', $selects);
+
+        return "(SELECT JSON_ARRAYAGG(value$orderBy) AS value FROM ($unions))";
     }
 
     private function buildOperandType(string|ColumnInterface $type): string
diff --git a/src/Column/DateTimeColumn.php b/src/Column/DateTimeColumn.php
index d33a680..26bf497 100644
--- a/src/Column/DateTimeColumn.php
+++ b/src/Column/DateTimeColumn.php
@@ -31,7 +31,7 @@
  */
 final class DateTimeColumn extends \Yiisoft\Db\Schema\Column\DateTimeColumn
 {
-    public function dbTypecast(mixed $value): string|ExpressionInterface|null
+    public function dbTypecast(mixed $value): float|int|string|ExpressionInterface|null
     {
         $value = parent::dbTypecast($value);
 
diff --git a/tests/QueryBuilderTest.php b/tests/QueryBuilderTest.php
index d9174f8..974a8da 100644
--- a/tests/QueryBuilderTest.php
+++ b/tests/QueryBuilderTest.php
@@ -26,11 +26,6 @@
 use Yiisoft\Db\Tests\Common\CommonQueryBuilderTest;
 use Yiisoft\Db\Tests\Support\Assert;
 
-use function json_decode;
-use function sort;
-
-use const SORT_NUMERIC;
-
 /**
  * @group oracle
  */
@@ -622,9 +617,9 @@ public function testMultiOperandFunctionBuilderWithoutOperands(string $class): v
 
     #[TestWith(['int[]', 'int', '[1,2,3,4,5,6,7,9,10]'])]
     #[TestWith([new IntegerColumn(), 'number(10)', '[1,2,3,4,5,6,7,9,10]'])]
-    #[TestWith([new ArrayColumn(), '', '["1","2","3","4","5","6","7","9","10"]'])]
+    #[TestWith([new ArrayColumn(), '', '["1","10","2","3","4","5","6","7","9"]'])]
     #[TestWith([new ArrayColumn(column: new IntegerColumn()), 'number(10)', '[1,2,3,4,5,6,7,9,10]'])]
-    public function testMultiOperandFunctionBuilderWithType(
+    public function testArrayMergeWithTypeWithOrdering(
         string|ColumnInterface $type,
         string $operandType,
         string $expectedResult,
@@ -632,18 +627,18 @@ public function testMultiOperandFunctionBuilderWithType(
         $db = $this->getConnection();
         $qb = $db->getQueryBuilder();
 
-        $stringParam = new Param('[3,4,5]', DataType::STRING);
+        $stringParam = new Param('[4,3,5]', DataType::STRING);
         $arrayMerge = (new ArrayMerge(
-            "'[1,2,3]'",
-            [5, 6, 7],
+            "'[2,1,3]'",
+            [6, 5, 7],
             $stringParam,
-            self::getDb()->select(new ArrayExpression([9, 10])),
-        ))->type($type);
+            self::getDb()->select(new ArrayExpression([10, 9])),
+        ))->type($type)->ordered();
         $params = [];
 
         $this->assertSame(
-            '(SELECT JSON_ARRAYAGG(value) AS value FROM ('
-            . "SELECT value FROM JSON_TABLE('[1,2,3]', '$[*]' COLUMNS(value $operandType PATH '$'))"
+            '(SELECT JSON_ARRAYAGG(value ORDER BY value) AS value FROM ('
+            . "SELECT value FROM JSON_TABLE('[2,1,3]', '$[*]' COLUMNS(value $operandType PATH '$'))"
             . " UNION SELECT value FROM JSON_TABLE(:qp0, '$[*]' COLUMNS(value $operandType PATH '$'))"
             . " UNION SELECT value FROM JSON_TABLE(:qp1, '$[*]' COLUMNS(value $operandType PATH '$'))"
             . " UNION SELECT value FROM JSON_TABLE((SELECT :qp2 FROM DUAL), '$[*]' COLUMNS(value $operandType PATH '$'))"
@@ -652,17 +647,14 @@ public function testMultiOperandFunctionBuilderWithType(
         );
         Assert::arraysEquals(
             [
-                ':qp0' => new Param('[5,6,7]', DataType::STRING),
+                ':qp0' => new Param('[6,5,7]', DataType::STRING),
                 ':qp1' => $stringParam,
-                ':qp2' => new Param('[9,10]', DataType::STRING),
+                ':qp2' => new Param('[10,9]', DataType::STRING),
             ],
             $params,
         );
 
         $result = $db->select($arrayMerge)->scalar();
-        $result = json_decode($result);
-        sort($result, SORT_NUMERIC);
-        $expectedResult = json_decode($expectedResult);
 
         $this->assertSame($expectedResult, $result);
     }